Question : The moon completes ______ rotation on its axis as it completes one revolution around the Earth.

Option 1: 3

Option 2: 2

Option 3: 1

Option 4: 4

Question : Which of the following helps keep the Earth's atmosphere in place?

Option 1: The gravitational force of the moon

Option 2: Rotation of the Earth on its axis

Option 3: The gravitational force of the Earth

Option 4: The gravitational force of the Sun

Question : The solar eclipse occurs when:

Option 1: the Sun comes between the moon and the Earth

Option 2: the moon moves too far away from the Sun

Option 3: an asteroid comes between the Sun and the moon

Option 4: the moon comes between the Earth and the Sun

Question : If an object executes 10 oscillations per second, then its frequency in kilohertz is equal to:

Option 1: 1

Option 2: 10

Option 3: 0.1

Option 4: 0.01

Question : The weight of a body at the centre of the earth is:

Option 1: Half the weight at the surface

Option 2: Zero

Option 3: Twice the weight at the surface

Option 4: Infinite