What are rocks made of?
Rocks are made of different minerals and fragments of other rocks.
True or False: Rocks occur naturally.
True
What are fossils?
Preserved remains of dead animals and plants that can be seen in some types of rocks.
What are four properties of minerals?
streak, density, fracture, cleavage, color, crystal structure, luster, and hardness
True or False: All minerals have a crystal structure?
True
True or False: Minerals have different shaped crystals.
True
What is lustre?
Minerals reaction to light. Some reflect a lot of light and others reflect less light.
What is hardness in minerals?
resistance to scratching
What scale is used to determine hardness in minerals?
Mohs hardness scale
How does the Mohs hardness scale work?
It measures hardness based on whether we can scratch a mineral with another mineral, a knife, our fingernails or other material.
