Rock Layers: Sedimentary, Metamorphic, & Igneous Rocks

Rock Layers:

Sedimentary, metamorphic, & Igneous rocks

Multiple Choice

Which of these is made from rock?

• Counter Top

• CDs / DVDs / Blu Rays

• Corpse Flower

• Rock Candy

Open Ended

Explain what a rock is in one sentence.

Open Ended

Where do rocks come from?

Sedimentary rocks form when sediment, made of small bits of rock, is pressed and cemented together. They often form in flat layers.

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​Sedimentary Rock

(sedimentary = pressure)

​sandstone

​limestone

shale

Metamorphic rocks form when intense heat and pressure are applied to existing rock. The new rocks can be very dense and have bands or stripes.

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metamorphic Rock

(metamorphic = heat & pressure)

​marble

​diamond

gneiss

Igneous rocks form from the cooling of melted rock. They may form on or near the surface or deep underground.

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igneous Rock

(igneous = extreme heat)

​pumice

granite

obsidian

Match

Match the vocab word to it's definition

• n. the principle that newer layers of sedimentary rock form over older layers

• n. rock that forms when small pieces of solid matter, or sediment, are squeezed and cemented together

• n. rock that forms from the cooling of melted rock

• n. rock that has been changed by intense heat and pressure

Law of Superposition

Sedimentary Rock

Igneous Rock

Metamorphic Rock

• Law of Superposition

• Sedimentary Rock

• Igneous Rock

• Metamorphic Rock

Drag and Drop

The type of rock called ​

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forms in flat layers. The Law of ​

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states that newer layers form on top of older layers. Later, flat layers can be tilted or twisted by ​

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Drag these tiles and drop them in the correct blank above

SEDIMENTARY

SUPERPOSITION

FORCES FROM EARTH'S INTERIOR

Multiple Choice

This photograph shows rocky cliffs. A scientist explains the layers of rock by citing the Law of Superposition.

Which observation supports this explanation?

• The layers are flat and horizontal.

• The layers are different colors.

• There are at least 20 layers.

• Lower layers appear wider than upper layers.