Rocks and Mineral Composition Lesson

When and how do metamorphic rocks form?

• When lava is released from volcanoes, the lava cools and becomes rock.

• When sediment is deposited in layers, the sediment sticks together and becomes rock.

• When rock is worn away by rainfall, the particles collect on flat surfaces.

• When heat and pressure act on rock, the rock changes form.

Which statement best describes how sedimentary rocks form?

• They form from molten rock, or magma.

• They are squeezed under heat and pressure until new crystals form.

• They form inside Earth's crust.

• They form as sediment collects in layers that become stuck together.

The diagram shows the rock cycle. The rock cycle shows the changes from one type of rock to another. Based on the evidence shown, which two changes can occur to a metamorphic rock?

• Heat and pressure can change metamorphic rock to sedimentary rock.

• Metamorphic rock can melt and become magma.

• Metamorphic rock can become compacted and cemented and turn into igneous rock.

• Metamorphic rock can wear away and much later form sedimentary rock.

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NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Roberto’s teacher gave him a sample of a mineral. She asked Roberto to make observations of the sample and identify some of its properties. What is the description for hardness?

• The sample is easily scratched with a fingernail.

• When rubbed on a plate, the sample leaves a white mark.

• The sample has a waxy or greasy appearance.

• When broken, the sample breaks into flat layers.

Roberto’s teacher gave him a sample of a mineral. She asked Roberto to make observations of the sample and identify some of its properties. What is the description for streak?

• The sample is easily scratched with a fingernail.

• When rubbed on a plate, the sample leaves a white mark.

• The sample has a waxy or greasy appearance.

• When broken, the sample breaks into flat layers.

Roberto’s teacher gave him a sample of a mineral. She asked Roberto to make observations of the sample and identify some of its properties. What is the description for luster?

• The sample is easily scratched with a fingernail.

• When rubbed on a plate, the sample leaves a white mark.

• The sample has a waxy or greasy appearance.

• When broken, the sample breaks into flat layers.

Roberto’s teacher gave him a sample of a mineral. She asked Roberto to make observations of the sample and identify some of its properties. What is the description for cleavage?

• The sample is easily scratched with a fingernail.

• When rubbed on a plate, the sample leaves a white mark.

• The sample has a waxy or greasy appearance.

• When broken, the sample breaks into flat layers.

Which of the following minerals best fits the properties of Roberto’s sample?

• silver

• talc

• diamond

• magma

The material in the soil that makes this garden plot best for plant growth is ___________________________.

• air

• sand

• rock

• humus

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

The garden plot in which vegetable plants would grow best is ______________________.

• Profile 1

• Profile 2

• Profile 3

• Profile 4

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-3