Books in Reading Essentials in Science. Down to Earth series

Metals are useful and amazing! Find out how they are extracted from ores and how they are made into many items we use every day.

With the amount of energy being consumed, it's no surprise we are in danger of running out of fossil fuels. Fortunately, scientists have found ways to get energy from renewable sources.

Find out about the instruments and people who made the journey into space a reality.

Float down the river and trace this freshwater environment from its source to its mouth. From the banks to the riverbed, many plants and animals call this biome home.

When magma erupts onto the surface of the Earth, the results are explosive.

Dig through the layers of facts about the sedimentary rocks that make up 75 percent of the Earth's surface.

Listen to all of the ways sound and hearing make our world a more meaningful place. Discover pitch, volume, and frequency along the way.

Our world is a colorful bright place thanks to color and light. Our eyes are made up of special parts that help us see both color and light. See how light can be reflected and refracted.

When World War II ended, plastics became an important part of our lives. Today, life--both at play and work--is easier because of this material that we often take for granted.

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Enter the exciting world of fossils. These remains and traces of ancient organisms have led to some amazing discoveries about the evolution of life on Earth.

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