# data[].attributes.body
A - Scientist use ice cores to explain climate changing because they can inspect/find things in a ice core to prove that the atmosphere has changed.
C -  In the text it states “Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years.”
E - They can figure what our atmosphere was like because of things trapped inside the ice core. almost like a fossil being trapped inside amber.
S - Scientist can use ice cores to learn more about our atmosphere way back then.

# data[].attributes.body
A- Scientists use ice cores to explain the changing climate by studying and inspecting ice cores and how the atmosphere has changed throughout the years
C- "After analyzing enough ice core slices, which may each represent anywhere from a week to a year of time, a researcher can look for patterns to track changes in the atmosphere's composition and temperature, and what activity on Earth shaped it."
E- In the sentence, it tells us that the atmosphere has changed throughout the years by studying and analyzing ice cores
S- Therefore we can use ice cores to explain climate change

# data[].attributes.body
A-  Scientist uses ice cores to explain climate change by analyzing the ice cores and finding differences between the earths atmosphere then to now
C- In the article it says "Like prehistoric fly trapped in amber during dinosaur days airborne relics of earths earlier climate including dust, air bubbles, sea salts, volcanic ash and soot from forest fires can end up trapped in glacial ice for eons. To climate scientist those relics tell a story about how our planets climate and atmosphere have changed over thousands over thousands of years ""
E- The text evidence states that all the little air bubbles dust sea salts and other stuff can show changes in the earth atmosphere
S- In all with samples of ice cores scientist can see how earth has changed over the years

# data[].attributes.body
How do scientists use ice cores to explain climate change?

A- Scientists use ice cores to explain climate change by studying and inspecting the ice cores for evidence of former atmosphere in them and comparing it to now then taking that knowledge to predict and understand the climate better.

C- In the article, it says: "Sometimes researchers are studying actual bubbles of the early atmosphere, trapped in the ice as it formed" and "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years."

E- These quotations tell us that ice cores show evidence of change in climate throughout history and how we can learn more from them.

S- Ice cores show and tell us about the past and its climate and how it compares to now.

# data[].attributes.body
A-  Scientists use ice cores to explain climate change by analyzing the ice cores by finding the difference of the atmosphere throughout the years.

C-  In the text it states “Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years.”

E- With the text provided it states that in the air bubbles there is dust, sea salts etc., and that shows the changes in the atmosphere throughout the years.

S- In summary an ice core sample can show you how the earth has changed over time.

# data[].attributes.body
C -

# data[].attributes.body
A- Scientists use ice cores to explain climate change by showing how different the atmosphere was then to now
C- The text says "After analyzing enough ice core slices, which may each represent anywhere from a week to a year of time, a researcher can look for patterns to track changes in the atmosphere's composition and temperature, and what activity on Earth shaped it." saying the that atmosphere was different then.
E-

# data[].attributes.body
A-Scientists use ice cores to analyze the climate changes of showing the differences between atmospheres at different past times
C-The text says "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years"
E-The text evidence states that all the little air bubbles, dust, sea salts and more can show huge changes in earths atmospheres
S- So pretty much ice core pieces can show you all of the former past times the ice core has had.

# data[].attributes.body
A- Scientist use ice cores to explain climate change by looking at samples of ice from the earth that have samples of trapped atmosphere and seeing how the atmosphere has changed since then.

C- In the text it says "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years"

E- My citation shows that by looking at samples of ice from the earth you can see ''how our planet's climate and atmosphere have changed over thousands of years''

S- All in All with samples of ice from the earth scientists can see how's the earth has changed over thousands of years.

# data[].attributes.body
A. Scientists use ice cores to explain climate change by examining samples of the atmosphere trapped over the years in cores.
C. "Ice cores can tell scientists about temperature, precipitation, atmospheric composition, volcanic activity, and even wind patterns. ... Scientists tie all of these different threads of information provided by the ice cores together and weave them into a single continuous picture of the Earth's past climate."
E. The information that can be obtained from these ice cores is tremendous and creates a huge impact on explaining how the climate has changed over time.
S. In summary, scientists use the statistics of trapped samples of the past atmosphere in ice cores and study them to compare to the temperatures of today. By doing this, they can accurately explain and prove climate change is a real problem and is getting worse and worse over time.

# data[].attributes.body
A - Scientists use these ice cores in order to explain climate change by taking these samples and researching contents of the early atmosphere trapped within bubbles in the ice cores themselves.
C - "Sometimes researchers are studying actual bubbles of the early atmosphere, trapped in the ice as it formed. To collect them, they crush the sample under a vacuum hood, which keeps other air out while they pull the newly released air into vials.

Scientists run melted samples through various instruments—mass spectrometers, scanning electron microscopes, gas chromatographs—to find tiny pieces of pollution, like sulfates, traces of metals, or radioactive fallout, or natural aerosols like dust or volcanic ash."
E - Basically, bubbles within these ice cores contain small samples of the atmosphere from millions of years ago. These small pockets of early atmosphere had a very different composition than it is in the present, containing things like small traces of pollution, dust and ash, and even radioactive fallout. Scientists use these pieces of evidence to see how the climate has changed over time from the contents of these small samples of atmosphere.
S - So yeah, scientists explain these changes in climate by examining samples of atmosphere within the ice cores and studying their contents. That way, scientists are able to see the change in climate from millions of years ago.

# data[].attributes.body
A- scientists use ice cores to explain climate change by the  dust, air bubbles, sea salts, volcanic ash, and soot from forest fires that can get trapped to help them figure our how the past climates used to be.
C-"dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years"
E-this is telling us that the dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped and they use it to see how our planet's climate and atmosphere have changed over thousands of years.
S-scientists use ice cores to explain climate change by the  dust, air bubbles, sea salts, volcanic ash, and soot from forest fires and can figure out how the planet's climate and atmosphere have changed over time.

# data[].attributes.body
A- Scientists use ice core to help them find out how climate has changed over the past years.  They find the evidence by using the air bubbles, sea salt and volcanic ash.
C- "Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years".
E-Scientist use this because it tells how cold or hot it was use to be.
S- Researches use Ice core to determine how temperature has changed.

# data[].attributes.body
A- Scientists use ice cores to explain climate change because it helps them determine the past climate changes. They find this because in ice cores there are evidence like air bubbles, sea salts, volcanic ash, and soot from forest fires.
C - "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years."
E - Scientist use it because it tells a story about how cold it was or how hot it was. They also use it because it tells about the changes in temperature.
S - Researchers use ice cores because they tell change in climate and temperature.

# data[].attributes.body
A- Scientists use ice cores to help them figure out past climate changes. In ice cores, there are things such as air bubbles, soot, volcanic ash, and sea salts encased in the ice cores.
C- ¨To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years.¨To unlock the information inside an ice core, researchers in the lab may melt or crush the sample bit by bit; each deeper layer represents a slightly earlier time in the Earth's climate history¨ ¨Earth's climate warmed to the temperatures the planet is predicted to reach in the next two centuries.¨
E- The climate scientist examines every piece little by little just to get a glance at the climate was like a very long time ago. Earth's climate is definitely going to change, as it already has.
S- Ice cores are proof that the climate can and will change. If scientists keep using ice cores, it could change the whole perspective of the world

# data[].attributes.body
A- Scientists use ice cores to explain climate change. They use this to take samples and use examples such as dust,air bubbles, sea salts and more.
C-Some scientists melt strips of ice bubbles that are trapped that can be observed with many different instruments
E-The researchers take pieces of ice to analyze what ice was from current to former times. This can also tell the temperature of the piece of ice and tell how much Carbon-16 there was.
S-Ice Cores can be great examples of climate change and show how old ice is. Relics compared to current ice can easily be detected with easy differences.

# data[].attributes.body
A- Scientists use ice cores to explain climate change by the different layers of ice. They do this by taking a sample of ice from a glacier and melting or crushing it to find different relics of dust, air bubbles, sea salts, etc, encased in the small piece of ice which tells us different kinds of information about the climate thousands of years ago.

C- “...airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons.... those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years.” “To unlock the information inside an ice core, researchers in the lab may melt or crush the sample bit by bit; each deeper layer represents a slightly earlier time in the Earth's climate history.”

E- To get into the other layers inside of a piece of ice, the scientists melt or slowly crush away the different layers piece by piece noticing that each deeper layer is from an earlier part of the earth's history. They can figure out the temperature and/or climate from different relics that have been frozen into the ice. With those relics they can find the information to compare the information about the temperature and climate of today to figure out how it has changed over time.

S- Ice cores help explain climate change to scientists by the relics that are in the different layers of ice. They then compare each layer to another and find how the climate and temperature has changed.

# data[].attributes.body
A- scientist uses ice core to explain climate change. air born relics predict it by using dust, air bubbles, sea salt volcanic ashes ans soot from forest fires.
C- researchers melt little pieces bit by bit the ice comes in small strips sometimes they study bubbles trapped in ice they run the samples through variety of instruments .
E- the scientist would look for tracks or patterns examining the ice bubbles trapped can determine the amount of carbon-16 and global temperature
S- the ice cores ca explain the climate by comparing patterns and layers something like fossils when they do that it helps them explain the temperature of the atmosphere.

# data[].attributes.body
A- Scientists use ice cores to explain climate change. They do this by using dust, air bubbles, sea salts, volcanic ash, and soot from forest fires that are trapped in glacial ice.
C-"Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years."
E- The scientists melt or chip away layers of ice from the ice core to examine what the climate was like during that time. Layer by layer it shows a different period of Earth's climate. The air bubbles hold the volcanic ash, soot etc. This all helps them find out more about the climate and what changes it has gone through, throughout Earth's history.
S- Scientists use ice cores to find out more about the Earth's climate change. They have to be extremely careful dealing with the ice layers because one single fingerprint could ruin the whole layer. The information ice cores give us is extremely useful though and has told the scientists a lot about climate change.

# data[].attributes.body
A- Scientists use ice cores to explain climate change by using the data found inside of them. The scientists use instruments such as, a vacuum hood to collect information that may be inside the ice cores, trapped in bubbles.
C- "Sometimes researchers are studying actual bubbles of the early atmosphere, trapped in the ice as it formed. To collect them, they crush the sample under a vacuum hood, which keeps other air out while they pull the newly released air into vials." as well as "Examining the gasses trapped in ice cores is how scientists first learned that the amount of carbon dioxide and the global temperature have been linked at least the last million years of Earth's history."
E- Scientists can use the information from the bubbles to compare current day atmosphere samples to those from long ago. This information can tell the scientists how the climate has changed and it can give them insight into what the climate will look like in the future.
S- Scientists use information found inside of ice cores to explain how the climate has changed up to the modern day climate and how the climate might be in the future. Using this information scientists are able to better explain climate change.

# data[].attributes.body
A - Scientists use ice cores to explain climate change using those core layers. These layers can provide ash, sea salt, air bubbles, and other pieces from the past that in turn can give a glimpse of past climates and how they were different then. The difference shows and explicitly proves the existence of climate change.
C - "After analyzing enough ice core slices, which may each represent anywhere from a week to a year of time, a researcher can look for patterns to track changes in the atmosphere's composition and temperature, and what activity on Earth shaped it."

"the gasses trapped in ice cores is how scientists first learned that the amount of carbon dioxide and the global temperature has been linked at least the last million years of Earth's history."
E - The citation above shows the analysis scientists conduct provides the conclusion that they have found out that there have been changes in the atmosphere's temperature. This temperature is also called the climate of the earth, and their analysis shows a change in that climate.
S - All in all, scientists have used nature created archives in ice to get a glimpse of past properties of the earth. With this, they have found out that the past climate was different than today's, leading them to conclude that the climate had changed.

# data[].attributes.body
A: In the ice cores that scientists have drilled out, they can contain pieces of the atmosphere from 1000s of years ago. This can include volcanic ash, tiny pieces of pollution or gases from thousands of years ago.
C: it takes colder temperatures for water vapor containing the lighter oxygen isotope to turn into precipitation."
E: When the scientists pull the ice from the ground they melt down the gases within the ice and use a vacuum to analyze and study it. Based on the ratio of the gases in the ice they can determine how old this ice is .
S: The ratio of gases inside ice to compare to other ice cores and with this they can determine the global temperature up to thousands of  years ago. This can be compared with fossils to determine to determine what animals existed in certain time periods as well.

# data[].attributes.headline
A-  Scientists tie all of these different threads of information provided by the ice cores together and weave them into a single continuous picture of the Earth's past climate.

# data[].attributes.subject
A-  Scientists tie all of these different threads of information provided by the ice cores together and weave them into a single continuous picture of the Earth's past climate.

# data[].attributes.body
C- The ice arrives in small strips, about 1-by-1 inch apiece, which are smaller slices of the roughly three-foot-long, coffee-can-wide pieces a drill pulls out of a glacier.
E-  every clue in the ice, whether a grain of sea salt or an air bubble, is so miniscule and the measurements must be incredibly precise, any analysis must be done in a "clean room" setting.
S- Scientists hope to collect a new ice core from the eastern side of the Trans-Antarctic Mountains, which today separate the East and West Antarctic Ice Sheets. Much of the land under the West Antarctic Ice Sheet is below sea level.
3rd core  12/3/2020
Medko delong

# data[].attributes.body
A- Scientist use ice cores to explain climate change by collecting data from the inside of the ice cores. Bubbles are trapped inside of Ice Cores and are what they study.

C- The significance of these bubbles is that they are bubbles of ancient atmosphere that have been trapped in the ice since it was first formed over Antarctica.

E- These bubbles help them measure the composition of the ancient atmosphere. This can also help estimate the temperature in the past. In order to unlock the secret of ice course, researchers melt or crush the sample The more that they melt or crush, the deeper down they get in the more information to get about past climate.

S- in conclusion do you know that high scores are very important to explain the climate changes over time.

# data[].attributes.body
A-Scientist use ice cores to unlock information about the weather and climate long ago, because it was trapped in air bubbles in the ice.
C-"Scientists run melted samples through various instruments—mass spectrometers, scanning electron microscopes, gas chromatographs—to find tiny pieces of pollution, like sulfates, traces of metals, or radioactive fallout, or natural aerosols like dust or volcanic ash."
E- This citation states that scientist run test on the ice to find tiny pieces if pollution. This can let then know what the weather and air-conditions were like back then.
S- In the end scientist have come to the conclusion that the climate is getting worse and the temperature is rising.

# data[].attributes.body
A-Scientist use ice cores to explain climate change by measuring greenhouse gases, oxygen, water vapor, Carbon-14, and nitrogen in the ice cores. Then they compare that to our current atmosphere and how that will change.
C-"to unlock the information inside an ice core, researchers in the lab may melt or crush the sample bit by bit; each deeper layer represents a slightly earlier time in the Earth's climate history. The ice arrives in small strips, about 1-by-1 inch apiece,"
E-This is how scientists get the information out of the ice cores to learn about the ancient atmosphere.
S-Ice cores help scientists to explain climate change by comparing the atmosphere to today's atmosphere.

# data[].attributes.body
A- Scientists use ice cores to explain climate change by measuring the greenhouse gases from the bubbles. In doing so, scientists find out what the climate was like, currently is like, and will continue to be like.
C- "Going back and looking at what the Earth's climate was like in the past and that gives us information on how the Earth's climate is changing now and how it might change in the future."
E- This quote is from scientist Dr. Nerilie Abram in which she is explaining how ice Cores help explain climate change.
S- Scientists use ice cores to explain climate change by measuring the greenhouse gases contained in bubbles that help indicate certain changes in the atmosphere's climate. These measurements show scientists climate changes from centuries ago, today, and climate changes in the future.

# data[].attributes.body
A- Scientists use ice cores to explain climate change by observing each deeper layer of the ice core and measuring greenhouse gases from the bubbles to get sight of Earth's climate history.
C- In the text, it states "To unlock the information inside an ice core, researchers in the lab may melt or crush the sample bit by bit; each deeper layer represents a slightly earlier time in the Earth's climate history." The text also states "To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years."
E- These text pieces tell us that researchers find the things that are trapped inside of ice cores useful to look back on our climate history. Scientists use this information to compare it to our climate now.
S- There are many ways for scientists to use ice cores as an explanation for climate change by not only observing ice core layers but by also measuring green house gases.

# data[].attributes.body
How do scientists use ice cores to explain climate change?
A: Scientist use ice cores to explain climate change by looking at the different layers of the ice cores. When finding evidence of climate change, scientists would take a sample the ice core and they would crush or melt it. They do this to determine whats been trapped inside of it. Some examples of things that could be trapped inside ice cores are bubbles, dust, soot, volcanic ash, and sea salts. From these scientist can look for greenhouse gases, carbon-14, and carbon dioxide.
C:¨Like a prehistoric fly trapped in amber during dinosaurs´ days, airborne relics of Earth´s earlier climate-- including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires-- can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet´s climate and atmosphere have changed over thousands of years.¨
E: This quote is basically stating these different things scientist find trapped inside ice cores help reveal past climate. Scientists can take this information and compare it to the climate we experience today. Ice cores help scientists take a look into the past of Earth´s atmosphere.
S: In conclusion, ice cores help scientist explain climate change because they contain air bubbles, ash, dust, etc. that help scientists determine the difference in climate in the past and how it has changed over time.

# data[].attributes.body
A-researchers in the lab may melt or crush the sample bit by bit; each deeper layer represents a slightly earlier time in the Earth's climate history. The ice arrives in small strips, about 1-by-1 inch apiece, which are smaller slices of the roughly three-foot-long, coffee-can-wide pieces a drill pulls out of a glacier.

B-Sometimes researchers are studying actual bubbles of the early atmosphere, trapped in the ice as it formed. To collect them, they crush the sample under a vacuum hood, which keeps other air out while they pull the newly released air into vials.

Scientists run melted samples through various instruments—mass spectrometers, scanning electron microscopes, gas chromatographs—to find tiny pieces of pollution, like sulfates, traces of metals, or radioactive fallout, or natural aerosols like dust or volcanic ash.

c:Because every clue in the ice, whether a grain of sea salt or an air bubble, is so miniscule and the measurements must be incredibly precise, any analysis must be done in a "clean room" setting. The researchers wear body suits and multiple layers of gloves; the room must have ultraclean filters and vents to keep the air pristine.
D-

# data[].attributes.body
A- Scientists use ice cores to explain climate change based on the layers in it. They can look at a sample of the ice core and then melt and crush it to determine what is inside of it.There coud be things like dust, air bubbles, volcanic ash, sea salts, and soot. Looking at these things helps them determine if it has warmed or cooled.
C-  "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years."
E- This quote is saying that the things the scientists find in the ice cores can help determine the temprature and how the atmosphere was like back then.
S- In conclusion, scientists use ice cores to determine how the atmosphere was like back then, and see how cold, warm, or what happened when the ice core was formed and the years it survived by looking at what is found inside the cores.

# data[].attributes.body
A: Scientists use ice cores to explain climate change because they can look at the different layers of the ice cores. To find things, scientists would have a sample of the ice core and crush or melt it to determine whats inside it. Some things that could be trapped in the ice cores include including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires.
C: "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons. To climate scientists, those relics tell a story about how our planet's climate and atmosphere have changed over thousands of years."
E: This quote is pretty much saying that these different things that scientists can find in the ice cores help reveal about the past climate and scientists can compare that climate to the climate now. The ice cores help scientists have a look into the past.
S: In summary, ice cores help explain climate change because they may contain things such as air bubbles or volcanic ash which can help scientists determine the different climates and how they have changed.

# data[].attributes.body
A- Scientists use ice cores to explain climate change my examining the layers that each ice core has. Scientists will take a sample of the ice core and either crush or melt that sample to reveal air bubbles that have many particles trapped inside which can help them determine the past climates.
C- "To unlock the information inside an ice core, researchers in the lab may melt or crush the sample bit by bit; each deeper layer represents a slightly earlier time in the Earth's climate history." "Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate—including dust, air bubbles, sea salts, volcanic ash, and soot from forest fires—can end up trapped in glacial ice for eons."
E- Scientist use these ice cores and can find so many things that will tell them so much about Earth's history and the history of the climate. The deeper they go in the ice the older the ice is. This relates to the law of superposition and undisturbed rock strata. Scientists have a lot more methods and machines that they can use apart from just crushing and melting the ice cores.
S- In other words scientist learn a lot about the Earth from ice cores. The deeper they dig the more information they can find.

# data[].attributes.body
A: Scientists use ice cores based on the layers in it, to determine if the climate has changed, like if it has warmed, coolen, or something of similarity. To find this, scientists would have a sample of the ice core, crush, melt, or do something to determine what is trapped inside. They can find all sorts of things from the atmosphere, natural, or non-natural stuff. These can be volcanic ash, evidence of nuclear fallout, pollution, etc. The can determine the ratio of oxygen-16 to oxygen-18 to determine the global temperature when the ice was formed.
C: "Scientists run melted samples through various instruments—mass spectrometers, scanning electron microscopes, gas chromatographs—to find tiny pieces of pollution, like sulfates, traces of metals, or radioactive fallout, or natural aerosols like dust or volcanic ash." "The ratio of "light" oxygen-16 to "heavy" oxygen-18 in a sample, for instance, reveals the global temperature when the ice formed; it takes colder temperatures for water vapor containing the lighter oxygen isotope to turn into precipitation. Examining the gasses trapped in ice cores is how scientists first learned that the amount of carbon dioxide and the global temperature have been linked at least the last million years of Earth's history."
E: Basically, the ice is examined using methods such as scanning electron microscopes, gas chromatographs, and other instruments to find evidence of a change in climate. Based on certain ratio of gases found in the ice, they can determine the termperature and how the atmosphere was like back then.
S: In conclusion, scientists can use ice cores to determine how the atmosphere was like back then using certain things found inside the ice cores and determine how cold, warm, or what happened when the ice core was formed and the years it survived.

# data[].attributes.body
A: In the ice cores that scientists have drilled out, they can contain pieces of the atmosphere from 1000s of years ago. This can include volcanic ash, tiny pieces of pollution or gases from thousands of years ago. They can examine the ratio of the gas or, for example oxygen-16 to oxygen-18 to determine the global temperature from when the ice was formed.
C: "The ratio of "light" oxygen-16 to "heavy" oxygen-18 in a sample, for instance, reveals the global temperature when the ice formed; it takes colder temperatures for water vapor containing the lighter oxygen isotope to turn into precipitation."
E: When the scientists pull the ice from the ground they melt down the gases within the ice and use a vacuum to analyze and study it. Based on the ratio of the gases in the ice they can determine how old this ice is and they can also use ice from different time periods to compare to the gases in this ice to determine more accurately how the graphs of the global temperature can change.
S: In summarization scientists use the ratio of gases inside ice to compare to other ice cores and with this they can determine the global temperature up to thousands of years ago. This can be compared with fossils to determine to determine what animals existed in certain time periods as well.