Test: Earth and Universe - 1 - Class 4 MCQ

The sun is the primary source of energy for all life on Earth. It is a massive ball of hot and burning gases composed mainly of hydrogen and helium.

Venus is often referred to as the Veiled planet. It has an atmosphere predominantly composed of carbon dioxide, with minimal water vapor content.

Mars is known as the Red planet and experiences the largest dust storms in the solar system. It also has a diameter approximately half that of Earth.

Jupiter has the fastest rotation period among all the planets, completing one rotation in approximately 10 hours.

Saturn has the most complex and extensive ring system in our solar system. The rings are made up of countless particles, ranging in size from micrometers to meters, that orbit Saturn.

Neptune is considered the coldest planet in the solar system. It has the slowest revolution speed and takes an average of 164.79 Earth years to complete one orbit.

Jupiter is the largest planet in our solar system. Its immense size allows it to encompass all the other planets within its volume.

The sun is primarily composed of hydrogen and helium gases.

Mercury lacks natural satellites and experiences significant temperature variations between day and night due to its proximity to the sun.  Mercury does not have any satellite of its own.

Earth's natural satellite is called the Moon. It revolves around Earth, causing the creation of seasons and the cycle of day and night.