The Rock Cycle

Ms. Sikes

Rock Cycle

• Continual process by which new rock forms from old rock

3 types of rock1. Igneous: formed from cooling magma

1. Can be intrusive (formed inside the earth or extrusive (formed on the surface of earth)

2. Sedimentary: formed from layers being smushed together (usually under water)

3. Metamorphic: changed by heat and pressure (usually formed under the earth’s surface)

Important Vocab

• Weathering: when water, wind, ice and heat break down rock

• Erosion: the process by which wind, water, ice or gravity transports soil and sediment from 1 place to another

• Depostion: when sediment is is deposited (laid down) somewhere

The Rock Cycle

• Can start at any point

• Must go in order

The Rock Cycle

• 1:Rock that is buried under ground melts because the center of the earth is so hot.

• 2: magma rises and cools off = solidifies into IGENOUS ROCK (this can happen during a volcanic eruption)

The Rock Cycle

• The Igneous rock is weathered away over time. Erosion takes the sediment to other places and deposits them somewhere else like the ocean

• The water compacts the pieces into SEDIMENTARY ROCK

The Rock Cycle• When Earth’s plate’s collide,

some of Earth’s crust is forced down.

• It’s HOT down there!

• The heat and pressure squeeze the rock and change it to METAMORPHIC ROCK.

• Then it starts all over again…

See Rock Cycle on page 362

• Draw it in your notebook

Scenarios

• 1. Sediment is washed to the bottom of the ocean. What type of rock is formed?

• 2. Sedimentary rock falls through the cracks when the plates move and collide. What happens to this rock?

3. A volcano erupts and magma spills out. What will happen to this magma? What type of rock is formed?

• 4. Igneous rock undergoes lots of heat and pressure. What kind of rock does it turn in to?