Chapter Exam

Chapter 12: Earth Moon and the Sun — Online MCQ Test

Q: What is the shape of the orbit in which the Earth moves around the Sun?

Answer: B. Elliptical — The Earth revolves around the Sun in an elliptical orbit, not a perfect circle. This is why the distance between the Earth and the Sun changes slightly during the year.

Q: The natural satellite of the Earth is:

Answer: C. Moon — The Moon is the only natural satellite of the Earth. It revolves around the Earth.

Q: Which of the following correctly matches the motion with its effect?

Answer: C. Moon’s revolution — causes phases of the Moon — The Moon’s revolution around Earth changes the part of the Moon we can see, producing phases. Day and night are due to Earth’s rotation, and seasons are due to Earth’s revolution with tilted axis.

SCIENCE (CURIOSITY) · CLASS 7th · Karnataka State Board

Practice Chapter 12: Earth Moon and the Sun with a free chapter-wise online MCQ test for Karnataka State Board CLASS 7th SCIENCE (CURIOSITY). This chapter covers: Earth Moon Sun Rotation Revolution Orbit Eclipse Seasons Moon phases Solar system Gravity. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 12: Earth Moon and the Sun — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 7th SCIENCE (CURIOSITY) — Chapter 12: Earth Moon and the Sun, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the shape of the orbit in which the Earth moves around the Sun?

A. Circular
B. Elliptical ✓
C. Square
D. Rectangular

Answer: B. Elliptical
The Earth revolves around the Sun in an elliptical orbit, not a perfect circle. This is why the distance between the Earth and the Sun changes slightly during the year.

The natural satellite of the Earth is:

A. Mars
B. Sun
C. Moon ✓
D. Venus

Answer: C. Moon
The Moon is the only natural satellite of the Earth. It revolves around the Earth.

Why do we see different phases of the Moon?

A. Because the Moon changes its shape every day
B. Because the Moon reflects sunlight and its visible part changes as it revolves around Earth ✓
C. Because Earth blocks the Moon's light every night
D. Because the Moon produces its own light sometimes

Answer: B. Because the Moon reflects sunlight and its visible part changes as it revolves around Earth
The Moon does not produce its own light; it reflects sunlight. As it revolves around Earth, we see different portions of the sunlit half.

Why do we always see the same face of the Moon from Earth?

A. The Moon does not rotate
B. The Moon rotates and revolves in the same time period ✓
C. The Earth blocks the other side of the Moon permanently
D. The Moon only has one side

Answer: B. The Moon rotates and revolves in the same time period
The Moon takes nearly the same time to rotate once on its axis as it takes to revolve once around Earth. Because of this, the same side is always turned toward us.

Which of the following correctly matches the motion with its effect?

A. Earth’s rotation — causes seasons
B. Earth’s revolution — causes day and night
C. Moon’s revolution — causes phases of the Moon ✓
D. Moon’s rotation — causes solar eclipse

Answer: C. Moon’s revolution — causes phases of the Moon
The Moon’s revolution around Earth changes the part of the Moon we can see, producing phases. Day and night are due to Earth’s rotation, and seasons are due to Earth’s revolution with tilted axis.