What method can scientists use to determine the absolute age of a rock?

Which factor is a major cause of the changes that occur during puberty?

You discover a new species of bacteria that grows in aquatic environments with high salt levels. While studying these bacteria, you note that their internal environment is similar to the salt concentrations in their surroundings.

Which of the following is a chemical barrier that is able to destroy the cell walls of certain harmful bacteria? a. mucus membranes b. skin c. white blood cells d. enzymes in tears

What happens to radiation as it passes through earth's atmosphere

Which animals has a heart in which oxygenated and deoxygenated blood mix?

Which layer of the atmosphere does all weather take place?

A salt is added to a solution of water. Which physical property of the water is most likely to change?

When the moon is between the Earth and Sun it cannot be seen and is called a ___ moon.

Proteins attract water and hold it within blood vessels, preventing it from freely flowing into the spaces between the cells. this is an example of how protein is used for: a. maintaining fluid and electrolyte balance. b. building antibodies. c.

Identify the fuel that could be classified as a nonrenewable or renewable resource. A) biomass B) geothermal C) wind D) tidal