Earth, Moon, and the Sun – MCQs with Answers and Explanations

Quick navigation (topic-wise):

Rotation & Day–Night (Q1–Q8)
Revolution & Seasons (Q9–Q17)
Tilt of Axis & Effects (Q18–Q22)
Phases of the Moon (Q23–Q30)
Eclipses (Q31–Q36)
Satellites, Calendar & Time (Q37–Q40)

Rotation & Day–Night

1. Why do we experience day and night on Earth?

A. Because the Sun moves around the Earth once every day.
B. Because the Earth rotates on its axis once every 24 hours.
C. Because the Moon blocks the Sun every day for half the Earth.
D. Because the Earth revolves around the Sun every day.

Rotation & Day–Night

2. Which direction does the Earth rotate as seen from above the North Pole?

A. Clockwise
B. Counterclockwise
C. North to South
D. The Earth does not rotate

Rotation — Speed

3. Which location on Earth has the greatest linear speed due to rotation?

A. At the North Pole
B. At the Equator
C. At 45° latitude
D. All places have the same linear speed

Rotation — Sundials

4. A sundial shows the shortest shadow at a place when:

A. Sunrise
B. Sunset
C. Local noon
D. Midnight

Rotation — Apparent Motion

5. Why does the Sun appear to move across the sky from east to west?

A. The Sun actually moves around Earth each day.
B. Earth rotates from east to west.
C. Earth rotates from west to east, making the Sun seem to move east to west.
D. The Moon pulls the Sun across the sky.

Rotation — Local Time

6. Two cities at different longitudes will have different times of local noon because:

A. They are at different latitudes
B. Earth rotates and longitude determines local solar time
C. The Moon affects local noon
D. The Sun’s distance changes

Rotation — Effects

7. If Earth suddenly stopped rotating (ignoring atmosphere), which immediate effect would be expected?

A. Day and night cycle would remain the same.
B. One side of Earth would stay in daylight while the other in darkness.
C. Seasons would become more intense.
D. The Moon would disappear.

Rotation — Observations

8. The time difference between two places 15° longitude apart is approximately:

A. 1 hour
B. 15 minutes
C. 24 hours
D. 1 day

Revolution — Year

9. Earth completes one revolution around the Sun in about:

A. 24 hours
B. 365 days
C. 27 days
D. 29.5 days

Seasons — Cause

10. The main reason for seasons on Earth is:

A. Change in Earth–Sun distance
B. Tilt of Earth's axis and revolution around the Sun
C. The Sun's changing brightness
D. The Moon's position

Seasons — Opposite Hemispheres

11. When it is summer in India (Northern Hemisphere), what is the season in Australia (Southern Hemisphere)?

A. Summer
B. Winter
C. Spring
D. Autumn

Seasons — Sun's Angle

12. During summer in a hemisphere, the Sun’s rays fall:

A. At a very slanting angle
B. More directly (steeper angle)
C. Not at all
D. Only at night

Seasons — Inland vs Coastal

13. Coastal regions usually have milder seasons than inland because:

A. Oceans have higher heat capacity and moderate temperature
B. Coastal areas get less sunlight
C. Coastal areas are always colder
D. Inland areas have more clouds

Seasons — Southern Hemisphere

14. In which month does the Northern Hemisphere generally experience winter?

A. June
B. December
C. March
D. September

Seasons — Equator

15. Near the equator, seasons are less pronounced because:

A. The equator receives nearly similar sunlight all year
B. The equator faces away from the Sun
C. The equator moves faster
D. The equator has longer nights

Orbit — Shape

16. Earth’s orbit around the Sun is:

A. Perfect circle
B. Elliptical (slightly elliptical)
C. Square
D. Spiral

Seasons — Leap Year link

17. Why do we have a leap year every four years?

A. Because Earth revolves twice every two years
B. Because the Earth’s revolution takes about 365.25 days
C. Because months would otherwise be shorter
D. Because the Moon causes extra days

Tilt of Axis

18. Earth's axis is tilted at approximately:

A. 0°
B. 23.5°
C. 45°
D. 90°

Tilt — Hypothetical

19. If Earth had no axial tilt (0°), then:

A. Seasons would remain unchanged
B. There would be no seasons as we know them
C. Days would become shorter
D. The Moon would start revolving faster

Tilt — Polar Day/Night

20. Polar regions experience continuous daylight or darkness for months because of:

A. Earth’s tilt and revolution
B. The Moon’s presence
C. Ocean currents
D. The Sun moving slowly

Tilt — Sun Path

21. During summer the Sun's path in the sky (for a given location) is:

A. Lower across the sky
B. Higher across the sky
C. Same as in winter
D. Invisible

Tilt — Insolation

22. Which statement is correct?

A. Tilt causes equal insolation everywhere
B. Tilt affects the angle and duration of sunlight, changing insolation by latitude
C. Tilt affects only the poles
D. Tilt is unrelated to sunlight

Phases of the Moon

23. The phases of the Moon are caused by:

A. Earth's shadow falling on the Moon every night
B. The Moon changing its own shape
C. Changing positions of the Moon, Earth and Sun so we see varying illuminated parts
D. The Sun moving around the Moon

Phases — New Moon

24. During a new moon the Moon is located approximately:

A. Opposite side of Earth from Sun
B. Between Earth and Sun
C. At right angle to Earth and Sun
D. At the north pole

Phases — Full Moon

25. A full moon occurs when:

A. The Moon is between Earth and Sun
B. Earth is between Sun and Moon
C. Moon is at its closest point to Earth
D. Moon is on the equator

Phases — Moonrise Times

26. The Moon rises roughly how much later each day?

A. 10 minutes
B. 50 minutes
C. 12 hours
D. 24 hours

Phases — Quarter Moon

27. A half-lit Moon seen around sunset is most likely the:

A. New Moon
B. Full Moon
C. First Quarter
D. Waning Gibbous

Phases — Synodic Month

28. The time between two full moons (synodic month) is about:

A. 7 days
B. 14 days
C. 29.5 days
D. 365 days

Phases — Visibility

29. Which phase of the Moon is best for observing the lunar surface features (craters and mountains) through shadows?

A. New Moon
B. Full Moon
C. Around first and last quarters
D. Annular Moon

Phases — Cause Clarify

30. During which moon phase is a solar eclipse possible?

A. New Moon
B. Full Moon
C. First Quarter
D. Any phase

Eclipses — Basic

31. A lunar eclipse occurs when:

A. Moon comes between Sun and Earth
B. Earth comes between Sun and Moon
C. Sun comes between Earth and Moon
D. Moon disappears

Solar Eclipse — Visibility

32. A total solar eclipse is visible from:

A. The entire Earth
B. Only those regions within the Moon’s shadow on Earth
C. Only at the poles
D. Only in the daytime in the Southern Hemisphere

Eclipse Types

33. An annular solar eclipse appears as:

A. Complete darkness like night
B. Moon covering Sun completely
C. A bright ring of the Sun around the Moon
D. A red moon

Eclipse — Rarity

34. Why do solar eclipses not happen every new moon?

A. Because the Moon is too small
B. Because the Moon’s orbital plane is tilted about 5° to Earth's orbital plane
C. Because the Sun moves away
D. Because the Earth speeds up

Eclipse — Colour of Lunar Eclipse

35. During many lunar eclipses the Moon appears reddish because:

A. Moon produces its own red light
B. Earth’s atmosphere bends and scatters sunlight, allowing red light to reach Moon
C. Moon is on fire
D. Old cameras capture red better

Eclipses — Safety

36. Which of the following is the safest way to view a solar eclipse?

A. With bare eyes
B. Using a pinhole projector or eclipse glasses
C. Using sunglasses
D. Looking through a telescope without filters

Satellites — Natural vs Artificial

37. Which of the following is a natural satellite of Earth?

A. Chandrayaan
B. ISS
C. Moon
D. Hubble Space Telescope

Calendar — Leap Year Rule (simple)

38. Why do we add 29th February in a leap year?

A. To make February longer for holidays
B. Because Earth needs 365¼ days to revolve around Sun
C. Because months are irregular
D. Because the Moon's orbit changes

Time Zones

39. The local time at a place 30° east of your location will be approximately:

A. 2 hours behind
B. 2 hours ahead
C. 30 minutes ahead
D. 24 hours behind

Satellites — Phases vs Flash

40. Why do we not observe phases for most artificial satellites the way we do for the Moon?

A. Artificial satellites do not reflect sunlight
B. They are too small, near and move quickly producing brief glints rather than slow phases
C. The Moon's surface is transparent
D. Artificial satellites are always in Earth's shadow

Note: These MCQs are strictly aligned with NCERT Class 7 Chapter 12 topics: Earth’s rotation & revolution, tilt, seasons, phases of Moon, eclipses, satellites, and calendar/time concepts. Use them for class tests and CBSE-style exam revision.