How does a pulley make work simpler ? Differentiate between a single fixed pulley and a single movable pulley.

There is a car. Its tank is full of fuel, but it does not move. Why is that?

Fill in the blanks:

(i) The average weather taken over a long time is called _____.

(ii) A place receives very little rainfall and the temperature is high throughout the year, the climate of that place will be _____ and _____.

(iii) The two regions of the earth with extreme climatic conditions are ______ and ______.