Understanding Rocks and Minerals

What is a rock?

• A solid man-made object

• A solid naturally occurring and made of minerals or mineraloid matter

• Any natural object

• A type of plant

What is quartz?

• A type of animal

• A liquid mineral

• A common mineral found in rocks

• A synthetic material

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What can help you identify rocks?

• The rock's taste

• Mineral hardness and visible crystals

• The rock's smell

• The color of the rock

What is not a mineral?

• Opal

• Quartz

• Diamond

• Feldspar

What is the Mohs hardness scale used for?

• Measuring the size of minerals

• Determining the hardness of minerals

• Determining the color of minerals

• Measuring the weight of minerals

What is a mineraloid?

• A naturally occurring mineral-like substance without a crystalline structure

• A mineral that contains water

• A synthetic mineral

• A type of rock

What is true about gemstones?

• All gemstones are minerals

• Gemstones cannot be used in jewelry

• All rocks can be gemstones

• Some gemstones are not minerals

What is coal considered as?

• A plant

• A type of gemstone

• Not a mineral

• A mineral

What is obsidian also known as?

• Volcanic glass

• A type of quartz

• A precious gem

• A sedimentary rock

What is the main difference between a rock and a mineral?

• Rocks can be man-made

• Minerals are not naturally occurring

• Minerals have a definite chemical composition

• Rocks are always hard

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