Rocks and Fossils

Deep within the earth there is molten (melted) rock called

• Magma

• Pumice

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NGSS.MS-ESS2-1

When magma comes to the surface or near the surface, it cools down to form rock. This type of rock is called

• Igneous rock

• Sedimentary rock

Igneous rocks can have lots of crystals in them which makes them

• soft and crumbly

• hard and strong

A different type of rock is formed when mud and the bodies of dead creatures

• melts

• sink to the bottom of the sea in layers

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

The layers gradually turn to stone after

• Weeks

• Millions of years

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NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

An example of sedimentary rock is

• sandstone

• slate

Sedimentary rocks are often

• hard and strong

• soft and crumbly

Sometimes Igneous and sedimentary rocks can be changed to make a new kind of rock called

• Metamorphic rock

• Megaheated rock

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NGSS.MS-ESS2-2

Metamorphic rocks are formed when there is a lot of

• ice and snow

• heat and pressure

Some rocks allow water to soak into them. These rocks are said to be

• permeable

• impermeable

Tags

NGSS.MS-ESS2-4