12 ATAR Human Biology - Absolute and Relative dating

Relative Dating dates rocks __________
Absolute Dating dates rocks __________

• exact age; sequence
• sequence; exact age
• exact age; parent isotopes
• Laws; Isotopes

Scientists use radioactive decay to measure...

• relative time
• absolute time
• half-lives
• time of day

Tags

NGSS.HS-PS1-8

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

What percent of carbon-14 would be left after 5730 years?

• 100%
• 75%
• 50%
• 25%

Tags

CCSS.HSF.LE.A.4

What percent of carbon-14 would be left after 11,460 years? (2 half lives)

• 100%
• 75%
• 50%
• 25%

Tags

CCSS.HSF.LE.A.4

If one-fourth of the carbon-14 is remaining then how many half-lives have passed?

• 1
• 2
• 3
• 4

Tags

CCSS.HSF.LE.A.4

what's the half life of this substance?

• 1 day
• 5 days
• 3 days
• 9 days

A bone was that originally had 10 grams of Carbon 14 now has about 1.25 grams.  How many YEARS have passed? (not half lives)

• 3
• 5730
• 6000
• 17,200

Tags

CCSS.HSF.LE.A.4

As time passes, unstable parent materials decays into stable

• carbon
• daughter material
• uranium 238
• Argon

An igneous rock that is newly cooled so has had NO time to age will contain

• only parent isotopes
• only daughter material
• an even mix of parent and daughter
• can't be determined