The Earth

The Earth completes one revolution around the Sun in ..........................days.

• 24

• 365.25

• 150

• 60

The Earth is preceded by .............

• Mercury and Venus

• Venus and Mars

• Jupiter and Mars.

• Mercury and Mars

Earth is locates in the solar system regarding its distance from the Sun in the order.

• third

• fourth

• fifth

• seventh

Regarding the volume, Earth occupies the ..................order (ascendingly) in the solar system.

• third

• fourth

• fifth

• eighth

All of the following are among the characteristics supporting the continuity of life on the Earth except................

• atmosphere.

• temperature.

• gravity.

• electromagnetic force.

The percentage of oxygen gas in the atmospheric air is ..................

• 0.03 %

• 78 %

• 87 %

• 21 %

The most abundant gas in the atmospheric air is.............. gas.

• oxygen

• carbon dioxide

• nitrogen

• hydrogen

Which of the following gases is not considered among the air components ?

• Carbon dioxide.

• Nitrogen.

• Oxygen.

• Sulphur dioxide.

he percentage of water vapour in air is................

• 0.03 %

• not stable

• 0.13%

• 21 %

• sun

• sit

• snail