Topic 4 Lesson 3

rock that is formed over time by layers of sediment

• sedimentary

• igneous

• metamorphic

• soil profile

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

rock that is formed by cooled and hardened magma or lava

• sedimentary

• metamorphic

• luster

• igneous

rock that is formed inside the Earth by heat and pressure

• limestone

• sedimentary

• metamorphic

• igneous

a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals

• metamorphic

• hummus

• limestone

• luster

a sedimentary rock formed by cementing grains of sand over time

• hummus

• limestone

• sandstone

• igneous

the way a mineral reflects light

• luster

• hummus

• shine

• sediment

Tags

NGSS.MS-PS4-2

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.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

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.

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.