When does a cold front develop?

when a cold air mass invades a warm air mass

when two masses of warm air meet

when two masses of cold air meet

when a warm air mass invades a cold air mass

What is a significant advantage to the cell in having pyruvate dehydrogenase consist of a large

List these terms from the smallest level to the largest: population, organism, ecosystem, community

Can matter undergo both physical and chemical changes

How do whales, bats, and dolphins use echolocation? To scare away predators To orient themselves and to find food To attract mates To tell other animals of their species where they are

You have a spot of oil, which is nonpolar, on your favorite shirt. in which substance will the oil be most likely dissolve?

How is the Gobi Desert different from the Sahara Desert

Which average wind speed do areas need to effectively power wind farms? A:1 mph B:5 mph C:10 mph D:16 mph

What is the total number of moles represented by 20 grams of CACO3 A. 0.1 B. 0.2 C. 1 D. 2

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.