Rock Dating

A missing layer of rock is a/an:

• idex fossil

• unconformity

• isotope

• intrusion

Tags

NGSS.MS-ESS1-4

In which direction are sedimentary rock layers deposited?

• horizonal

• diagnal

• verticle

• in a cross

Which law do we use to figure out the relative age of undisturbed layers?

• Law of Conservation of Energy

• Law of Superposition

• Law of Relativity

• Law of Gravity

Tags

NGSS.MS-ESS1-4

What would we see if a rock layer formed before a fault happened?

• The rock layer would be above the fault

• The fault would cut through the rock layer

• The rock layer would be an unconformity

• The rock layer would be folded

Why is superposition important to geologists who are trying to understand the evolution of Earth over time?

• It describes how rocks have always stayed the same

• It describes the evolution sequence as rocks are laid down diagonally

• It describes the evolution of rocks as they go through the rock cycle

• It indicates the relative ages of rock layers and the fossils in them

Tags

NGSS.MS-ESS1-4

The process in which an unstable isotope becomes stable is:

• folding

• indexing

• radiometric dating

• radioactive decay

Tags

NGSS.HS-PS1-8

What does the term half-life mean when using radioactive dating to determine the age of fossils

• The amount of time it takes for half of a radioactive substance to decay

• The amount of time it takes for a fossil to become radioactive

• The amount of geologic time represented by half of a horizontal layer

• The amount of time it takes for an organism to fossilize in radioactive sediment

Tags

NGSS.HS-PS1-8

Which statement describes the principle of superposition

• Rock layers are laid down horizontally

• A rock body containing fragments of another must be younger than the fragments

• The oldest sedimentary rock layers are at the bottom

• A break in a rock layer must have happened after the rock layer was already there

Tags

NGSS.MS-ESS1-4

Locate the unconformity just below layer H. Which of these happened immediately before it?

• I

• P

• L

• M

Tags

NGSS.MS-ESS1-4

Niko shook 100 pennies in a container and counted how many landed heads up. Approximately what fraction of pennies would you expect to land heads up?

• 1/4

• 1/8

• 1/2

• 1/16