Touring Through the Beginning of Earth

On April 22, 1970 over 20 million Americans participated in the first Earth Day. But why? The beginnings of what is now a world-wide event, celebrated in over 190 countries to support environmental awareness and protection, are the focus...

How do you put something as large as the universe in perspective? Use a series of scale experiments. Classmates collaborate around four experiments to examine the scale of the earth-moon system, our solar system, the Milky Way galaxy,...

Ready to begin cell biology in a grand fashion? Start the adventure using a short but thorough video from a vast biology playlist! From prokaryote to eukaryotes, Golgi to chloroplast, the narrator guides viewers through the cell membrane...

In this colorful animation, our current problem with climate change is likened to a block-stacking game of Tetris. Greenhouse gases are increasing in the atmosphere at an increasing rate. Can we place them properly before it's too late?...

Learners arrange various pictures of the Earth to identify its journey through space. In this Earth's rotation lesson, students use models of the Earth and demonstrate its journey through space. Learners complete the worksheet about the...

What is energy, anyway? Use this featurette as an introduction to your middle school energy unit. It successfully touches each of Earth's physical systems, the sun as our main source of energy, and the flow of energy through the food...

Understanding the size of the universe and its many galaxies challenges perceptions, and this visual journey through the universe helps create a scale. Starting from Earth and going out past our galaxy, thus backwards in time, the entire...

For thousands of years people have observed comets as they pass through the solar system, but could there be more to these celestial bodies than meets the eye? Watch this video to learn how these objects have recently been found to...

The toughest animal on Earth is also one of the smallest creatures on Earth. Watch a video about the tardigrade and its ability to withstand many stressors, including lack of water and freezing temperatures.

Learners examine the water cycle. In this hydrologic cycle instructional activity, students follow the provided procedures to demonstrate the how water moves around the planet through the dynamics of the water cycle.