Groundwater Model: Where Does Our Water Come From?

Where does the mass for a growing tree come from? Scholars consider a few different hypotheses and guess which is correct. They then analyze data from different experiments to understand which concepts science supports.

What are we made of and where did all of this stuff come from? From the Big Bang to star dust, the narrator of an entertaining video explores many different theories. Scholars learn the sequence of events that had to occur to create the...

Gold comes from rocks, but rocks can't produce gold—so where does it really come from? The video presents two competing theories of where gold comes from and how it is produced. 

How does the sun give us light and heat? Discover what's really going on inside the centerpiece of our solar system in a brief video. The content includes common misconceptions about the sun's source of energy, how the simple elements...

Was Earth born as a Blue Planet? Discover where water came from with a video from an intriguing science playlist. The resource covers the three most likely origins of water, how scientists differentiate between comet and asteroid water,...

From stately oaks to towering pines, trees are the largest members of the plant kingdom that most people see. But how do trees get so big? Find out where the mass of a tree comes from with a short video. The narrator presents the topic...

It's commonly known that over 70 percent of of the earth's surface is covered by water, but exactly where did it all come from? Join this short video as it travels back to the beginning of the universe in search of the origins of this...

Learners brainstorm on ways they use water, and where water comes from. They view video, Down the Drain, to gain specific facts about water use, properties of water, problems of water and the water cycle. They perform a lab activity...

No, you didn't get your genes from the local clothing store. Learn where they really come from by watching this video as it explores how the genes found in all plants and animals today have arisen over billions of years of mutations from...

Water that leaves the oceans must eventually return. The animations in the final lesson of the four-part NASA series show the complex path water can take across landforms before returning to the ocean. Approximately one-third of the...