Rock and Mineral Review

Which of the following minerals is known for its hardness of 10 on the Mohs scale?

• A. Quartz

• B. Talc

• C. Diamond

• D. Topaz

Which type of rock is formed from the cooling and solidification of magma or lava?

• A. Sedimentary

• B. Metamorphic

• C. Igneous

• D. Organic

True or False: Granite is an example of a sedimentary rock.

• A. True

• B. False

What is the main difference between intrusive and extrusive igneous rocks?

• A. Intrusive rocks form outside the Earth, while extrusive rocks form inside.

• B. Intrusive rocks cool quickly, while extrusive rocks cool slowly.

• C. Intrusive rocks cool slowly, while extrusive rocks cool quickly.

• D. There is no difference; they are the same.

True or False: Sedimentary rocks often have a layered appearance because they form from the accumulation and compression of sediments over time.

• A. True

• B. False

If you find a rock with visible crystals and a coarse texture, which type of igneous rock is it most likely to be?

• A. Basalt

• B. Obsidian

• C. Granite

• D. Pumice

You are analyzing a rock sample and find that it contains fossils. What type of rock is this most likely to be?

• A. Igneous

• B. Metamorphic

• C. Sedimentary

• D. Mineral

Which mineral property would be most useful in identifying a mineral that is very shiny and metallic?

• A. Hardness

• B. Streak

• C. Luster

• D. Cleavage

Given that a rock sample has a foliated texture and is formed under high pressure and temperature, what type of rock is it?

• A. Granite

• B. Basalt

• C. Schist

• D. Sandstone

Which of the following best describes a method for comparing the hardness of two mineral samples using the Mohs hardness scale?

• A. Use a chemical test to determine which mineral dissolves faster in an acid solution.

• B. Scratch each mineral sample with a set of reference minerals and note the highest mineral that can scratch each sample.

• C. Measure the density of each mineral sample and compare their weights.

• D. Observe the color of each mineral and compare their hues.