Earth Materials and Systems
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Air
by Tamra B. Orr
Part of the Earth Materials and Systems series
All living things need air to survive. Air also protects Earth. Discover why air is an important part of nature!
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Water
by Keli Sipperley
Part of the Earth Materials and Systems series
Most of Earth is covered in water. Water falls from the sky as rain or snow. All living things need water to survive. Discover why water is an important part of nature!
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Fossils
by Keli Sipperley
Part of the Earth Materials and Systems series
Plants and animals from millions of years ago left behind fossils. Fossils can teach people about the past. They are also used for fuel. Discover why fossils are an important part of nature!
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Rocks
by Tamra B. Orr
Part of the Earth Materials and Systems series
Different kinds of rocks are found on Earth. Many are found deep inside Earth. Discover why rocks are an important part of nature!
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Erosion
by Tamra B. Orr
Part of the Earth Materials and Systems series
Erosion changes Earth's natural features. It breaks down materials and can help make something new. Discover why erosion is an important part of nature!
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Soil
by Keli Sipperley
Part of the Earth Materials and Systems series
Soil covers most of the land on Earth. It feeds plants and is home to many animals. Discover why soil is an important part of nature!
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