Geologic Time

The Law of Superposition states that

• the older layers of rock are at the bottom

• the older layer of rock are at the top

• the younger layer of rock is at the bottom

• the younger layer of rock is in the middle

Tags

NGSS.MS-ESS1-4

If we want to figure out the age of layers from two different locations what would be the best way to do so?

• We can compare the fossils found in the layers of one location to the fossils in the other location

• We can use the law of superposition to figure out the rate of layer formation

• Radioactive dating to compare the age of the rocks in the layers

• Compare the number of layers in each location

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

What is relative dating?

• used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.

• used to determine the precise age of a fossil by using radioactive dating to measure.

• Order of layers from oldest to youngest

• Used to determine the location of the rocks around the world.

Tags

NGSS.MS-ESS1-4

If Scientist we studying bones of animals that became igneous rock fossils. Why would they use radioactive dating to study the igneous rock?

• It is the easiest method to determine age

• The rate of decay in the rock provide an accurate way to calculate age.

• This method tell them the exact age of the rock which is what they are looking for .

• They would use relative dating instead.

Tags

NGSS.HS-PS1-8

Is fossil creation a natural process?

• Yes

• No

• Sometimes

• what is a fossil?

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers

• Near the bottom of the rock layers

• In the middle of the rock layers

• Somewhat near the surface

Tags

NGSS.MS-ESS1-4

Look at the reference image. Which combination accurately portrays the correct age order?

• B is higher so it is OLDER than D

• C is older than E, even though it is FOLDING upwards

• G is older than all the other layers

• A is higher, so is OLDEST layer

Tags

NGSS.MS-ESS1-4

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers

• The age of fossils

• The relative age of rock layers

• the super powers of squirrels

Tags

NGSS.MS-ESS1-4

What is the relative age of a rock?

• The age determined by the things around it.

• The age of an igneous rock.

• The age determined by radioactive dating.

• The time it takes for 1/2 of the radioactive atoms to decay in an element.

Tags

NGSS.MS-ESS1-4

Traces or remains of organisms that lived long ago

• Fossil

• Unconformity

• Superposition

• Column

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

NGSS.MS-LS4-2