Rocks and Minerals

What is Hardness?

• The tendency of a mineral to split easily along flat surfaces.
• A measure of how easily a mineral can be scratched.
• The way a mineral shines, or reflects light.

What is Luster?

• The color of a mineral when it is ground into a powder.
• A measure of how easily a mineral can be scratched.
• The way a mineral shines, or reflects light.

What is a Streak?

• The tendency on a mineral to split easily along flat surfaces.
• A measure of how easily a mineral can be scratched.
• The color of a mineral when it is ground into a powder.

What is an igneous rock?

• Rock that forms when melted, or molten rock from deep below Earth's surface cools and hardens.
• A solid material made up of one or more minerals.
• Rock that forms when existing rocks are changed by heat, pressure, or chemicals beneath the Earth's surface.

What is metamorphic rock?

• Rock that forms when melted, or molten rock from deep below Earth's surface cools and hardens.
• A solid material made up of one or more minerals.
• Rock that forms when existing rocks are changed by heat, pressure, or chemicals beneath the Earth's surface.

What is a rock?

• Rock that forms when melted, or molten rock from deep below Earth's surface cools and hardens.
• A solid material made up of one or more minerals.
• Rock that forms when existing rocks are changed by heat, pressure, or chemicals beneath the Earth's surface.

This rock was found near the mouth of a volcano. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic

This rock was molten lava that cooled quickly as it came out of a volcano. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic

In order for a metamorphic rock to form, _______ is needed.

• Pressure
• Heat 
• Heat and Pressure
• Weathering

What are 3 properties that are used to identify minerals?

• luster, color and sound
• smell, color and hardness
• luster, color and hardness
• luster, smell and hardness