https://padlet.com/gina_laffin/gix1liatma1h Record key ideas with your partner from the interactive site. en-us 2017-01-04 13:58:34 UTC 2017-01-04 16:07:01 UTC hello@padlet.com https://padlet.com/gina_laffin/gix1liatma1h/wish/145289496 2017-01-04 15:42:13 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145289496 https://padlet.com/gina_laffin/gix1liatma1h/wish/145289746 Earliest life was 3.9 billion years ago.]]> 2017-01-04 15:42:49 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145289746 https://padlet.com/gina_laffin/gix1liatma1h/wish/145289771 By looking at events in order, we sometimes see connections between one event and another. ]]> 2017-01-04 15:42:54 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145289771 https://padlet.com/gina_laffin/gix1liatma1h/wish/145289815 1. Earth's History goes back billions of years.
2. Earth's earliest life was 3,900,000,000 years ago.
3.Earliest land plants were seen 420,000,000 years ago.
4. Earth's largest mass extinction was 248,000,000 years ago.
5. Dinosaurs went extinct 65,000,000 years ago.
6. Early hominid was found 4,000,000 years ago.
7. By looking at events in order we can sometimes see connections.
8. Rock layers can represent periods of time.
9. Fossils buried in rock layers are evidence of Earths early history.
10. Radiometric dating give absolute dates.
11. Geological time scale is like a timeline and it shows eon area and period.

]]> 2017-01-04 15:43:00 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145289815 https://padlet.com/gina_laffin/gix1liatma1h/wish/145289881 Earth's history is Billions of years old

 fossils buried in rocks are evidence for the events in history 

]]> 2017-01-04 15:43:10 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145289881 https://padlet.com/gina_laffin/gix1liatma1h/wish/145290068 The earth and moon formed 4,600,000,000 years ago]]> 2017-01-04 15:43:38 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145290068 https://padlet.com/gina_laffin/gix1liatma1h/wish/145290288 Earth is billions of years old,  nearly 5 billions years.

Humans were one of the latest of species to become known to Earth.

Superposition allows us to determine the age of fossils.

Eras are a time that we can refer to if we were talk talk about a certain time period


]]> 2017-01-04 15:44:11 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145290288 https://padlet.com/gina_laffin/gix1liatma1h/wish/145290493 The Pre-Archean was the time period before the Archean, and there is no evidence of life in that time period.]]> 2017-01-04 15:44:36 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145290493 https://padlet.com/gina_laffin/gix1liatma1h/wish/145290512 The earliest life on earth was 3,900,000,000]]> 2017-01-04 15:44:38 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145290512 https://padlet.com/gina_laffin/gix1liatma1h/wish/145290777 The history of the earth started 4,600,000,000 years ago
Relative order shows the events in order but it does not show the actual dates of the events
The law of superposition gives us the relative age of the fossils but radiometric dating gives us the absolute date]]> 2017-01-04 15:45:12 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145290777 https://padlet.com/gina_laffin/gix1liatma1h/wish/145290926 BY looking at events in order, we sometimes see connections between one event  and another. ]]> 2017-01-04 15:45:34 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145290926 https://padlet.com/gina_laffin/gix1liatma1h/wish/145291028 Earth's history started billions of years ago.]]> 2017-01-04 15:45:51 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145291028 https://padlet.com/gina_laffin/gix1liatma1h/wish/145291092 The Largest mass extinction was 248 million years ago

]]> 2017-01-04 15:46:04 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145291092 https://padlet.com/gina_laffin/gix1liatma1h/wish/145291547 Early Land Plants formed 420,000,000 years ago

]]> 2017-01-04 15:47:13 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145291547 https://padlet.com/gina_laffin/gix1liatma1h/wish/145291600 Each rock layer represents a period if time in Earth's history, so the entire sequence of layers is another timeline. ]]> 2017-01-04 15:47:23 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145291600 https://padlet.com/gina_laffin/gix1liatma1h/wish/145291757 Earth's history can date back to billions of years ago. 

The law of superposition states that rocks lower in the earth are  older, which can help us tell the timeline of the earth. 

Radiometric dating gives us exact dates for rocks and fossil. ]]> 2017-01-04 15:47:56 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145291757 https://padlet.com/gina_laffin/gix1liatma1h/wish/145291941 Each of rock layers represents a period of time in Earths history ]]> 2017-01-04 15:48:30 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145291941 https://padlet.com/gina_laffin/gix1liatma1h/wish/145292205 The Earth is billions of years old.

The law of superposition states that the newest layer of rock is on the top, and the oldest layer is on the bottom.

Radiometric dating is used to help find the exact date of an organism.]]> 2017-01-04 15:49:09 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145292205 https://padlet.com/gina_laffin/gix1liatma1h/wish/145292557 the oldest layer of rock ends up at the bottom and the youngest end up at the top. it's referred to as the law of superposition. ]]> 2017-01-04 15:50:13 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145292557 https://padlet.com/gina_laffin/gix1liatma1h/wish/145293201 Relative time is recorded in rocks

]]> 2017-01-04 15:51:57 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145293201 https://padlet.com/gina_laffin/gix1liatma1h/wish/145293429 The Law of Superposition states that you can compare the relative ages of things based on the position of the rock layer they are in. The oldest layers are on the bottom and the youngest layers are on the top.]]> 2017-01-04 15:52:31 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145293429 https://padlet.com/gina_laffin/gix1liatma1h/wish/145296485 Radiometric dating is used to find the exact ages of rocks or fossils in different layers.]]> 2017-01-04 15:59:58 UTC https://padlet.com/gina_laffin/gix1liatma1h/wish/145296485