Absolute Age Pre-test

The length of time required for half of the radioactive atoms in a sample to decay is its...

• era

• age

• half life

• eon

Tags

NGSS.HS-PS1-8

Radiometric dating is possible because the rates of decay of radioactive isotopes _____.

• change over time

• change from place to place

• are constant

• vary widely

Tags

NGSS.HS-PS1-8

The element that is the product of radioactive decay is known as the...

• daughter element

• half life

• parent element

• carbon-14

Tags

NGSS.HS-PS1-8

Scientists use radioactive decay to measure...

• relative time

• absolute time

• half lives

• length of year

Tags

NGSS.HS-PS1-8

 The original element that undergoes radioactive decay is known as the...

• daughter element

• half life

• parent element

• carbon-14

Tags

NGSS.HS-PS1-8

Carbon-14 is found in once-living organisms and has a half-life of about 5,700 years. Uranium-238 is found in some kinds of rocks and has a half-life of about 4.5 billion years. What would be the best way to find the age of animal bones from a cave?

• carbon dating

• uranium dating

• neither would work

• both would work

Carbon-14 is found in once-living organisms and has a half-life of about 5,700 years. Uranium-238 is found in some kinds of rocks and has a half-life of about 4.5 billion years. What would be the best way to find the age of a very old rock formation?

• carbon dating

• uranium dating

• neither would work

• both would work

Tags

NGSS.HS-PS1-8

How many grams of Carbon-14 will remain after 17,100 years- C-14 has a half life 5,730 so 17,100 is about 3 half lives?

• 32 g

• 16 g

• 8 g

• 4 g

Iodine-131 has a half-life of 8 days. After 32 days, how much of your original iodine will be left?

• 75%

• 50%

• 25%

• 12.5%

• 6.25%

Tags

NGSS.HS-PS1-8