An archeologist runs a carbon dating test on bones found in Olduvai Gorge in Tanzania. She discovers that the carbon-14 isotopes in the bones have undergone three half-lives. Carbon-14 has a half-life of 5,730 years. Approximately how old are the bones? 1,910 years old

3,000 years old

5,730 years old

17,190 years old

Compare and contrast solutions and suspensions

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins. co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)