What could the hardness of a mineral be if it can be scratched by a cent coin?

Which stage of the hydrologic cycle can be the most direct cause of algal blooms?

Questions A Navy vessel is traveling due north during wartime. A torpedo has been launched by an enemy directly toward the stern (rear) of the vessel. Can the vessel outrun the torpedo if both continue in a straight line due north?

In the name tyrannosaurus rex, what is the species name?

What are the three parts of the brain?

Places on Earth that receive a relatively small amount of sunlight have a different type of climate than places that get more sunlight. Besides the amount of sunlight an area receives, other related factors affect an area's climate too.

Which ecosystems have high biodiversity? low biodiversity?

Until the 1600s, people who investigated problems related to our understanding of the natural world were called

What is tolerance? How is it critical to the normal functioning of the immune system

In which part of the body would melanoma develope

What advantage do organisms in a food web have over those in a food chain?