1. O: You will be able to explain rocks and the rock cycle.
Do Now: take out your pre-test.

2. Rocks
Scientists define rock as a naturally occurring solid mixture of one or more minerals and organic matter.
Rocks are always changing.
The Earth recycles rocks.

3. Uses of rocks.

4. What shapes the Earth?
Erosion
Deposition
Weathering

5. Weathering
The process in which water, wind, ice, and heat break down rock is called weathering.
Weathering is important because it breaks down rock into fragments.

6. Erosion
The process by which sediment is removed from its source is called erosion. Water, wind, ice, and gravity can erode and move sediments and cause them to collect.
Sediment is another name for small pieces of rock, dirt, or dust.

8. Deposition
The process in which sediment moved by erosion is dropped and comes to rest is called deposition.
Sediment is deposited in bodies of water and other low-lying areas. In those places, sediment may be pressed and cemented together by minerals dissolved in water to form sedimentary rock.

9. The Rock Cycle
Rocks are constantly changing into new things, this process is called the rock cycle.

11. Homework
1. Why are rocks important to us? Give at least three reasons.
2. How does weathering shape the Earth’s surface?
3. What is the difference between erosion and deposition?
4. Why is it called the rock cycle?

12. O: You will be able to identify the three main types of rocks.
Do Now: What are the three main types of rocks? What makes them different?

13. Three Main Types of Rocks
Sedimentary
Igneous
Metamorphic

14. Sedimentary Rocks Formed from the pieces or sediments of other rocks.
The weight and pressure causes them to bond together.
You can see the little pieces that form it and they keep their properties.

15. Igneous Rocks Igneous comes from the Latin word for fire.
Igneous rocks are formed from cooling magma.
There are a couple different types of Igneous rocks.

16. Metamorphic Rocks
Metamorphic rocks undergo a chemical change and turn into a whole rock.
They form under intense heat and pressure.

18. How are rocks classified?

19. The size, shape, and positions of the grains that make up a rock determine a rock’s texture.

20. Homework
1. What type of rock do you think that there is the most of? Why?
2. Why can sedimentary rocks look very different than other sedimentary rocks?
3. Why do scientists look at composition and texture of rocks?