Quiz about Absolute Dating

Question 1

Determining actual age of an event or object in years is called

Accepted Answer

absolute dating

Answer

radioactive decay

Answer

half-life

Answer

radiometric dating

Question 2

The breakdown of a radioactive isotope into the stable isotope of the same element or of another element is called

Accepted Answer

radioactive decay

Answer

absolute dating

Answer

half-life

Answer

radiometric dating

Question 3

The time needed for half of a sample of a radioactive substance to undergo radioactive decay to form daughter isotopes is called

Accepted Answer

half-life

Answer

absolute dating

Answer

radioactive decay

Answer

radiometric dating

Question 4

Finding the absolute age of a sample by determining the relative percentage of a radioactive parent isotope and a stable daughter isotope is called

Accepted Answer

radiometric dating

Answer

absolute dating

Answer

radioactive decay

Answer

half-life

Question 5

Atoms of the same element that have a different number of neutrons are called

Accepted Answer

isotopes

Answer

absolute dating

Answer

radioactive decay

Answer

half-life

Question 6

How much of a radioactive parent isotope remains after one half-life has passed?

Accepted Answer

half of the original amount because half-life refers to the time it takes for half of a radioactive substance to undergo radioactive decay

Answer

all of the parent isotope because half-life refers to the time it takes for half of a radioactive substance to undergo radioactive decay

Answer

one quarter of the original amount because half-life refers to the time it takes for half of a radioactive substance to undergo radioactive decay

Question 7

If a parent isotope is at 16 and the daughter isotope is at 0, what will happen to the parent isotope after one half-life?

Accepted Answer

the parent isotope becomes 8

Answer

the parent isotope stays 16

Answer

the parent isotope becomes 4

Question 8

What is the best type of rock for radiometric dating?

Accepted Answer

igneous rock

Answer

sedimentary rock

Answer

regular rock

Answer

coarse rock

Question 9

Methods of radiometric dating are

Accepted Answer

radiocarbon dating

Accepted Answer

potassium-argon dating

Accepted Answer

uranium-lead dating

Question 10

The ages of these can be found using radiocarbon dating.

Accepted Answer

wood

Accepted Answer

bones

Accepted Answer

shells

Accepted Answer

other organic remains

Question 11

You find a bone in a rock that you think is about 500,000 years old. Would you use radiocarbon dating to find the age of the bone?

Accepted Answer

No, if the rock is about 500,000 years old then the bone is likely that old also. Radiocarbon dating is for organic material no older than about 45,000 years.

Answer

Yes, radiocarbon dating has no time frame on when it can be used.

Question 12

Argon is the daughter isotope of potassium.

Accepted Answer

True

Answer

False

Question 13

Potassium-argon dating is used to date igneous volcanic rock.

Accepted Answer

True

Answer

False

Question 14

Potassium-argon dating is for rocks that date between about 100,000 years and a few billion years old.

Accepted Answer

True

Answer

False

Question 15

Uranium-lead dating is based on measuring the amount of lead daughter isotope in a sample that had began the radioactive decaying process.

Accepted Answer

True

Answer

False

Question 16

Radiometric dating can be used to date how old Earth is by using rocks from Earth.

Accepted Answer

False

Answer

True

Question 17

Meteorites that have fallen to Earth have been used to help date how old Earth really is because they have fallen from our solar system.

Accepted Answer

True

Answer

False

Question 18

The absolute ages of rock samples that have been found throughout our solar system date back to 6.4 billion years ago. That tells us Earth is roughly 6.4 billion years old.

Accepted Answer

False

Answer

True

Question 19

To be an index fossil

Accepted Answer

the organism from which the fossil formed must have lived during a relatively short geologic time span

Accepted Answer

the fossils of the organism must be relatively common (meaning several of this type of organism) and must be found over a large area

Accepted Answer

must also have features that make them different from other fossils

Question 20

Uranium-lead dating is used on igneous rocks that are between 100 million years and billions of years old.

Accepted Answer

True

Answer

False

Question 21

Index fossils

Accepted Answer

determine the absolute age of rock layers they are found in

Accepted Answer

distinct and existed for a short period of time

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