4)which of the following best refers to an air mass that forms over tropical land ?
a) tc
b)ac
c) te
d) pm

5) which of the following best defines a warm front ?

a) place where warm air sinks under cold air
b) place where warm air meets cold air and both stay still
c) place where warm air pushes down cold air
d) place where warm air rises over cold air.

8) a low pressure system usually brings clouds and rain
a) true
b) false