We all work to get the things we need. Some of us grow our own food and make our own clothes. Some of us work for money to buy these things. In this book, you will discover some of the ways we earn a…
Most scientists think that the first tiny sea plants made it possible for life to come onto the land. To live, plants and animals must take in a gas called oxygen. The tiny sea plants and animals of…
There’s something I’m rarely without. My supply of it doesn’t run out. I use it, yet there’s more, and to spare. It’s something I like to share. It’s with me wherever I go. What is it? Do you…
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