Rocks and Minerals

How do metamorphic rocks form?

• melted rock cools and hardens

• pieces of rock and other materials squeeze together

• heat and pressure creates a new rock

How do igneous rocks form?

• melted rock cools and hardens

• heat and pressure creates new rocks

• pieces of rock and other materials squeeze together

What is a property that can be seen on this rock?

• It is magnetic.

• It has minerals.

• It has air holes.

• It has cleavage.

What is a property that can be seen on this rock?

• It has no air holes.

• It has no cleavage.

• It is not magnetic.

• It has no minerals.

How can the streak of a mineral be tested?

• Rub it across a tile to see the color of the powder it leaves.

• Rub it against different things to see how easily it can be scratched.

• Break it to see if the pieces are cubes or sheets.

• Shine a bright light on it to see how its surface reflects light.

What property of minerals is measured by scratching the surface of the mineral?

• magnestism

• hardness

• color

• luster

Sally is trying to identify a mineral. She notes that the mineral can easily break into flat sections. What property has she observed?

• hardness

• streak

• luster

• cleavage

How are obsidian, sandstone, and granite similar?

• They all have fossils.

• They all have the same color.

• They are all rocks.

• They are all minerals.

Sam finds a rock that contains a fossil. Which type of rock does Sam most likely have?

• igneous

• metamorphic

• sedimentary

• mineral

Rocks are mostly made of

• minerals

• lava

• fossils

• dirt