Rocks

Rock is a natural, solid mixture of ________ or grains.

Scientists use the _____ and _____ of the rocks to classify them.

• shape and ize

• texture and composition

• texture and color

• color and grains

Which of the pictured rocks has the most rough-grained texture?

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Which best describes a mineral?

• 1. organic solid

• definite chemical composition

• 1. a combination of rocks

• only found in the ocean

Which type of rock is formed by depositing particles from a stream?

• granite

• igneous

• metamorphic

• sedimentary

What type of rock is formed by heat and pressure?

• sandstone

• limestone

• metamorphic

• sedimentary

Why is the term cycle used when referring to the rock cycle?

• 1. The rock cycle has wheels.

• The rock cycle produces rocks that are round in shape.

• 1. The rock cycle is a series of processes with no starting or ending point.

• The rock cycle is applied to only one type of rock.

Which label on the diagram indicates magma?

• label A

• label B

• label C

• label D

Which process produces igneous rock from lava?

• 1. cooling

• 1. heating

• 1. erosion

• 1. deformation

Which extrusive rock forms so quickly that no crystals form?

• 1. lava

• 1. obsidian

• 1. magma

• 1. pumice