1 / 20

Trilobite Hunter, Part 1

Trilobite Hunter, Part 1. Introduction to the Grand Canyon Earth History, Investigation 8. Rock Hunt. Imagine you are on a field trip to a local quarry with your school. The teacher asks everybody to find the coolest rock they can and bring it back to her.

ollied
Download Presentation

Trilobite Hunter, Part 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Trilobite Hunter, Part 1 Introduction to the Grand Canyon Earth History, Investigation 8

  2. Rock Hunt Imagine you are on a field trip to a local quarry with your school. The teacher asks everybody to find the coolest rock they can and bring it back to her. You and your friend go to opposite sides of the quarry. You both find rocks at the same time and you wave to each other.

  3. Two Rocks Your friend brings back a weird rock that hardly weighs anything and is full of tiny holes. You bring back a grey rock with marks on it that look like a picture of a bug.

  4. Trilobite Fossil Your teacher says,“That’s a trilobite fossil. You can sell that on the internet for a lot of money.”Your friend says, “I want one too. Where should I look?” The teacher answers, “If you want to find fossils, you have to know how rocks form and what kinds of rock have fossils in them.”

  5. Questions Throughout this module, see if you can figure out the answers to these questions: What kinds of rocks are likely to contain fossils? Where should you look for trilobite fossils?

  6. Where to Look There are some places where it's easy to find lots of different kinds of rocks. The tallest mountains and deepest canyons are both great places to look. The Grand Canyon is a really great place to look, because you can see rock layers there that represent millions of years of Earth's history.

  7. Pumice Your friend's rock is called pumice. Let’s go find some pumice in the Grand Canyon and see if we can figure out why your friend's rock doesn't have a trilobite fossil. 7

  8. Compare Rock Types Contrasting Case Activity 1, Part 1 Earth History, Investigation 8 Compare Rock Types 8

  9. Venn Diagram These things are only true about the second rock These things are only true about the first rock These things are true about both rocks Similarities. Rocks of the same type have some things in common. Differences. Rocks of the same type can also be different from each other. Compare Rock Types 9

  10. How to use a Hand Lens What does this word mean? Hold the hand lens so the big circle is very close to your eye. Bring the rock closer and closer to the lens until it pops into focus. Try the same thing with the smaller circles. The magnification is stronger, but you can only see part of the rock at a time. Holding the lens close to your eye will take full advantage of its magnifying power. Compare Rock Types 10

  11. List Observable Features Igneous #11 Igneous #17 What do the rocks look like? How do they feel? Create a table in your lab notebook and list the features you can observe about the two igneous rock samples. Compare Rock Types 11

  12. Which is Which? 11 Can you figure out which rock is granite and which is pumice? 17 Compare Rock Types 12

  13. What’s the same? 11 17 Look at the two cards. Are any of the points exactly the same for both rocks? How would you show this in the diagram? Compare Rock Types 13

  14. Igneous Granite Only Both Granite & Pumice Pumice Only Formed when molten rock cools and hardens Compare Rock Types 14

  15. What else is the same? 11 17 Are any of the points partly the same for both rocks? How would you show this in the diagram? Compare Rock Types 15

  16. Igneous Granite Only Both Granite & Pumice Pumice Only Formed when molten rock cools and hardens Rough and dull Compare Rock Types 16

  17. What is different? 11 17 Identify one thing that is true about granite but not about pumice. How would you show this in the diagram? Compare Rock Types 17

  18. Igneous Granite Only Pumice Only Both Granite & Pumice It is hard and has shiny, smooth crystals Formed when molten rock cools and hardens Most grains are coarse Rough and dull Usually fairly light in color Made of minerals Formed deep beneath Earth’s surface Compare Rock Types 18

  19. What else is different? 11 17 Identify one thing that is true about pumice but not about granite. How would you show this in the diagram? Compare Rock Types 19

  20. Igneous Granite Only Pumice Only Both Granite & Pumice Usually feels lighter than other rocks of its size It is hard and has shiny, smooth crystals Formed when molten rock cools and hardens Grain size is fine to medium Most grains are coarse Rough and dull Contains a lot of small air pockets Usually fairly light in color Made of volcanic glass Made of minerals Formed deep beneath Earth’s surface Formed on Earth’s surface from molten rock released by a volcano Compare Rock Types 20

More Related