Minerals and Rocks Unit Week 17 Directions 1.Prepare your desk for science. 2.Use voice level 0 (no voice) to look at notebook pg. 49 & 50 and think about.

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Presentation transcript:

Minerals and Rocks Unit Week 17 Directions 1.Prepare your desk for science. 2.Use voice level 0 (no voice) to look at notebook pg. 49 & 50 and think about what minerals you think you can identify so far.

Targets & Warm Up Targets: Students will use physical properties to identify minerals. Warm Up: Water & Weather Unit test review

Test Review

Homework SubjectHomeworkDue Date ScienceReturn signed test Minerals Quiz Wednesday

Hardness How to test for hardness: – A fingernail has a hardness of 2. – A copper penny has a hardness of 3. – The paperclip has a hardness of 5. Scratched by a fingernail? Scratched by a penny? Scratched by a paperclip? Soft yes Medium noyes Hard no yes or no

Physical vs. Chemical Properties To identify a mineral, scientists test some of its physical properties. A physical property is a characteristic of a substance that can be observed without changing the substance A chemical property is a characteristic of a material that become evident when the material undergoes a chemical reaction or chemical change.

The Acid Test What is the acid test? You can test minerals by putting a small amount of acid on a mineral that you are trying to identify. Minerals that have calcium carbonate (CaCO 3 ) will react when an acid is added to it. Carbon dioxide (CO 2 ) is released and the mineral fizzes. What the acid test tells us: If the mineral fizzes, then the mineral contains calcium carbonate. If the mineral does not fizz, then the mineral does not contain calcium carbonate.

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The Acid Test Video Video 1: Acid test & granite rock (pink and white feldspar, gray quartz, and some black mica) Video 2: Acid test & calcite

Experiment Wrap Up Using what you recorded from your observations and tests, can you identify all 6 minerals?

Reflection Questions How do scientists identify unknown minerals?

Targets (Revisited) Targets: Students will use physical properties to identify minerals.