The following 20 Multiple Choice Questions (MCQ) are based on
Chapter 12: Earth, Moon, and the Sun from the NCERT Class 7
Science textbook Curiosity. Each question has four options - select the
best answer and click to check.
Instructions: Read each question carefully. Choose the most
appropriate option from (a), (b), (c), or (d). Click
Show Answer to reveal the correct answer with explanation.
Multiple Choice Questions
1Earth's rotation is its motion:
(a) About its own axis
(b) Around the Moon
(c) Around the Sun only
(d) Through the galaxy only
(a) is correct
Earth spins around an imaginary axis passing through its poles.
2Earth rotates from:
(a) East to west
(b) North to south
(c) South to north
(d) West to east
(d) is correct
This direction makes the Sun appear to move east to west.
3The apparent daily motion of the Sun is mainly caused by:
(a) Moon's rotation
(b) Cloud movement
(c) Earth's rotation
(d) Earth's revolution
(c) is correct
We rotate eastward, so the sky appears to move westward.
4One rotation of Earth takes approximately:
(a) 12 months exactly
(b) 24 hours
(c) 365 days
(d) 29.5 days
(b) is correct
The daily rotation cycle produces day and night.
5Day occurs on the part of Earth that:
(a) Faces the Sun
(b) Faces away from the Sun
(c) Is always northern
(d) Is covered by clouds
(a) is correct
Sunlight illuminates the hemisphere turned toward the Sun.
6Earth's revolution is its motion:
(a) Around its axis
(b) Around the Moon
(c) Inside the atmosphere
(d) Around the Sun
(d) is correct
Earth follows an orbit around the Sun.
7One revolution of Earth takes about:
(a) 30 days
(b) 12 hours
(c) 365.25 days
(d) 24 hours
(c) is correct
The orbital period defines a year.
8Why is a leap day added in some years?
(a) To lengthen every month
(b) To account for the extra quarter day each year
(c) To change Earth's orbit
(d) To create a season
(b) is correct
Four approximate quarter-days accumulate to about one full day.
9The changing view of constellations over a year is mainly due to:
(a) Earth's revolution around the Sun
(b) Daily cloud cover
(c) Moonlight only
(d) Earth stopping its rotation
(a) is correct
At different orbital positions, Earth's night side faces different directions in space.
10Seasons occur mainly because of Earth's:
(a) Changing distance alone
(b) Daily rotation only
(c) Moon phases
(d) Tilted axis and revolution around the Sun
(d) is correct
Axial tilt changes solar angle and day length in each hemisphere during the orbit.
11When the Northern Hemisphere is tilted toward the Sun, it generally experiences:
(a) No season
(b) A lunar eclipse
(c) Summer
(d) Winter
(c) is correct
It receives more direct sunlight and longer days.
12At the same time, the Southern Hemisphere generally experiences:
(a) No daylight
(b) Winter
(c) Summer
(d) The same season everywhere
(b) is correct
The hemispheres are tilted oppositely relative to incoming sunlight.
13An equinox is a time when:
(a) Day and night are nearly equal in length
(b) The Sun disappears
(c) Earth stops rotating
(d) Only one hemisphere has daylight
(a) is correct
Neither hemisphere is strongly tilted toward the Sun.
14A solar eclipse occurs when:
(a) Earth comes between Sun and Moon
(b) The Sun comes between Earth and Moon
(c) Clouds cover the Moon
(d) The Moon comes between Sun and Earth
(d) is correct
The Moon's shadow falls on a limited region of Earth.
15During a solar eclipse, the object casting the shadow on Earth is the:
(a) Earth
(b) A planet other than Earth
(c) Moon
(d) Sun
(c) is correct
The Moon blocks some sunlight and projects its shadow.
16A lunar eclipse occurs when:
(a) The Moon enters a cloud
(b) Earth comes between Sun and Moon
(c) Moon comes between Sun and Earth
(d) Sun comes between Earth and Moon
(b) is correct
Earth's shadow falls on the Moon.
17Why does an eclipse not occur at every new or full Moon?
(a) The Moon's orbit is tilted relative to Earth's orbital plane
(b) The Moon has no orbit
(c) Earth has no shadow
(d) The Sun is too small
(a) is correct
Most months the three bodies are not aligned closely enough.
18The safest way to observe a solar eclipse is:
(a) With bare eyes
(b) Through ordinary sunglasses
(c) Through exposed photographic film
(d) With certified eclipse viewers or indirect projection
(d) is correct
Only approved filters or projection protect eyes from intense solar radiation.
19Looking directly at the Sun can damage the:
(a) Tongue
(b) Fingernail
(c) Retina
(d) Eardrum
(c) is correct
Focused solar radiation can injure light-sensitive tissue at the back of the eye.
20A lunar eclipse is safe to watch with unaided eyes because:
(a) The Moon is always behind clouds
(b) The Moon only reflects relatively weak sunlight
(c) It produces no visible light
(d) Earth's shadow emits harmful rays
(b) is correct
Unlike direct solar viewing, observing the dimmed Moon does not expose eyes to intense sunlight.
