Rocks and Minerals

How do sedimentary rocks form?

• heat and pressure creates a new rock

• melted rock cools and hardens

• pieces of rock and other materials squeeze together

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 mineral?

• magma that escapes through an opening in the Earth's surface

• small, broken up pieces of rock

• the remains of an animal that lived in the past

• a solid, nonliving material found in nature

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

• It is magnetic.

• It has minerals.

• It has air holes.

• It has cleavage.

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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.

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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.

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

• magnestism

• hardness

• color

• luster

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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

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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.