Nitrogen, oxygen, argon, and carbon dioxide are all gases in Earth's atmosphere. But what happens when there is too much or two little of a certain gas? Readers will learn how every day activities suc
"Sedimentary rocks are all around you. They form from soil, gravel, dust, and other sediment. This type of rock is often affected by wind and water erosion. Learn how this can change an area's landsca
Did you know rocks could go through metamorphosis? Intense heat or pressure changes the form of metamorphic rocks. This type of rock is the oldest found on Earth. Find out where metamorphic rocks are
"Did you know igneous rock is formed as a result of volcanic activity? This type of rock is made up of minerals. Find out more about minerals, where igneous rocks form, and what purposes they serve. Y
Describes how humans have negatively impacted Earth's environment with pollution and mining for nonrenewable resources, and details why solar, wind, and geothermal energy may help restore the balance.
