Which of the following statements is true? A. Sound waves create areas of high and low pressure.
B. Areas of high pressure are called compressions.
C. Areas of low pressure are called rarefactions.
D. All of the above.

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

What does a numerical subscript following an element in a chemical formula mean?

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as