7.2.6 Geologic Time Scale

a fossil found in a narrow time range but widely distributed around the earth; used to date rock layers.

• Petrified

• Mold

• Cast

• Index

• Trace Fossil

Tags

NGSS.MS-ESS1-4

fossilized mark that is formed in soft sediment by the movement or actions of an animal.

• Petrified

• Mold

• Cast

• Index

• Trace Fossil

According to paleontologists, how old is the Earth?

• 3.5 Billion Years Old

• 543 Million Years Old

• 57 Million Years Old

• 4.6 Billion Years Old

Tags

NGSS.MS-ESS1-4

looks at where the fossil is located to determine its age relative to other fossils.

• Relative Dating

• Absolute Dating

Tags

NGSS.MS-ESS1-4

Uses radioactive elements near the fossils to determine the actual age of the fossils.

• Relative Dating

• Absolute Dating

Tags

NGSS.HS-PS1-8

Analyze the layers of undisturbed sedimentary rock. Which layer of sedimentary rock is oldest?

• Q

• R

• S

• T

• U

Tags

NGSS.MS-ESS1-4

As a part of an investigation, some scientists excavated rocky layers in an area. They found some rock samples with ancient fossils embedded in them.

What tool would help the scientists view the fossilized rock in more detail?

• a color filter

• a magnifying glass

• a meter stick

• a triple-beam balance

Preserved remains of plants and animals from the remote past are called?

• Sedimentary rocks

• Radioactive dating

• Decayed organisms

• Fossils

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The Law of Superposition states

• Younger rocks layers are on top of older rock layers

• Fossils are found in sedimentary rocks

• Older rock layers are on top of younger rock layers

• Absolute age dating

Tags

NGSS.MS-ESS1-4

Saying you are older than your sister is an example of?

• Absolute age dating

• Relative age dating

• Fossils

• Radioactive dating