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 everyday activities such as driving, heating buildings and using aerosols release harmful gases into the air and how it affects the air we breathe.
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. You may even have igneous rocks in your own home!
The hydrosphere encompasses all water on Earth from glaciers and ice to rivers and oceans. People use water every day. This title asks the question, how much do you use? Readers will learn how humans use water, how humans positively and negatively affect water and how to protect the water supply.
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