Science > > > > miriam notices when she goes to the beach that sometimes the water rises as high as the pier. at other times of the day, the water barely covers the pillars under the pier. these differences in water level are primarily due to the gravitational influence of which of the following? 1) comets 2) asteroids 3) the moon 4) the sun orographic precipitation occurs due to air masses being lifted to higher altitudes by 1) the density difference of air masses 2) the presence of mountain barriers 3) a frontal action 4) extratropical cyclones radiocarbon dating is a useful technique for all samples below except 1) shells 2) bone 3) granite 4) wood

1st one is 3
2nd one is 1
3rd one is 3 I think I'm not too sure 

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.