Grade 7 : Science (Curiosity) - 12. Earth, Moon, Sun (Set 4)

Question 1

Observe the following diagram representing the alignment of celestial bodies.

Sun --- Earth --- Moon

What astronomical event is best represented by this alignment?

Accepted Answer

A) Lunar Eclipse

Answer

B) Solar Eclipse

Answer

C) New Moon

Answer

D) Full Moon

Question 2

Consider the image showing the Moon's appearance from Earth over a month. One of the phases is labeled 'X'.

[Imagine an image showing the Moon as a crescent, where only a small sliver is visible on the right side, just after New Moon.]

If 'X' represents the phase immediately following the New Moon, which phase is it?

Accepted Answer

B) Waxing Crescent

Answer

A) Full Moon

Answer

C) Waning Gibbous

Answer

D) First Quarter

Question 3

Celestial Body	Diameter (km)	Average Distance from Earth (km)	Orbital Period
Moon	3,474	384,400	~27.3 days (sidereal)
Sun	1,392,000	150,000,000	N/A (Earth orbits Sun)
Earth	12,742	N/A (reference)	~365.25 days

Based on the provided table, which statement accurately compares the Sun and the Moon?

Accepted Answer

C) The Sun's diameter is much greater than the Moon's diameter.

Answer

A) The Moon is significantly larger than the Sun.

Answer

B) The Sun is closer to Earth than the Moon.

Answer

D) The Moon's orbital period is longer than Earth's orbital period around the Sun.

Question 4

An observer in the Northern Hemisphere is shown on Earth in a position where the Northern Hemisphere is tilted away from the Sun.

What season would this observer most likely be experiencing?

Accepted Answer

D) Winter

Answer

A) Spring

Answer

B) Summer

Answer

C) Autumn

Question 5

Imagine a simplified diagram showing the Earth orbiting the Sun. Point A represents the Earth's position in December, and Point B represents its position in June.

[Assume a standard elliptical orbit where December is near perihelion and June near aphelion for conceptual understanding, but focus on tilt for seasons.]

At which point (A or B) would the Northern Hemisphere experience its longest day?

Accepted Answer

B) Point B (June)

Answer

A) Point A (December)

Answer

C) Both A and B equally

Answer

D) Neither A nor B

Question 6

A diagram illustrates the Moon's orbit around Earth. Two positions are marked:

Position 1: Moon is directly between the Sun and Earth.

Position 2: Earth is directly between the Sun and Moon.

Which Moon phase would an observer on Earth see when the Moon is in Position 1?

Accepted Answer

A) New Moon

Answer

B) Full Moon

Answer

C) First Quarter

Answer

D) Last Quarter

Question 7

A student observes the Sun rising directly in the east and setting directly in the west. This observation occurs twice a year.

These specific days are known as:

Accepted Answer

C) Equinoxes

Answer

A) Solstices

Answer

B) Aphelions

Answer

D) Perigee

Question 8

A diagram depicts the relative sizes of Earth, Moon, and Sun. The Sun is represented by a large circle, Earth by a medium circle, and the Moon by a small circle.

[Assume a diagram accurately showing Sun >> Earth > Moon in diameter.]

Which of the following statements about their relative sizes is accurate based on typical astronomical representations?

Accepted Answer

A) The Sun's diameter is approximately 109 times that of Earth.

Answer

B) The Moon's diameter is larger than Earth's.

Answer

C) The Sun and Earth have roughly the same diameter.

Answer

D) The Moon is about half the size of the Sun.

Question 9

Imagine a simplified representation of tidal forces:

Sun ----- Earth (with water bulges) ----- Moon

The water bulges are shown on the sides of Earth facing towards and away from the Moon.

This diagram primarily illustrates the cause of:

Accepted Answer

D) Spring tides

Answer

A) Neap tides

Answer

B) Eclipses

Answer

C) Seasons

Question 10

Celestial Body	Diameter (km)	Average Distance from Earth (km)	Orbital Period
Moon	3,474	384,400	~27.3 days (sidereal)
Sun	1,392,000	150,000,000	N/A (Earth orbits Sun)
Earth	12,742	N/A (reference)	~365.25 days

An ancient astronomer recorded observing a phenomenon where the Moon gradually disappeared from view for a few hours, then slowly reappeared. Based on the table, which event best matches this description?

Accepted Answer

B) Lunar Eclipse

Answer

A) Solar Eclipse

Answer

C) New Moon

Answer

D) Full Moon