Stars and EM Spectrum

Images taken by satellites provide information about weather. The top image was taken by a detector that was sensitive to infrared light. The bottom image was taken by a detector that was sensitive to visible. 
What can you conclude from these two images?

• Images of planets can provide many details of their solid surfaces.
• Only one type of radiation can be used to produce photographs and other images.
• Images taken from space provide information that can not be obtained from Earth.
• Images taken with different types of radiation can provide different types of information. 

Gamma rays, visible light, and radio waves are part of the electromagnetic spectrum. The figure below compares these three types of electromagnetic waves. What three properties of these waves are shown in this figure?

• wavelength, frequency, and energy
• refraction, wavelength, and frequency
• energy, reflection, and wavelength
• frequency, visibility, and wavelength. 

Sunlight is composed of energy that is visible to humans and energy that is not visible to humans. Which statement describes how the visible energy from the Sun is different from the nonvisible energy?

• It travels at a different speed through space
• It travels a different distance through space
• It has different wavelengths
• It has different amplitudes

Below are the names of different stars and their colors. Alderbaran(orange)
Spica(blue)
Antares(red)
Sun(yellow)
Put them in order from hottest to coolest.

• Antares, Spica, Sun, Alderbaran
• Sun, Spica, Antares, Alderbaran
• Spica, Sun, Alderbaran, Antares
• Antares, Alderbaran , Sun, Spica

Frank observes the stars through his telescope. He states that the star Regulus is brighter than the star Rigel. In reality, Rigel has a greater absolute brightness than Regulus. What can explain Frank's observations?

• Regulus is a hotter star than Rigel. 
• Rigel is a hotter star than Regulus. 
• Rigel is much closer to Earth than Regulus. 
• Regulus is much closer to Earth than Rigel. 

The astronomy club at a local middle school uses its telescope to observe stars. Some students have identified two celestial objects as being main sequence stars. What is the common characteristic shared by these main sequence stars?

• their masses
• their diameters
• their temperature range
• their distance from Earth

Gloria is at the observatory and is examining a newly discovered star through a powerful telescope. She wants to find out how bright the star actually is. What information does she need to calculate the absolute magnitude of a star?

• color and temperature of the star
• color and composition of the star
• apparent magnitude and distance from Earth of the star
• absolute magnitude and the distance from the Earth of the star

Two stars have the same apparent magnitude as seen from Earth's surface. Star A is 33 ly away. Star B is 346 ly away. Which of the following statements is true?

• StaB is larger tan star A
• Star A is more luminous than star A is.
• The stars have the same absolute magnitude. 
• Star A has a smaller absolute magnitude (luminosity).

How would you best describe our sun?

• massive sized star, with a surface temperature of 20,000 K
• massive sized star, with a surface temperature of 10,000 K
• average sized star, with a surface temperature
• averaged sized star, with a surface temperature of 6,000 K

Scientist have determined that there is a link between the sunspots and and the intensity of solar flares. Of the last sunspot maximum occurred in 2001, when in the future might you expect to see an increase in intensity of solar flares?

• 2007
• 2012
• 2018
• 2021