8.E.2: Landforms

The radioactive isotope content of a rock can be used to identify which property of the rock?

• the total mass of the rock

• the rate at which the rock formed

• the types of fossils that the rock contains

• the amount of time passed since the rock formed

Tags

NGSS.HS-PS1-8

Which method would be BEST for scientists to use to determine the absolute age of a Precambrian igneous rock?

• index fossils

• law of superposition

• radiometric dating

• law of original horizontality

Which of these would help determine the changes in a plant species over geologic time?

• examining the number of plants in a given area

• examining the type of animals that eat the plant

• examining the type of seeds the plant produce

• examining the fossil record of the plant

Tags

NGSS.MS-LS4-1

Geologists frequently use mass spectrometers in determining the relative age of rocks. A spectrometer can differentiate between the ratios of isotopes in rock samples and calculates the radioactive decay involving what two isotopes?

• uranium - lead

• rubidium - strontium

• potassium - argon

• uranium - strontium

Paleontologists are scientists who study evidence of past life on Earth. Which method do paleontologists MOST likely use to determine the forms of life that existed millions of years ago?

• interview older scientists

• examine fossils records

• research past species in the library

• examine current species of plants and animals

Tags

NGSS.MS-LS4-1

During which era of geologic time did the first humans appear?

• Precambrian

• Mesozoic

• Cenozoic

• Paleozoic

According to the law of superposition, which layer is the youngest?

• A

• B

• C

Tags

NGSS.MS-ESS1-4

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

Which of the following correctly lists the layers in order from oldest to youngest?

• A, B, C, D, E

• E, D, C, B, A

• E, B, C, D, A

• C, B, A, D, E

Tags

NGSS.MS-ESS1-4

Which is used in radioactive dating?

• law of superposition

• index fossils

• carbon-14

• geologic time scale