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Geology Test: 18 - Geologic Time

Authored by Rosaleen Conrad

Social Studies

10th Grade

Used 13+ times

Geology Test: 18 - Geologic Time
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40 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What scientific development made accurate numerical dating possible?

development of radar

discovery of radioactive dating

discovery of x-rays

correlation of rock layers

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Atoms of the same element with different number of neutrons are called _______________.

ions

isotopes

molecules

polarized

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is radiometric dating?

a technique where the decay of radioactive isotopes is measured and used to determine the age of a geologic material.

a process where the nucleus of an atom is split apart to release energy

a logical approach to putting events into their correct order

all of these

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a half-life?

half the time it takes for the parent isotope to decay to the daugher isotope

the parent isotope half, of a radiometric dating pair

half of the alpha particles necessary to decay at a steady rate

the amount of time it takes for half of the unstable parent isotope to decay into the stable daughter product

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A isotope with a half-life of 1.5 million years is used to measure the age of a rock. How old is the sample if the parent/daughter ratio is 12.5% to 87.5%?

4.5 billion years

1.5 million years

4.5 million years

375,000 years

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What kinds of materials are best dated using carbon-14?

sandstones

volcanic rocks

igneous rocks

organic matter

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What term is used for the radioactive, unstable isotope?

parent

daughter

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