Naturally, occurring copper has two isotopes with relative atomic masses 62.930 and 64.928. If the average relative atomic mass is 63.546, what are the relative % abundances of the two

isotopes in this sample?

Rays from the sun are not considered matter true or false

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction