Chapter 6: The Rock Cycle

Question 1

mineral

Answer 1

A solid nonliving substance that occurs naturally in rocks or in the ground.

Question 2

rock

Answer 2

A solid substance made of one or more minerals.

Question 3

igneous

Answer 3

A type of rock that forms from melted rock that cools and hardens.

Question 4

sedimentary

Answer 4

A type of rock that forms when layers of sediment are pressed together.

Question 5

metamorphic

Answer 5

A type of rock that forms when heat or pressure change an existing rock.

Question 6

rock cycle

Answer 6

The sequence of processes that change rocks from one type to another over long periods.

Question 7

weathering

Answer 7

The breaking down of rocks on Earth’s surface into smaller pieces.

Question 8

erosion

Answer 8

The process of moving sediment from one place to another.

Question 9

humus

Answer 9

The remains of decayed plants or animals in the soil.

Question 10

horizon

Answer 10

A layer in the soil.

Question 11

bedrock

Answer 11

The solid rock that forms Earth’s surface.

Question 12

sand

Answer 12

The largest particles that make up soil.

Question 13

clay

Answer 13

The smallest particles that make up soil.