Big Bang Theory Review

What can the spectrum of a star tell us?

• Age of the star
• Star's chemical composition
• Star's elements
• Star's chemical composition & elements

What spectrum is one that it is an uninterrupted band of color?

• Absorption
• Emission
• Continuous
• None of the above

What spectrum is one that is a continuous spectrum with dark lines running through it?

• Absorption
• Emission
• Continuous
• None of the above

What spectrum is one that is a series of bright lines of particular wavelengths produced by a hot gas under low pressure?

• Absorption
• Emission
• Continuous
• None of the above

What spectra do we use for most stars?

• Absorption
• Emission
• Continuous
• None of the above

What is the apparent change in frequency of electromagnetic or sound waves caused by the relative motions of the source and the observer?

• Doppler effect
• Microwaves
• Speed of light
• Infrared

As an ambulance is going away the pitch is _____________.

• lower
• higher

As an ambulance is going away the wavelengths _____________.

• increase
• decrease

As a light source (star) is moving away from the observer, the light becomes __________

• Greener
• Yellower
• Redder
• Bluer

What is the name of our Galaxy

• Andromeda
• Dwarf Galaxy
• Milky Way
• None of the above