Universe Unit Practice

True or FalseThe Earth's Sun is classified as a main sequence star

• True
• False

What determines the color of a star? 

• It's size
• It's temperature
• It's composition
• They are all the same color 

Which star has the lowest temperature?

• A
• B
• C
• D

According to the diagram, which of these types of stars has the greatest luminosity?

• Cool super giant

• Cool main sequence star

• Hot main sequence star

• Cool giant

The Sun is a medium-sized star that is closer to the Earth than any other star.  Where is the Sun located?

• In the spiral arm of the Andromeda galaxy

• In the center of the Andromeda galaxy

• In the center of the Milky Way galaxy.

• In the spiral arm of the Milky Way galaxy.

Which statement best explains why the sun appears brighter to people on Earth than any other star?

• Sunlight reaches Earth's atmosphere at an angle that causes the sun's light rays to intensify.

• Unique chemical reactions in the sun's core produce a high-energy wavelength of light.

• The sun burns at a higher temperature than any other star.

• The sun is closer to Earth than any other star.

Earth’s atmosphere blocks short wavelengths of the electromagnetic spectrum. Use the diagram to determine which telescopes must be placed in orbit around Earth in order to observe short-wavelength radiation?

• Gamma ray telescopes

• Visible light telescopes

• Infrared telescopes

• Radio telescopes

Which elements are present in the mixture?

• D and E

• D and G

• E and G

• only D

• only G

Which has the LONGEST wavelength and, therefore, the lowest frequency/energy

• Gamma Rays
• Radio Waves
• Visible Light
• Infrared rays

Which section of the spectrum is the ONLY one we can see?

• X-rays
• Visible Light
• Gamma Rays
• Ultraviolet Rays