What is a combination of substances that are combined physically but not chemically

Which of the following best describes the formation of the solar system? O The Sun ejected rocky material, which later went on to form the planets. O Arotating disk of gas and dust was drawn together by the force of gravity.

Read this excerpt from Holes. At the time, Elya thought nothing of the curse. He was just a fifteen-year-old kid, and "eternity" didn't seem much longer than a week from Tuesday.

Which of the following is true about red marrow? a. It makes blood cells. c. It produces new bone. b. It stores fat. d. It is found in compact bones of adults.

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of

The subunits of contain a base, a five-carbon sugar, and a phosphate group. The subunits of are amino acids. Some of the subunits of must come from food. DNA and RNA are.

What is sublimatoin

Which sequence shows the correct path of blood flow between the heart and lungs?

What is the mass of a light bulb and paper clip together

At is the difference between pseudoscience and science

look at the ocean system below plankton, shrimp, salmon, human what will most likely happen if the plankton population decrease in this ocean systems? A. it will be more difficult for salmon to find food. B more shrimp will move into the area C.