Erth101 Practice Exam 3 With
Correct Answers
Why are meteorites ideal for age studies of the Earth? - ANSWER There is
very little chance of their composition being altered after their formation
Earth formed approximately how many years ago? - ANSWER 4.6 billion
What techniques are used to determine when the Earth was formed? -
ANSWER all of these
Which best describes beta decay? - ANSWER The nucleus emits a negative
particle that changes one of the neutrons into a proton.
What does radiometric dating use to estimate the age of geologic samples? -
ANSWER naturally occurring radioactive decay
When an organism dies, what happens to the amount of radiocarbon in its
tissue? - ANSWER It decreases consistently according to the half-life clock.
Why have lunar rocks not been subjected to much recycling? - ANSWER All of
Correct Answers
Why are meteorites ideal for age studies of the Earth? - ANSWER There is
very little chance of their composition being altered after their formation
Earth formed approximately how many years ago? - ANSWER 4.6 billion
What techniques are used to determine when the Earth was formed? -
ANSWER all of these
Which best describes beta decay? - ANSWER The nucleus emits a negative
particle that changes one of the neutrons into a proton.
What does radiometric dating use to estimate the age of geologic samples? -
ANSWER naturally occurring radioactive decay
When an organism dies, what happens to the amount of radiocarbon in its
tissue? - ANSWER It decreases consistently according to the half-life clock.
Why have lunar rocks not been subjected to much recycling? - ANSWER All of
