changing from ice to water

(a)  

mathematically normal

(a)  

a little

(a)  

to go up

(a)  

repeated ways in which something happens

(a)  

a high temperature

(a)  

to live and develop, become larger

(a)  

in place of

(a)  

the be present

(a)  

The whole world is getting warmer, but temperatures in some places are (a)   faster than in other places.

In the past, the weather (a)   there was always about the same—cool in the summer and very cold in the winter.

People in Greenland are growing more food (a)   buying all their food from other countries.

Although ice still covers most of Greenland, some of the ice is (a)   .

That means there is now a little more land, and the land holds the (a)   from the sun, so even more ice is disappearing.