Differences in temperature between two air masses causes

rain
high pressure systems
the jet stream
cold fronts

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]