What are the technical terms for organism that make their own food, and organisms that obtain food through eating other living things ?

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

What do all of the above organisms have in common

Ruby is conducting an investigation. an advantage of her design is that she can use a large range of variables, with that she can not be sure that one variable is the cause of another. what kind of investigation is ruby most likely conducting?