The ratio of uranium-238 to lead-206 in a rock sample can be used to determine the samples
a. absolute age
b. relative age
c. radioactivity
d. mass

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

Which organism actively hunts other