The First Great Lesson
Where did the stars come from? And the Sun? How was our Earth created? And what about the rest of the Universe?
Course Category: Free
Sedimentation
Why do some mountains have stripes?
Combining and Separating
Why does sand settle to the bottom of the ocean, but salt mixes in? How do people get sea salt out of the sea?
How Did Humans Discover Fire?
When did we start using fire? What 3 components does fire need to burn?