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Rocks
How can rock become bigger and bigger?
Rocks can grow stronger and heavier Metamorphic rocks gain strength when heat and pressure cause their minerals to lock more tightly together. Also, a...
Is composed of weathered rocks and decomposed organic material from dead plants and animals?
Soil consists of weathered rocks, decomposed organic material from dead plants, animals, and bacteria. Soils are often found in layers, with each havi...
What is the age of Earth's oldest rocks?
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously...
Can plants and animals form sedimentryrocks?
Other sedimentary rocks can be formed from deposits secreted by chemical solutions (chemical precipitates), or from deposits made up from the remains ...
Where does igneous rock come from?
Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near ac...
What is the subject of rocks called?
Petrology is the study of rocks - igneous, metamorphic, and sedimentary - and the processes that form and transform them. Mineralogy is the study of t...
What can rocks tell scientists about changes on earth?
Explanation: Rocks tell us a great deal about the Earth's history. Igneous rocks tell of past volcanic episodes and can also be used to age-date certa...
What is the classification of siltstone?
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral co...
Are pet rocks real?
Pet Rocks are smooth stones from Mexico's Rosarito Beach. ... Although by February 1976 they were discounted due to lower sales, Dahl sold over 1 mill...