Earth's Sun and the Solar System Quiz

What is Earth's Sun?

• A planet that gives off heat

• A medium-sized star

• A moon in the galaxy

What percentage of the solar system's mass is made up by the Sun?

• About 50%

• More than 99%

• Less than 10%

Where is the Sun’s energy produced?

• In the photosphere

• In the core

• In the corona

Which layer of the Sun can be seen during a total solar eclipse?

• Chromosphere

• Photosphere

• Corona

What causes solar flares?

• Moonlight

• Intense energy heating the Sun's surface

• Reflection from Earth’s oceans

What is a star?

• A cold ball of dust

• A spinning rock

• A huge ball of hot matter that emits energy

Why do stars appear small in the night sky?

• They are not very bright

• They are smaller than planets

• They are far from Earth

How far is one light year?

• About 9.46 trillion kilometers

• 1 million kilometers

• 365,000 kilometers

Why does the Sun appear brighter than other stars?

• It is the only star that shines

• It is the hottest star

• It is much closer to Earth

What two factors affect a star’s apparent brightness?

• Age and color

• True brightness and distance

• Size and speed