Age of Rocks

How do we know when animals like this lived?

• We study the fossil, rocks, and other fossils around it.

• We study the rocks it was found in.

• We study the fossils around it

• We check its Facebook bio and see how old it is.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

NGSS.MS-ESS2-3

Which layer is the youngest?

• top

• middle

• bottom

• They are the same age

Tags

NGSS.MS-ESS1-4

Which layer is the oldest?

• top

• middle

• bottom

• sky

Tags

NGSS.MS-ESS1-4

What type of rock is this?

• sedimentary

• igneous

• granite

• Dwayne The Rock Johnson

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Sedimentary rocks are made of tiny rock pieces called ___

Sedimentary rock ___ form when erosion moves sediment to low lying areas such as valleys and lake bottoms.

Tags

NGSS.MS-ESS2-1

Over time, shells and sediment pile up at the bottom of lakes and oceans. These pieces can form rocks, such as

• coquina

• basins

• gypsum

• limestone

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-1

Over very long periods, bodies of water can dry up. As the water evaporates, dissolved substances in the water become solids. This can form sedimentary rock layers, such as ___

• gypsum

• coquina

• basins

• sediment

Tags

NGSS.MS-ESS2-2

After thousands to millions of years, sediment and parts from shelled animals that lived in the past may be compressed and cemented into rocks like this ___

• coquina

• gypsum

• limestone

• sediment

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

What's going on with this starfish?

• He's dead

• He's a happy little starfish

• He's being eaten!

• There is not enough information to answer this question