3 4 5 Half-lives

4. If the half-life of carbon-14 is 5,730 years, how many years would it take for | of the original amount of carbon-14 in a sample to decay?

F. 5,014 years

G. 11,460 years

H. 17,190 years J. 22,920 years

DIRECTIONS: Complete the following analogy.

5. chloroplasts : cyanobacteria :: mitochondria :

A. archaea

B. aerobic prokaryotes

C. anaerobic eukaryotes

D. chemosynthetic bacteria

INTERPRETING GRAPHICS: Use the table below to answer the questions that follow.

Estimated Abundance of Some Elements on Earth and in Meteorites


Earth (% of total mass)

Meteorites (% of total mass)


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