Which one of the following conditions is most relevant for the presence of life on Mars?

1. 1. Thermal conditions
   2. Atmospheric composition
   3. Occurrence of ice caps and frozen
   4. Occurrence of ozone

The brightest visible stars is _____.

1. 1. Sirius
   2. Canoes
   3. Altair
   4. Procyon

The only planet whose day is longer than its year is _____.

1. 1. Mars
   2. Uranus
   3. Venus
   4. Neptune

When did the space age begin with the launch of the Russian Sputnik?

1. 1. October 4, 1953
   2. October 4, 1957
   3. October 4, 1960
   4. October 4, 1962

In which year did man first step out on the moon?

1. 1. 1961
   2. 1964
   3. 1967
   4. 1969

The group of small pieces of rock revolving round the sun between the orbits of Mars and Jupiter are called _____.

1. 1. Comets
   2. Asteroids
   3. Meteors
   4. Meteorites

Asteroids or planetoids circle between _____.

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

Phases of the Moon are caused by _____.

1. 1. Rotation of Earth
   2. Rotation of the Moon
   3. The Revolution of the Earth
   4. The Revolution of Earth

Which is the densest planet of the solar system?

1. 1. Jupiter
   2. Sun
   3. Mercury
   4. Earth

Which of the following planets have no moon?

1. 1. Pluto and Mercury
   2. Mercury and Venus
   3. Mars and Venus
   4. Pluto and Mars