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Posted by on Sep 18, 2017 in Tell Me Why |

What Is Energy?

What Is Energy?

Energy is the power to act. There are several different forms of energy, and one kind can be changed into another kind. But although it can be changed from one form...

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Posted by on Nov 23, 2015 in Tell Me Why |

What Is a Sponge?

What Is a Sponge?

A sponge is an extremely simple kind of water animal with a soft, elastic skeleton. It has no head, mouth, or brain. Sponges hatch from eggs. The baby sponge attaches...

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