Rock Cycle and Metamorphic Processes

What are the three main types of rocks?

• Hard, soft, and brittle

• Sedimentary, igneous, and metamorphic

• Large, medium, and small

• Smooth, rough, and jagged

What process breaks down rocks into tiny pieces on the Earth's surface?

• Melting

• Erosion

• Pressure

• Compaction

What happens to rock fragments over time to form sedimentary rocks?

• They melt into magma.

• They are broken down further by heat.

• They build up in layers and are fused together by pressure.

• They are carried away by wind and water.

What is a common characteristic of sedimentary rocks?

• They have a uniform structure throughout.

• They are always black and shiny.

• You can often still see pieces of the original rocks or sediment.

• They are formed from superheated magma.

In the jelly bean demonstration, what did the honey and cornstarch represent?

• The heat that melts rocks.

• The pressure that compacts rocks.

• The bonding agents that hold rock pieces together.

• The wind and water that break down rocks.

What two main factors cause a rock to become a metamorphic rock?

• Wind and water

• Erosion and melting

• Heat and pressure

• Cooling and solidification

Which of these is NOT a source of heat and pressure that forms metamorphic rocks?

• Friction from the Earth's shifting crust

• Pressure deep within the Earth

• Radioactive decay

• Cooling of magma on the Earth's surface

What happens to the structure of a rock when it becomes metamorphic?

• It completely disappears.

• It takes on a new form, but original components might still be visible.

• It turns into a liquid called magma.

• It breaks down into tiny sediments.

What is magma?

• Rock fragments on the Earth's surface.

• A type of sedimentary rock.

• Melted rock deep within the Earth.

• Rock that has been changed by heat and pressure.

How are igneous rocks formed?

• By wind and water breaking down rocks.

• By heat and pressure changing rock structure.

• By magma rising and cooling.

• By layers of sediment building up.