1 / 24

Do Now – SILENTLY!

Do Now – SILENTLY!. Take out your agenda Sheet, Science folder, packet, and 2 pencils What is a mineral? (Write all 5 characteristics) Draw a picture of a mineral. Look at the following minerals. Which do you think are the same types of minerals and which do you think are different?.

xuan
Télécharger la présentation

Do Now – SILENTLY!

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. Do Now – SILENTLY! • Take out your agenda Sheet, Science folder, packet, and 2 pencils • What is a mineral? (Write all 5 characteristics) • Draw a picture of a mineral.

  2. Look at the following minerals. Which do you think are the same types of minerals and which do you think are different?

  3. HAHA! I tricked you! • These are all the SAME type of mineral! These are all examples of the mineral QUARTZ!

  4. Why is it so difficult to tell minerals apart!? • There are at least 4,000 minerals that we know of in the Earth’s crust • As you can see with quartz, often times the same kind of mineral can look very different! • Therefore, geologists use several types of tests to determine the type of mineral they have found!

  5. How to identify minerals • There are many different ways, but we will explore the main ways!

  6. Today’s objective • Know: Mineral Identification • Show: Explain how minerals are identified by their properties • LOT: Comprehension

  7. How to take notes

  8. Color • Color is the most noticeable characteristic of a mineral. However, it is also the least reliable characteristic.

  9. Color • With the colored pencils at your desk, draw a picture of two different minerals of two different colors (like Quartz)

  10. Streak Streak is the color of the line a mineral makes when it is scraped on a tile. (This is a better clue to a mineral’s identity than the surface color.)

  11. Streak Draw a picture: Fun fact: one way to tell the difference between pyrite (Fool’s gold) and real gold is by streak. Pyrite leaves a greenish-black streak while real gold leaves a yellow streak.

  12. Luster • Luster is the way a mineral reflects light from its surface. The two types of luster are: • Metallic • Non-Metallic

  13. Luster – 2 types! Draw a picture: Metallic: Non-Metallic:

  14. Hardness • Hardness is a measure of how easily a mineral can be scratched. • Measured on Mohs scale 1-10

  15. Mohs Scale – Fun facts! • Your fingernail has a hardness of about 2.5 • A steel file has a harness of about 6.5 • A diamond is the hardness mineral only another diamond can scratch a diamond

  16. Hardness Draw a picture

  17. How a mineral breaks A mineral can break in two ways: • Cleavage: breaks into regular, flat pieces • Fracture: breaks into irregular, jagged pieces.

  18. How a mineral breaks Cleavage Fracture

  19. What are the different ways we can test a mineral?????? There are FIVE major ways!

  20. The tests: • COLOR • LUSTER: Metallic or Non-Metallic • STREAK: color on tile • HARDNESS: Mohs’ scale • How a mineral b-r-e-a-k-s: cleavage or fracture

  21. CFU! • What is the least most reliable of all the properties? Why? • What is the difference between cleavage and fracture? • What would happen if you rubbed a mineral of a Mohs’ value 7 with a Mohs’ value 5?

  22. Let’s Brain Pop! First watchThen fill out the quiz! • http://www.brainpop.com/science/earthsystem/mineralidentification/

  23. CFU • What is the streak test? How do you perform it? • What are the two different types of luster? How do you know which is which? • Challenge question: Any other ideas of how we could test minerals!?!?!!?

  24. How else can we tell minerals apart? • DENSITY! (how tightly packed it is!) • ACID Test! (might form bubbles) • Fluorescence (normal light vs. ultraviolet light)

More Related