When an unstable radioactive atom decays, it usually turns into:

the exact same atom but with less pure energy

Potassium-40 is useful for radioactive dating of Earth's rocks because the half-life of potassium-40

remained constant during the radioactive decay process

decreased as the amounts of 40 Ar and 40 Ca in the rock increased

increased as pressure from the overlying sedimentary rock increased

was shortened by the high temperature of the magma that formed the rock

Radioactive dating Quiz: 26 Practice Questions

26 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The time it takes for half of a radioactive element's atoms to decay is its:

Era

Half life

Relative age

Absolute age

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Index fossils are used to determine:

How old a rock layer is

How organisms in the past were related to each other

The composition of a rock layer

Which rock layers in different areas are the same age

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A geologist hiking through the woods in Ohio finds rocks containing fossils in a stream bank. The fossils look similar to animals currently living in the ocean. Which conclusion should the geologist make based on the discovery of these fossils?

Fossils washed upstream from the ocean

Animals that live in the stream today lived in the ocean long ago.

The area of the woods and stream was an ocean long ago.

The area with the stream will become part of the ocean in the future.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is 'half-life'?

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.

What is radio active decay?

The preserved remains of an organism.

Atoms in an unstable element break down to form another element.

When things die and their remains are buried.

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

What does radio active dating works best to determine?

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.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of fossil is this?

Mold

Cast

Preserved remains

Trace fossil

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Radioactive dating

The time it takes for half of a radioactive element's atoms to decay is its:

Index fossils are used to determine:

A geologist hiking through the woods in Ohio finds rocks containing fossils in a stream bank. The fossils look similar to animals currently living in the ocean. Which conclusion should the geologist make based on the discovery of these fossils?

What is 'half-life'?

What is radio active decay?

What does radio active dating works best to determine?

What type of fossil is this?

What type of fossil is this?

What type of fossil is this?

What is hardened tree sap?

Access all questions and much more by creating a free account

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