Grade 7 : Science (Curiosity) - 12. Earth, Moon, Sun (Set 3)

Question 1

If the Earth's rotation were to suddenly stop, which of the following immediate and drastic effects would likely occur due to inertia?

Accepted Answer

C) Massive winds would sweep across the surface due to the atmosphere's inertia.

Answer

A) The Moon would fall into Earth.

Answer

B) All water bodies would immediately freeze solid.

Answer

D) All seasons would instantly cease to exist.

Question 2

You observe a Full Moon tonight. Approximately how many days will pass before you can expect to see the Last Quarter Moon?

Accepted Answer

C) 7-8 days

Answer

A) 3-4 days

Answer

B) 14-15 days

Answer

D) 29-30 days

Question 3

A total solar eclipse occurs when the Moon completely blocks the Sun. Which factor is LEAST significant in explaining why total solar eclipses are relatively rare to observe from any single location on Earth, compared to total lunar eclipses?

Accepted Answer

D) The Earth's atmosphere diffuses sunlight.

Answer

A) The Moon's orbit is tilted relative to Earth's orbit around the Sun.

Answer

B) The Moon's apparent size in the sky varies slightly due to its elliptical orbit.

Answer

C) The Sun is much larger than the Moon.

Question 4

We typically experience two high tides and two low tides each day. This phenomenon is best explained by the combined effect of:

Accepted Answer

D) The Moon's gravity pulling water on the near side and inertia/centrifugal effect creating a bulge on the far side.

Answer

A) The Earth's magnetic field interacting with lunar gravity.

Answer

B) The Sun's gravity being exactly twice as strong as the Moon's.

Answer

C) The Moon pulling water only on the side facing it.

Question 5

If Earth's axis had no tilt relative to its orbital plane around the Sun, what would be the most significant impact on Earth's climate?

Accepted Answer

A) There would be no distinct seasons.

Answer

B) Seasons would be much more extreme.

Answer

C) The length of a day would drastically change.

Answer

D) Lunar eclipses would occur daily.

Question 6

During which type of eclipse is the Earth positioned directly between the Sun and the Moon, casting its shadow upon the Moon?

Accepted Answer

B) Lunar eclipse

Answer

A) Solar eclipse

Answer

C) Annular eclipse

Answer

D) Partial solar eclipse

Question 7

The Moon always presents the same face to Earth. This observation provides evidence that the Moon:

Accepted Answer

C) Rotates on its axis at approximately the same rate it revolves around Earth.

Answer

A) Does not rotate on its axis.

Answer

B) Rotates faster than it revolves around Earth.

Answer

D) Has no gravitational interaction with Earth.

Question 8

Without using a telescope, how can an observer typically distinguish a planet from a star when observing the night sky over several consecutive nights?

Accepted Answer

C) Planets appear to shift their position relative to the background stars.

Answer

A) Planets twinkle more noticeably than stars.

Answer

B) Planets are always significantly brighter than any star.

Answer

D) Stars appear as discs, while planets appear as points of light.

Question 9

Which celestial body is approximately one-quarter the diameter of Earth, making it the largest natural satellite in our solar system relative to its parent planet?

Accepted Answer

D) The Moon

Answer

A) Mars

Answer

B) Jupiter

Answer

C) The Sun

Question 10

Light from the Sun takes approximately 8 minutes to travel to Earth. If the Sun were to suddenly vanish, how long would it be before we on Earth would become aware of its disappearance?

Accepted Answer

C) Approximately 8 minutes

Answer

A) Immediately

Answer

B) Approximately 1 second

Answer

D) Approximately 8 hours