The earth is made of , rock., Rock is made of, minerals., Minerals are, sold, nonliving matter found in nature., Rocks can be as small as, a grain of sand., Rocks can be as tall as a , skyscraper., Meteorites , are rocks from space that crash on to earth., Geologist are scientists, who study rocks., Igneous rocks form when, hot, liquid rocks cool., Sedimentary rocks form when, layers of minerals pile up., Metamorphic rocks form when, pressure and heat change the make up of a mineral., Rocks are always, changing., Rocks changing is called, The Rock Cycle, The top layer of Earth is called , the crust., People have been building with rocks , for thousands of years., Some birds swallow rocks because, they don't have teeth., Fossils are, what is left of animals or plants that lived a long time ago., Soil , is made up of tiny pieces of rock., The rock mixes with air, water, and humus , to make soil., Nutrients are, healthy "food" to help plants and people be healthy..

Rocks!

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