Lütfen anlayamadım

1- they are work/working in antarctica.
2- on galapagos ıslands/ at nevada desert.
3- it is freezing/hot in antactica.
4- yes/no she doesn't.
5- it's 20°C / -10°C
6- it's cold and windy/ warm and rainy.
7- she feel/feels depressed and moody.
8- ?
9- they are is scientist.(emin degilim.
10- at/on the equator.