Solar Energy
Solar Energy Solar Energy Imagine a source of energy more powerful than a million electric…
The Environment
Recycling
Recycling Recycling Think of all the things you throw away: juice bottles, soda cans, cand…
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Rain Forest
Rain Forest Rain Forest Where would you go to find more kinds of plants and animals than a…
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Population
Population Population Can you guess how many people there are in the world? It’s a big num…
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Pollution
Pollution Pollution In the mid-1900s, a biologist named Rachel Carson was afraid that some…
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Plants
Plants Plants They grow on mountains and in deserts. They grow in freshwater lakes and str…
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Photosynthesis
Photosynthesis Photosynthesis Plants need sunlight. Houseplants lean toward the Sun, and if…
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Oxygen
Oxygen Oxygen If an astronaut strikes a match in space, nothing happens. On Earth the tip …
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Leaves
Leaves Leaves Leaves are a plant’s food factories. Plants make their own food in a process…
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Mushrooms
Mushrooms Mushrooms Have you ever eaten a mushroom? How? On pizza? In salad? Maybe you had…
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Ice Age
Ice Age Ice Age You know what kind of weather to expect at each time of year, at least for…
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