A tide is

A. A change in the height of waves.

B. The periodic rise and fall of any body of water

C. The periodic rise and fall of the ocean surface

D. A measurement of the strength of gravity

Which characteristic do Mercury and Mars share? many moons rocky surfaces thick atmospheres moderate temperature fluctuations

Sylvatic plague is a disease spread by fleas. This disease can reduce a population of prairie dogs by 90 percent. If prairie dogs are dusted regularly with pesticides, what is most likely to happen to the prairie dog population? O A.

When are two animals classified as belonging to the same species? A) When they have the same feeding habits. B) When they are found in the same habitat. C) When they have many common physical features.

Because of genetic variation, a species of beetle has two different body colors, red and green. This species exists in a grassy environment that's mostly green. A new species of bird that eats these beetles enters the area.

What organs does the pelvic region hold

How the carbon cycle might be affected if we increased the extraction rate of fossil fuels.

Ovules and pollen grains take part in what process?

Human activities, such as the burning of fossil fuels, result in air pollution. what could be an outcome if the amount of smoke released is not regulated?

In cases of liver or kidney failure, doses of medication may need to be:

A scientist is testing the effectiveness of Drug X on cancer. She gives a small amount of the drug to the mice that have cancer.