About the climate - What’s the word?

Can you complete the sentences? You will find the answers in the word square. They go across, down and at an angle. Put a word from the square into each sentence.

1) Warm air rises, but cold air _____________.
 
2) In tropical areas it is never _____________.
 
3) In a rainforest it rains very often. The ground is always _____________.
 
4) In temperate areas the average temperature of the coldest month does not go _____________ –3°C.
 
5) In desert areas it can be very cold at _____________.
 
6) In polar areas, the average temperature of a month _____________ rises above 10°C.

Did you have problems to fill in the right words?
They are the opposites of the following words.

day – above – rise – dry – always - warm