ESS
Grade-9
Easy
Question
Which of the following statement is correct?
- The planets revolve in orbit due to inertia.
- The movement of planets is in a straight line due to gravity.
- Venus is an outer planet.
- Mars has no moons.
Hint:
Planets revolve in a circular fashion around the sun due to Sun's gravity and inertia.
The correct answer is: The planets revolve in orbit due to inertia.
- The planets' inertia is what keeps the planets moving.
- Inertia combined with the sun's gravity is what causes the planets to travel around the sun. This law of inertia can be applied to all objects in space
- Venus is an inner planet.
- Mars has two moons.
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