Please help if you can I am in a hurry!! Which method of separating a mixture involves passing a heterogeneous mixture through several layers of different materials? filtration decantation evaporation distillation

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins