Olympiad Test Level 2: Earth and Universe - Class 3 MCQ

The Earth's atmosphere absorbs much of the heat from the Sun, preventing the surface from becoming too hot.
This helps regulate the temperature, making us feel less heat.
Thus, the correct answer is "The atmosphere absorbs the heat."

Correct option is B
Statement A is correct: The Sun is the biggest thing in our solar system. It is much bigger than all the planets and moons around it!
Statement B is incorrect: The Moon does not have air (atmosphere) like Earth, so people or animals cannot live on it. Without air, we can't breathe or live there.

Earth moves around the Sun in a path called Revolution, which takes about 365 days.
This movement causes the change in Seasons, like summer, winter, and rainy season.
So, the correct answer is Option D.

In the given diagram, the natural satellite is P. A natural satellite is a moon that orbits around a planet.
If you look closely at the diagram, you will see that P is the moon orbiting around a planet, which makes it the correct answer.

So, the answer is Option B: P.

When the Moon is completely hidden by the Earth's shadow, it is called a Total Lunar Eclipse.
During this type of eclipse, the Earth is between the Sun and the Moon, and the entire Moon gets covered by the Earth's shadow.

So, the answer is Option D: Total Lunar Eclipse.

Venus takes the longest time to rotate once on its axis. It takes about 243 Earth days to complete one rotation.
Interestingly, Venus rotates very slowly, and its rotation is even longer than its orbit around the Sun, which takes about 225 Earth days.

So, the answer is Option A: Venus.

1. The Earth is about 150 million km away from the Sun. This is the correct distance.

2. The Earth completes one rotation on its axis in about 24 hours. The Earth takes 24 hours to rotate once.

3. The Moon completes one rotation on its axis in about 27 days. The Moon takes about 27 days to rotate once on its axis.

4. After the new Moon, the next phase of the Moon is the Crescent phase. After the new Moon, the Moon shows the Crescent phase as it begins to grow.

So, the correct answer is Option B: 150, 24, 27, Crescent.

• A: Earth revolves around the sun in a fixed path called the axis.
  Incorrect. Earth revolves in an orbit, not an axis.

• B: Earth completes one rotation on its axis in about 365 days.
  Incorrect. Earth takes 24 hours for one rotation, not 365 days (which is the time for revolution around the Sun).

• C: Rotation of Earth on its axis causes day and night.
  Correct. Earth's rotation causes day and night.

So, the correct answer is Option D: Both A and B.

During a solar eclipse, the Moon (M) comes between the Sun (S) and the Earth (E). This alignment blocks the sunlight from reaching Earth, causing a solar eclipse.

In the diagram, Option C correctly shows the Moon in between the Sun and the Earth, making it the correct answer.

• W = Sun: The Sun is a star, not a planet.
• X = Venus: Venus is the hottest planet.
• Y = Earth: Earth has a moon.
• Z = Mercury: Mercury is a planet but doesn't have a moon.

So, the answer is Option C.