Chapter 10 - Matter and Its Changes
Did you know miners must dig up and process as many as 30 tons of rock to make a single gold ring? Take a dazzling look at how gold is mined and transformed.
What happened after the Big Bang? This comic strip explains the interactions that lead to the creation of stars, planetary nebulas, and supernovas.
Did you know that all of the mined gold in the world could easily fit inside your school's gym? Find out what it takes to turn this precious metal into trophies and jewelry.
If you've spent even a few hours in a pool, you know that the deep end is colder than the shallow. But do you know why? Experiment with colored ice cubes for insight into water density.