6.1: Our Star the Sun Practice Test

A student can see a maple tree outside his house clearly during the daytime, but it is difficult to see it in night. What can be concluded from this observation?

• A. Sun is the source of light.
• B. Sun is the source of heat.
• C. Trees emit light in the daytime.
• D. Trees lose their light by night.

How does the heat from the sun affect the temperature of our atmosphere?

• A. The temperature is always the same.
• B. The temperature is always changing.
• C. The temperature is always hot in the summer.
• D. The temperature is always cold in the winter.

Which of the following is not true of stars?

• A. Hydrogen keeps a star shining.
• B. Stars close to the Earth appear brighter than those far away.
• C. The moon and sun are both stars.
• D. The sun's light is so bright stars can't be seen during the day.

Which of the following statements best describes our sun?

• A. It is one of the smallest stars.
• B. It is one of the largest stars.
• C. It is a medium-sized star.
• D. It is one of the most massive stars.

The sun is a huge sphere of _______________.

• A. burning gases
• B. boiling liquids
• C. melting rocks
• D. erupting light

The dark areas on the Sun's surface, sunspots, are ________ than the surrounding matter.

• A. hotter
• B. cooler
• C. more active
• D. less active

Which is most similar to the Sun in terms of composition?

• A. stars
• B. moon
• C. planets
• D. asteroids

Energy from the Sun reaches Earth. Which of the following does not demonstrate the Sun's energy changing into another form?

• A. a lake remaining warm during the night
• B. the surface of Earth heating up
• C. light brightening a dark room
• D. photosynthesis in a plant

Select the two ways that a star can be categorized

• size
• shape
• temperature
• color

Why does the sun appear so large and bright compared to other stars?