Discusses the importance of trees as sources of food, oxygen, and other essential things.

"Explains how leaves change their colors in autumn and then separate from the tree as the tree prepares for winter."--Title page verso.

Even though Mount Everest measures 29,028 feet high, it may be growing about two inches a year. A mountain might be thousands of feet high, but it can still grow taller or shorter each year. Mountains are created when the huge plates that make up the earth's outer shell very slowly pull and push against one another. Read and find out about all the different kinds of mountains. The earth's continents rest on plates that move slowly across our planet's...

Read and find out about one of nature's most mysterious forces-the earthquake. Some earthquakes are so small that you don't even feel them, while others can make even big buildings shake! Learn why earthquakes happen, where they are most likely to occur, and what to do if one happens near you.

Presents how oil is used currently, what alternatives can help us use less oil energy in the future, and the impact of oil use on the environment.

A lively introduction to the rainforest combines illustrations and diagrams with explanations about the abundant plant and animal life that can be found there.