The temperature in the upper atmosphere is -2°c, and the temperature on earth’s surface is 5°c. which type of weather is most likely in these conditions?

Windy

Explanation:

The cold air drops down while the hot air rises, causing wind to rush about.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.