Space Systems: The Sun

Which statement correctly explains why looking directly at the sun is harmful to the eyes?

• The radiation from the sun's rays can cause permanent damage to your eyes.

• The radiation from the sun's rays can improve eyesight.

• The radiation from the sun's rays have no effect on the eyes.

• The radiation from the sun's rays can make the eyes stronger.

What type of star is the sun?

• Red giant

• Yellow dwarf

• Blue giant

• White dwarf

What is a vital source of energy for Earth?

• Moon

• Mars

• Sun

• Saturn

What lies at the center of the solar system and affects the planets' orbits?

• Moon

• Mars

• Sun

• Saturn

Read this paragraph from the passage.

Because this energy is so strong, it is dangerous to stare at the sun. Radiation from the sun's rays can damage your eyes. That is why you should never look directly at the sun, even with sunglasses on.

Which text structure does the author use to organize the information?

• Compare and contrast

• Chronology

• Cause and effect

• Sequence

Read this paragraph from the passage.

Stars come in all different sizes and colors. They range from giant stars to dwarf stars.

Giant stars are much larger than the sun. Most dwarf stars are much smaller. Stars with

high temperatures are whitish blue. Stars with cooler temperatures are red.

Which text structure does the author use to organize the information?

• Compare and contrast

• Chronology

• Cause and effect

• Sequence

Read this sentence from the passage.

“Energy is produced in the hot central part called the core.”

What does the word produced mean as it is used in the sentence?

• explained

• made

• mixed

• found

How does the sun prevent itself from collapsing?

• By emitting light and heat

• By absorbing energy from other stars

• By thermonuclear reactions

• By rotating on its axis