508 Rocks

What determines the group a rock belongs to?

• The kinds of minerals it is made of

• The color of the rock

• How the rock was formed

• The size of the rock

What are igneous rocks formed from?

• Cooled magma

• Layers of plant remains

• Heat and pressure

• Animal remains

Which type of rock is formed due to heat and pressure?

• Sedimentary rock

• Igneous rock

• Metamorphic rock

• Volcanic rock

What forms the layers in sedimentary rocks?

• Molten magma

• Heat and pressure

• Plant and animal remains

• Minerals

How many groups of rocks have scientists identified?

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