Fossils & Rock Layers

What is a fossil?

• A stone found in the ocean that has formed over millions of years.

• Preserved remains or traces of living things.

• A rock that has a banded material.

Where do most fossils form?

• Near high elevation

• Only in areas where there is a lot of sand

• Near quiet water

Is this an image of a body fossil or trace fossil?

• Body

• Trace

Tags

NGSS.MS-LS4-1

How is a mold fossil different than a cast fossil.

• A mold is an imprint of an organism and a cast is a copy of the imprint.

• A mold is a copy of the imprint that the fossil has made.

• A mold and cast fossil are both the same.

How can you tell the difference between the inside of a bone and the inside of a branch?

• The bone has tiny holes or cavities inside and the branch does not.

• The branch has tiny holes or cavities inside and the bone does not.

• It is difficult to tell because they look similar.

Tags

NGSS.MS-LS4-2

What is the relative age of a rock?

• The true number of years since the rock has formed.

• A rocks age compared to its surrounding rocks.

What is the absolute age of a rock?

• The true number of years since the rock has formed.

• A rocks age compared to its surrounding rocks.

Which layer shows the fossils that are the oldest?

• Layer F

• Layer C

• Layer B

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

Which layer shows the fossils that are the youngest?

• Layer F

• Layer C

• Layer B

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS1-4

How can you tell how old a fossil is?

• Match the color of the rock to the layers in the surrounding area.

• Hit to rock against another rock to see how hard it is.

• You can only tell by using technology

Tags

NGSS.MS-ESS1-4