Planetary Composition

Each element has its own wavelength of light it emits/absorbs.

• True
• False

What's the BEST way to know the chemical composition of a planet?

• From their light
• Getting a sample
• From their density
• None of these

When light reaches us from a planet, it has also passed through...

• the sun's atmosphere
• the earth's atmosphere
• Both of these
• None of these

When looking at the spectrum of light we get from a planet, what needs to be accounted for?

• The Earth's atmosphere
• The Sun's atmosphere
• The planet's atmosphere
• All of the above

Higher density planets contain elements like iron.

• True
• False

Which moon is the only one with a substantial atmosphere?

• Titan
• Our Moon
• Europa
• Ganymede

Does Pluto have an atmosphere?

• Always
• Never
• Only when it is close to the sun
• Only when it is far from the sun

Which is false about UV and infrared light?

• Not much can pass through our atmosphere
• It is not useful in finding a planet's composition.
• UV light revealed that Titan contains Nitrogen.
• Infrared discovered carbon in Titan's atmosphere.

When light shines on a solid surface...

• Some wavelengths are absorbed, while others are reflected.
• None of these.
• All wavelengths are scattered.
• All wavelengths are absorbed.

Solids give off distinct, sharp spectral lines, just like gases.

• True
• False