Earth's atmosphere contains about __________ percentage of nitrogen and oxygen.

(a)

78% and 21%

(b)

22% and 1%

(c)

21% and 0.97%

(d)

10% and 20%

________is generally defined as the average conditions of the weather of a place or a region.

(a)

earth

(b)

atmosphere

(c)

climate

(d)

sun

The earth receives energy from __________.

(a)

current

(b)

electro magnetic radiation

(c)

waves

(d)

heat

Which one the following represents places with equal amount of rainfall

(a)

isotherm

(b)

isohel

(c)

isobar

(d)

isohytes

______ is used to measure the humidity

(a)

anemometer

(b)

barometer

(c)

hygrometer

(d)

thermometer