DO NOW HW due Friday 9/9!

Transcription

1 DO NOW HW due Friday 9/9! 1. What are 6 characteristics used to identify a mineral? 2. What are the four things something must be in order to be considered a mineral? 3. What is luster? 4. If a mineral breaks and has jagged edges, does that mineral have cleavage or fracture? 5. What is streak? How can it help us to tell the difference between fools gold and real gold?

2 Do Now

3 Today s Lesson: By the end of class today, all SWBAT define what sedimentary rocks are based on their characteristics and explain how they are formed with at least 80% accuracy. Today s Skill: After this class, you should be able to: explain the steps on how sedimentary rocks are formed and identify sedimentary rocks based on their characteristics.

4 Sedimentary Rocks

5 What is a rock? It is: Naturally formed Solid Mixture of one or more minerals It is not: A pile of sand (b/c the pieces are not packed together) A tree because it is a living thing

6 See if you were right!: BrainPop (start at 1:29 seconds) em/typesofrocks/

7 Sedimentary Rock This is a type of rock that is formed by the deposition of material at the Earth's surface and within bodies of water. Sediments are small pieces of dust, mud, rock, sand and shells. They can sweep into oceans and rivers and settle to the bottom

8 Sedimentary Rock Over a long period sediments form layers hundreds of meters thick. The layers press on one another, which causes the sediment to form a kind of rock

9 Formation of Sedimentary Rocks It s a step by step process! STEP 1. Weathering is when rocks are broken into little pieces called sediments STEP 2. Erosion is when sediments move from one place to another STEP 3. Deposition is when sediments settle down somewhere on earth s surface and stop moving around (think of depositing money in the bank!) STEP 4. Compaction is when sediments are squeezed together STEP 5. Cementation is when sediments start sticking together and make a sedimentary rock

10 Sedimentary RAP Weathering breaks it down Erosion moves it around Deposition let it drop Compact & cement will make it ROCK!

11 Check For Understanding What are the steps in the process of formation of sedimentary rock?

12 Real Life: The Grand Canyon (Arizona, USA)

13 Characteristics of Sedimentary Rocks LAYERS! Deposition after deposition means that you get lots of layers Fossils! Since they are formed above the earths surface, sedimentary rocks can sometimes contain fossils. This makes them unique. Mix of particles Because lots of different rock types can be brought over by erosion, there are different rock types in one sed. rock Smooth, rounded edges. Because of weathering and erosion, sedimentary rocks are usually quite smooth.

14 Flat Layers

15 Mix of Particle Size

16 How do you know that this is Sedimentary?

17 Fossils Fossils! Since they are formed above the earths surface, sedimentary rocks can sometimes contain fossils. This makes them unique. 4

18 1. An ocean with fish covers the land. 2. The fish dies and 3. The fish is now a fossil. sediment begins to burry its The reptile has died and remains. The ocean dries been buried by sediment. A up. And reptiles now roam monkey now lives on the the land. land.

19 Youngest Oldest

20 Check For Understanding! Where would you find the fossils of the oldest animals?

21 Characteristics of Sedimentary Rocks Smooth, rounded edges This is because of weathering and erosion

22 Catalyst HW DUE TUESDAY 9/2!!! 1. What are the 5 steps to form a sedimentary rock? Explain each step. 2. What are the 6 characteristics to identify a mineral? 3. What are the four things something must be in order to be considered a mineral? 4. Where are the oldest fossils found? Where is the oldest layer of a sedimentary rock found?

23 Pre Lab- Observations

24 Inquiry Lab Create your own Sedimentary Rock! Each table will be given a set of materials DO NOT TOUCH MATERIALS UNTIL INSTRUCTED Follow the directions on the lab sheet to create your sedimentary rock!

25 Examples of Sedimentary Rocks Sandstone- as the name suggests, it is made of grains of sand; often oil is found beneath layers of sandstone Shale-also known as mudstone ; usually found near slowly moving water Limestone- made of dead organisms and/or their shells; often found in shallow waters Coal- made from the carbon in dead plants; can be burned for energy

26 Exit Ticket