Biology experiments for children pdf free download. When you think of “living things,” you probably think first of the animals and people you are most familiar with. You might think of your pets-a dog, a cat, a hamster, a canary, a tank of tropical fish-or of the animals in the zoo, or of human animals, your parents and friends. Think about it some more, and you will realize that plants are living, too. You might think of your favorite tree for climbing, of the leaves you gather during fall, or perhaps of the crocuses and snow drops which everyone is so glad to see pushing through the snow in early spring.
Biology experiments for children pdf free download
Remember, too, that many of the inert, lifeless things you use every day originally had life. The wood in your desk came from a tree, as did the paper on which this book is printed. Threads for a pure silk tie or dress were spun by the caterpillars of silk moths. The wool in your winter coat once kept a sheep warm. The coal we burn to provide heat had its origin in giant fern trees which existed millions of years ago, and then disappeared from the earth as its climate changed.
Biology experiments for children pdf free download
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