Rock Cycle Flexbook Assignment

Rocks formed from the cooling of molten material are _?_.

• igneous rocks
• metamorphic rocks
• sedimentary rocks

Rocks formed from other rocks due to heat and pressure are _?_.

• igneous rocks
• metamorphic rocks
• sedimentary rocks

Rocks formed broken remains of other rocks or organic matter are _?_.

• igneous rocks
• metamorphic rocks
• sedimentary rocks

An igneous rock can change into a metamorphic rock by _?_.

• heat and pressure altering the parent rock
• melting into magma and cooling back into a rock
• by weathering into broken bits and being pressed and glued back into a rock

What is the difference between and intrusive and extrusive igneous rock?

• Intrusive igneous rocks formed by magma cooling slowly inside the Earth where as extrusive is lava cooling above the Earth's surface.
• Extrusive igneous rocks formed by magma cooling slowly inside the Earth where as intrusive is lava cooling above the Earth's surface.
• Intrusive igneous rocks formed by lava cooling slowly inside the Earth where as extrusive is magma cooling above the Earth's surface.
• Fundamentally there is no difference between the two types of igneous rock other than interaction with the hydrosphere.

Why do extrusive igneous rocks usually have smaller crystals than intrusive igneous rocks?

• They cooled at a quicker rate and the crystals did not have a chance to grow large or at all.
• They cooled at a slower rate and the crystals did not have a chance to grow large or at all.

Which process of making a sedimentary rock is the squeezing of sediment together by the weight of sediments on top of them?

• compaction
• cementation

Which process of making a sedimentary rock is the gluing of sediments by the minerals filling in the spaces between the loose sediment particle as water passes through?

• compaction
• cementation

How does layering form in metamorphic rocks?

• If pressure is exerted from one direction, the rock forms layers.
• If pressure is exerted from all directions, the rock usually forms layers.

If you were interested in learning about Earth's history, which type of rocks would give you the most information and why

• Igneous rocks because they are formed by volcanoes and are the most abundant rock type.
• Metamorphic rocks because they are formed from other rocks.
• Sedimentary rocks because they are the most likely to contain fossils.
• All of them, because they would have some information to share.