Earth's orbit lies between

1. Venus and Mars
2. Mercury and Venus
3. Mars and Jupiter
4. Jupiter and Saturn

The amount of oxygen in earth's atmosphere is

1. 60%
2. 21%
3. 78%
4. 10%

The average distance of earth from the sun is

1. 150 million km
2. 108 million km
3. 1433 million km
4. 228 million km

Earth completes its one revolution around the sun in

1. 360 days
2. 365 1⁄4 days
3. 366 days
4. 300 days