rocks that form when layers of sediments settle on top of one another and harden | rocks that form from molten rock | rocks that have changed as a result of heat and pressure | |
|---|---|---|---|
igneous | |||
metamorphic | |||
sedimentary |
When lava cools quickly, large crystals form.
Lava from a volcano can flow like a red-hot river or fly from a volcano in hot, gooey globs.
Huge boulders are rocks and so are single grains of sand.
Sedimentary rock cannot change into igneous rock.
In sedimentary rocks, the weight of the layers, sticky clay minerals in the sediment, and natural chemicals do not hold the particles together.
Metamorphic rock can form from sedimentary, igneous and other metamorphic rocks.
Rocks are constantly formed and destroyed.
Rocks can:
Sediments are moved from one place to another by:
Molten rock that has reached the surface is called
Name a type of igneous rock
Name a type of metamorphic rock
In a cliff made of sedimentary rock, is the top or bottom the oldest? Please explain in complete sentences.
Sandstone and slate are used for building, but these rocks have different
properties. Which rock would you use for a roof? Which would you use for
the walls of a building? Explain.