Rock Cycle 6th grade 2025

In order for a metamorphic rock to form, _______ is needed.

• Pressure

• Heat 

• Heat and Pressure

• Weathering

Answer explanation

Metamorphic rocks form under conditions of high heat and pressure, which alter existing rocks. Therefore, the correct answer is 'Heat and Pressure', as both are essential for the metamorphic process.

This rock was another type of rock that was heated and compressed over time. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

The rock described is a metamorphic rock, formed through the heating and compression of existing rocks over time, altering their structure and mineral composition.

This rock was formed by smaller pieces of rock that settled at the bottom of a lake millions of years ago. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

This rock is classified as sedimentary because it formed from smaller pieces of rock that settled at the bottom of a lake over millions of years, indicating a process of deposition and compaction.

Tags

NGSS.MS-ESS1-4

This rock started as lava that cooled and then was heated and compressed over time. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

This rock is classified as metamorphic because it originated from lava that cooled into igneous rock and then underwent heating and compression over time, transforming it into a different type of rock.

Tags

NGSS.MS-ESS2-1

This rock was formed by lots of fossils that settled on top of each other over time. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

This rock is classified as sedimentary because it is formed from the accumulation of fossils and other materials that settle in layers over time, distinguishing it from igneous and metamorphic rocks.

Tags

NGSS.MS-ESS1-4

This rock used to be the bottom of an ocean millions of years ago. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

This rock is sedimentary because it formed from the accumulation of materials at the bottom of an ocean. Sedimentary rocks often contain fossils and are created through processes like compaction and cementation.

Tags

NGSS.MS-ESS1-4

This rock started as molten magma. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

This rock is classified as igneous because it originates from molten magma. When magma cools and solidifies, it forms igneous rock, distinguishing it from sedimentary and metamorphic rocks.

Tags

NGSS.MS-ESS2-1

This rock was layers of fossils that were buried, heated, and compressed over millions of years. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

This rock is classified as metamorphic because it was formed from layers of fossils that were buried, heated, and compressed over millions of years, transforming it from its original sedimentary state.

Tags

NGSS.MS-LS4-1

Wind and water have eroded this rock to show the layers of sediment that were laid down millions of years ago. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

The rock shows layers of sediment, indicating it was formed from accumulated particles over time. This process is characteristic of sedimentary rocks, making 'Sedimentary' the correct answer.

Tags

NGSS.MS-ESS1-4

This rock was found near the mouth of a volcano. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

Answer explanation

The rock found near a volcano is igneous because it forms from the cooling and solidification of magma or lava. Sedimentary rocks form from the accumulation of sediments, while metamorphic rocks arise from the alteration of existing rocks under heat and pressure.

Tags

NGSS.MS-ESS2-1