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This is an interactive lesson on force.  Grover from Sesame Street is the initial explainer.  I loved this lesson.

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Forces, Sports and Fitness! | PBS LearningMedia

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Score big points with a sports-crazy dog! A Jack Russel Terrier will show you the science of force through sports and fitness. Practice using seven winning text features that help make reading fun!

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These videos show examples of different types of weather.

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Different Types of Weather | PBS LearningMedia

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Learn how four factors—temperature, wind, precipitation, and sunlight and clouds—are present in different types of weather. Use this resource to provide opportunities for students to make observations and find evidence of the four factors that describe the weather.

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Objects at rest will remain at rest until a force causes it to move.

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When the bottom block is knocked away by the "whacker" force, the rest of the stack resists moving horizontally along with it. This is due to a phenomenon called inertia -a resistance to change in motion. Inertia is the subject of Isaac Newton's first law of motion: An object remains at rest, or in uniform motion in a straight line, unless it's forced to change its state of motion by forces acting upon it.

Mass is a measure of inertia, as shown in Newton's second law: Force = mass x acceleration. In other words, the more massive something is, the harder you have to push or pull it to change its state of motion. The stack of blocks is fairly massive, so it has quite a bit of inertia.

You may notice, though, that the stack moves horizontally just a bit, especially as the stack gets smaller and therefore has less inertia. That's because there's a frictional force between the bottom block and the stack above it. If we could turn friction off, the stack wouldn't move sideways at all.

The stack doesn't stay in midair, of course, but falls to the tabletop. That's due to a different force, the force of gravity. (But you knew that, didn't you?)

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When the bottom block is knocked away by the "whacker" force, the rest of the stack resists moving horizontally along with it. This is due to a phenomenon called inertia -a resistance to change in motion.

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This is an interactive lesson that helps the student describe different kinds of weather.

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What Is Weather? | Interactive Lesson | PBS LearningMedia

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Students learn about four factors that describe different types of weather-temperature, wind, precipitation, and sunlight and clouds-as they explore various weather conditions and find evidence that describes each type of weather in this interactive lesson by GBH. Interactive activities engage students as they observe and identify evidence of changing weather conditions and record factors evident in various types of weather.

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This is a lesson plan for observing and recording weather data for a month, and how to use that data.

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Using Weather Data to Find Patterns | Lesson Plan | PBS LearningMedia

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Observe and record daily weather factors to learn how weather changes over time. This GBH lesson plan introduces weather phenomena with a PEEP and the Big Wide World video and includes handouts to help students track daily weather factors at their location.

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Our World: What Is a Hurricane? | Our World | NASA eClips

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This NASA video segment explains the formation of hurricanes. Go behind the scenes with a meteorologist at the Weather Channel in Atlanta, Georgia to learn how scientists predict hurricanes and hurricane formation.

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How Do Hurricanes Form? | NASA Space Place – NASA Science for Kids

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The video shows how the young sunflowers follow the movement of the sun to get the most amount of sunlight for photosynthesis.

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Description: This is an excellent phenomenon that can be used in many different units. According to researchers only young sunflowers will follow the Sun. These flowers are following a natural circadian rhythm to receive the most light for photosynthesis. However when they mature the flowers will mainly face east. The reason for this is fairly simple, bees like warm flowers, and the flowers facing the east are the warmest.

Web Resources: The Mystery Of Why Sunflowers Turn To Follow The Sun - Solved - NPR, Helianthus - Wikipedia

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Why Do Sunflowers Follow the Sun? - The Wonder of Science

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Description: This is an excellent phenomenon that can be used in many different units. According to researchers only young sunflowers will follow the Sun. These flowers are following a natural circadian rhythm to receive the most light for photosynthesis. However when they mature the flow

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This is a brief video introduction to the Kea bird and how it has adapted to its environment.

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Kea | Paws for a Minute | PBS LearningMedia

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Learn about Kea-where they live in the wild, features of their habitat, and how their specific physical features and feeding behaviors help them survive.

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Video clip of a truck barreling toward a pole. What will happen to the truck and the pole?

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This site is a curated collection of science phenomena for the NGSS, along with phenomenon based learning resources and help for how to use phenomenon to drive student questions in the classroom centered around 3 dimensional teaching and learning.

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This video demonstrates different types of movements.

It also has many addition resources and videos to help with the concept.

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Changing Motion | Hero Elementary™ | PBS LearningMedia

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In these Hero Elementary activities, children find ways to control how an object moves. They make objects move by pushing or pulling. They push with different amounts of strength, and they aim their pushes in different directions. They make their object bounce off other objects. They use cause-and-effect thinking.

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A video on what humans and animals need.

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What Do Living Things Need? | Rise and Shine: Science Time | PBS LearningMedia

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We all know what we want, but do we know what we need? Join 2019 Arkansas Teacher of the Year Stacey McAdoo as she discovers what living things, like plants and people, need to survive! The worksheet that accompanies this video provides students the opportunity to put their skills to work as they practice determining the needs for living things.

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Video of a sensitive plant. When it is touched it folds up each tiny leaf and then the stalk bends down.

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This site is a curated collection of science phenomena for the NGSS, along with phenomenon based learning resources and help for how to use phenomenon to drive student questions in the classroom centered around 3 dimensional teaching and learning.

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Video shows two tins (look exactly the same) roll down the ramp but at different speeds.

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At the top of the ramp, both tins have identical potential energy, since both have the same mass and are at the same height. At the bottom of the ramp, each tin will have part of its original potential energy appearing as linear (or translational) kinetic energy and the rest appearing as rotational kinetic energy.

Although both tins have the same total mass, each has this mass distributed differently. It's harder to get the tin with distributed mass (washers pushed up against the outer rim) rotating compared with the tin that has its mass concentrated at the center. The tin with its mass at the rim will use more of its original potential energy just to get rolling. Therefore, it has less energy available to appear as translational kinetic energy, resulting in a lower linear speed. So, the tin with its mass concentrated around the rim will lose the race down the ramp, and the tin with its mass concentrated at the center will win.

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Two objects with the same shape and the same mass may behave differently when they roll down a hill. How quickly an object accelerates depends partly on how its mass is distributed. A cylinder with a heavy hub accelerates more quickly than a cylinder with a heavy rim.

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In this video the skateboarding trick called an ‘Ollie’ is demonstrated a number of times in slow motion.

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Description: The Ollie is a difficult trick to perform since the skater is unable to pull on the skateboard. Students could watch this and other tricks and try to identify the pushes and pulls involved. Skateboarding is just one of many sports that students are already doing. They could analyze various sports to identify pushes and pulls.
Web Resources: The Ollie - Wikipedia

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The Ollie - Skateboarding Slow Motion - The Wonder of Science

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Description: The Ollie is a difficult trick to perform since the skater is unable to pull on the skateboard. Students could watch this and other tricks and try to identify the pushes and pulls involved. Skateboarding is just one of many sports that students are already doing. The

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This is a good video on how living things go through a cycle of life.

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Why do things have to ? What a great question that has been asked by many of our Wonder Friends. In fact, it's a question that every human being has surely thought about at one time or another.

At some point in time, every single person comes face-to-face with the reality of his or her . All things that live will eventually . It's a fact of , but it can be hard to face at times. When we lose a beloved pet or a special loved one, the loss can be devastating and difficult to cope with.

So why can't we live forever? There are philosophical and religious aspects to that question that are way beyond the scope of this Wonder of the Day. We can, however, look at some of the , scientific aspects that will shed light on that question. We'll also look at how we might live longer in the future, even if we can't live forever.

Death is an essential part of the of . Whether you're talking about a human being, an animal, or a plant, every living thing comes alive at some point. For humans and animals, the first step in the of is birth.

From birth onward, the cycle is focused on survival. If we survive, we grow and mature. At some point, our bodies begin to age more rapidly until our eventual death ends the cycle.

To survive, most living things need food, water, sunlight, and oxygen. For human beings and animals, these things are usually supplied by our parents until we're able to provide them for ourselves. For human beings, survival is usually fairly easy, and we're able to concentrate on many other enjoyable aspects of .

For some humans, most animals, and nearly every other form of , survival is a day-to-day task that requires effort and energy. Because survival can be such a struggle, the cycle of some organisms is very short. For example, the cycle of a typical can be as short as a week. On the other hand, bristlecone pine trees can live for thousands of years.

Today, adult human beings have a expectancy of 75-80 years. About 200 years ago, that expectancy was only about 35 years. So you can see that we've more than doubled our average expectancy over the past couple hundred years. Advances in medicine and technology have had a lot to do with that. Do you think the next hundred or so years could see another doubling of expectancy ?

Some scientists think so. There are many scientists today who continue to work on solving the problems that cause human beings to age and . As we get older, our bodies eventually wear out. Many times they to various diseases that cause death. Some scientists identify these natural events as problems to attempt to solve scientifically.

For example, can scientists identify the reasons why we age? If so, can they invent ways to stop the aging process? Likewise, can scientists figure out how to eliminate all diseases and health problems that might lead to death?

If you look around at the products available in stores today, not to mention the advances in modern medicine you can see at most hospitals, it's clear that scientists are working hard on these issues. They're also experiencing many successes along the way. Even though true immortality may be a long ways off - and ultimately maybe only the stuff of fairy tales - scientific progress is definitely helping us to live longer lives.

As you ponder these and death issues, it may help also to consider whether you would want to live forever if you could. What would the benefits be? What negative consequences could you imagine? What might Earth look like if no one ever died?

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Today's Wonder of the Day explores why all good things must come to an end.