In which two layers of the atmosphere does temperature increase with
altitude?
A. mesosphere and stratosphere
B. mesosphere and troposphere
C. stratosphere and thermosphere
D. thermosphere and troposphere

What is the name for a substance formed in a chemical reaction

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Asap many people try to eliminate fat from their diets which is one reason it is necessary for humans to eat fat a) fat is the only way to get energy b) every cell in the body must contain fat c)fat stores less energy than polysaccharides d) saturated fats make blood vessels healthier