Questions and answers for exam Preparation

MCQs

Total Questions : 10

Question 1.

What do astronomers mean by a constellation?

A constellation is a region in the sky as seen from Earth.
A constellation is a group of stars related through an ancient story.
A constellation is any random grouping of stars in the sky.
A constellation is a group of stars that are all located in about the same place in space.

Discuss Question

Answer: Option D. -> A constellation is a group of stars that are all located in about the same place in space.
:
D

Question 2.

If our year were twice as long (that is, if Earth took twice as many days to complete each orbit around the Sun), but Earth's rotation period and axis tilt were unchanged, then

stars would take twice as long to rise and set
the cycle of precession would take 13,000 years instead of 26,000 years
the four seasons would each be twice as long as they are now
Earth would not have seasons

Discuss Question

Answer: Option C. -> the four seasons would each be twice as long as they are now
:
C

Question 3.

How does Earth's varying distance from the Sun affect our seasons?

It doesn't—Earth's orbital distance plays no obvious role in the seasons.
It makes summer warmer in the Northern Hemisphere than in the Southern Hemisphere.
It is responsible for the fact that the seasons are opposite in the Northern and Southern hemispheres.
It causes the seasons to be more extreme than they would be if Earth's distance from the Sun the same were always.

Discuss Question

Answer: Option A. -> It doesn't—Earth's orbital distance plays no obvious role in the seasons.
:
A

Question 4.

People of central Africa predicted the weather by

recording the seasonal changes in average temperature.
observing the path of the planets across the sky.
observing the length of the lunar cycle.
observing the orientation of the crescent moon relative to the horizon.

Discuss Question

Answer: Option D. -> observing the orientation of the crescent moon relative to the horizon.
:
D

Question 5.

The path that led to modern science emerged from ancient civilizations in which part of the world?

Central and South America
the Mediterranean and the Middle East
North America
China

Discuss Question

Answer: Option B. -> the Mediterranean and the Middle East
:
B

Question 6.

All of the following statements are true. Which one explains the reason that there is not a solar eclipse at every new moon?

The nodes of the moon's orbit precess with an 18-year period.
The orbital plane of the moon is tilted slightly (by about 5 degrees) to the ecliptic plane.
The moon rotates synchronously with its revolution about Earth.
The Moon goes through a complete cycle of phases about every 29 1/2 days.

Discuss Question

Answer: Option B. -> The orbital plane of the moon is tilted slightly (by about 5 degrees) to the ecliptic plane.
:
B

Question 7.

How did Eratosthenes estimate the size of Earth in 240 B.C.?

by observing the duration of a solar eclipse
by measuring the size of Earth's shadow on the Moon in a lunar eclipse
by comparing the maximum altitude of the Sun in two cities at different latitudes
by sending fleets of ships around Earth

Discuss Question

Answer: Option C. -> by comparing the maximum altitude of the Sun in two cities at different latitudes
:
C

Question 8.

Suppose you live in the United States and you see a crescent moon in your evening sky tonight. What will a friend in South America see tonight?

Your friend will see a gibbous moon.
Your friend will see a crescent moon.
Your friend will see a first quarter moon.
Your friend won't see the Moon tonight, because it is up only in the morning.

Discuss Question

Answer: Option B. -> Your friend will see a crescent moon.
:
B

Question 9.

In any particular place on Earth, certain constellations are visible in the evening only at certain times of the year because

our evening view of space depends on where Earth is located in its orbit around the Sun.
during some times of the year, some constellations drop below the southern horizon.
some constellations are circumpolar.
on any particular night, we can see only stars that are directly opposite (180° away from) the Sun in the sky.

Discuss Question

Answer: Option A. -> our evening view of space depends on where Earth is located in its orbit around the Sun.
:
A

Question 10.

The Sun's path, as viewed from the equator, is highest on