Astronomy Ultimate Astronomy 3

Question 1

Which layer of the Sun is the visible surface that we see in ordinary light?

Accepted Answer

Photosphere

Answer

The photosphere is the Sun's visible surface where most sunlight is emitted.

Question 2

What is the primary composition of a comet's nucleus?

Accepted Answer

Ice and dust

Answer

Comet nuclei are 'dirty snowballs' made of ice, frozen gases, and dust.

Question 3

Which unit is defined as the average distance between the Earth and the Sun?

Accepted Answer

Astronomical unit

Answer

One astronomical unit (AU) equals about 149.6 million kilometers, the Earth-Sun distance.

Question 4

What phenomenon occurs when the Moon passes directly between the Sun and Earth?

Accepted Answer

Solar eclipse

Answer

A solar eclipse happens when the Moon blocks the Sun as seen from Earth.

Question 5

Which planet is known for its prominent and extensive ring system?

Accepted Answer

Saturn

Answer

Saturn has the most visible and extensive ring system, made of ice and rock particles.

Astronomy Practice Test