1. Sedimentary Rocks
(pages 102–106)

2. Objectives 1. Describe how sedimentary rocks form.
2. List and describe the three major types of sedimentary rocks.

3. Sediment Erosion Deposition Compaction Cementation Clastic rock
Word wall
write these down!
Sediment
Erosion
Deposition
Compaction
Cementation
Clastic rock
Organic rock
Chemical rock

4. Question 1
How do sedimentary rocks form?

5. erosion deposition compaction cementation
Objective 1 Most sedimentary rocks are formed through a series of processes:
erosion
deposition
compaction
cementation

6. Sediment is the particles that make up sedimentary rock.
Objective 1

7. Sediment may include pieces of rock, shell, or bone.
Objective 1

8. Most sediment comes from erosion
Most sediment comes from erosion. In erosion, moving water, wind, or ice loosens and carries away pieces of rock.
Objective 1

9. When the moving water, wind, or ice slows down, it drops the sediment
When the moving water, wind, or ice slows down, it drops the sediment. This is called deposition.
Objective 1

10. Layers of sediment build up over millions of years
Layers of sediment build up over millions of years. Newer layers press down on older layers.
Objective 1

11. This squeezes the sediment together. The squeezing is called compaction.
Objective 1

12. Let’s compact a piece of bread and see what happens!
Experiment
Let’s compact a piece of bread and see what happens!
Objective 1

13. Water seeps between sediment particles
Water seeps between sediment particles. Dissolved minerals in the water form crystals.
Objective 1

14. The crystals “glue” the sediment particles together
The crystals “glue” the sediment particles together. This is called cementation.
Objective 1

15. Rock Cycle

16. ?
Small, solid pieces of material that come from rocks or living things are called
sediment

17. ?
Circle the letter of the process that loosens and carries away pieces of rock.
a. compaction
b. erosion
c. deposition

18. List three forces that can carry sediment.
b. _______________
c. _______________
Running water
Wind
Ice

19. ?
Deposition
Cementation

20. Objective 2 There are three major groups of sedimentary rocks: clastic rocks, organic rocks, and chemical rocks.

21. Sedimentary rocks are classified by the kind of sediments they are made of.
Objective 2

22. Clastic rock is made of rock particles
Clastic rock is made of rock particles. The particles can be tiny or huge.
Objective 2

23. Sandstone is clastic rock. Sandstone is made of particles of sand.
Objective 2

24. Organic rock is made of the remains of plants and animals
Organic rock is made of the remains of plants and animals. “Organic” means alive or once living.
Objective 2

25. Limestone is organic rock. Limestone is made of bones and shells.
Objective 2

26. Chemical rock is made of dissolved minerals that came out of solution and formed crystals.
Objective 2

27. Rock salt is chemical rock
Rock salt is chemical rock. Rock salt forms when a solution evaporates and leaves behind crystals of halite. “Natural Crystal Mine – Pakistan”
Objective 2

28. ?
Organic rock
Chemical rock

29. ?
The kind of sedimentary rock that forms from bones and shells is
The kind of sedimentary rock that forms from particles of sand is
limestone
sandstone

30. EXIT TICKET