How scientists find out how things work: First a scientist pulls together all the observations about something. Next, he or she thinks up a question that the observations don't explain. Then a hypothesis, that which someone believes to be the correct answer to the question is formed. It must be a statement that can be tested. Next, an experiment is made to test the hypothesis in which everything that happens is written down. Finally the scientist...

How scientists find out how things work: First a scientist pulls together all the observations about something. Next, he or she thinks up a question that the observations don't explain. Then a hypothesis, that which someone believes to be the correct answer to the question is formed. It must be a statement that can be tested. Next, an experiment is made to test the hypothesis in which everything that happens is written down. Finally the scientist...

Explores the sense of smell made possible by the nose as well as its relationship to the sense of taste.

Suggests what to consider when selecting a gerbil for a pet and explains what it needs by way of housing, food, health care, and activities.

Looks at the history of baseball, explaining different positions on a team, the way a field is arranged, and the rules of the game.

Energy is all around us. It's in your house as electricity. It's in your car as fuel. It's in sunlight. It's in the wind. It's everywhere! Energy is the ability to do work. What is work? When you move a thing from one place to another, you do work. Picking up a heavy rock is work. So is moving the pedals on your bike or kicking a ball across the yard.

"Learn all about robots, from how they are designed and built to which exciting new kinds of robots you might see in the future."--

"Learn all about the history of computers, from how they were first invented to how they impact our lives today."--