EAPS 105 EXAM Q&A
Which arrangement is in order of increasing size, left to right? - Answer-• Planet, star,
solar system, galaxy
Which of the following is the largest? - Answer-• The distance from the Earth to the sun
What causes seasons? - Answer-• The sun spends less time in the sky during winter
than summer.
• The Sun's rays spread out more in winter than in summer.
• The suns rays are more spread out over the Earth in the winter
• Larger Tilt - Answer-Poles get more light/heat in the summer, ice melts
• Smaller Tilt - Answer-Poles get less light/heat in the summer, ice builds up
Lunar Eclipse - Answer-Sun. Earth, and Moon are all in line with the Earth being
inbetween the Sun and the moon
Solar Eclipse - Answer-Sun, Moon, and Earth are all in line with the Moon being
inbewteen the Sun and the Earth
Solar eclipses only occur when the phase of the moon is - Answer-• New
Why don't we get an eclipse every month? - Answer-• The moon is only in the same
plane as the Earth AND Sun at the same time twice per year
Occam's Razor - Answer-When two hypotheses can both explain an observation, the
hypothesis that requires fewer assumptions should be favored. (the simplest
explanation is probably true)
The Geocentric Model - Answer-Earth is the center of our solar system, Mercury,
Venus, and the Sun revolve around the Earth
Under the geocentric model will Venus ever show a gibbous phase to an observer on
Earth?: - Answer-NO
Heliocentric model - Answer-Sun is at the center of the solar system
Galileo - Answer-was the first person to document his observations of celestial objects
with a telescope.
Keplerian Orbit - Answer-Ellipse
, Parallax - Answer-nearby objects shift more than faraway objects with perspective
changes.
Kepler's Laws: - Answer-• Orbits are ellipses with the sun at one focus
• Eccentricity: how oblong an ellipse is
• Orbits sweep out equal areas in equal times
• Orbital period squared is proportional to average distance cubed
Based on Kepler's 2nd law - Answer-a plant goes faster when it is near the sun than far
away from the sun.
Based on Kepler's 3rd law - Answer-a planet farther from the sun moves more slowly
than one closer to the sun
Short wavelength - Answer-high frequency
Long wavelength - Answer-low frequency
When we split up light by wavelength this creates a - Answer-SPECTRUM
Long wavelengths---------Short wavelengths - Answer-Radio, microwave, infrared,
visible, ultraviolet, x-ray, gamma ray
Which type of radiation has wavelengths longer than visible light? - Answer-• Infrared
Why did scientists mount the infrared telescope Sofia on a 747 airplane? - Answer-•
Infrared radiation is absorbed by atmosphere
Telescopes: - Answer-• The focus is incoming light is bent into a bright point
• Objective Lens: gathers light and bends it into focus
ReFRACTING: - Answer-telescope: lens focuses light
ReFLECTING - Answer-concave mirror focuses light
Bigger telescopes collect more light from the same object (Bigger is Better) - Answer-
Hubble Space Telescope - Answer--launched in 1990, maintained and upgraded by
several space shuttle service missions throughout the 1990s and early 2000s
How do you get images back from a satellite in space? - Answer--CDC=charge coupled
device, allow images to be digitally transmitted from spacecraft and analyzed on a
computer, much more sensitive than photographic film and operate at more
wavelengths
-Inside all modern cameras
-Reads light as an electric signal, like a solar cell
Which arrangement is in order of increasing size, left to right? - Answer-• Planet, star,
solar system, galaxy
Which of the following is the largest? - Answer-• The distance from the Earth to the sun
What causes seasons? - Answer-• The sun spends less time in the sky during winter
than summer.
• The Sun's rays spread out more in winter than in summer.
• The suns rays are more spread out over the Earth in the winter
• Larger Tilt - Answer-Poles get more light/heat in the summer, ice melts
• Smaller Tilt - Answer-Poles get less light/heat in the summer, ice builds up
Lunar Eclipse - Answer-Sun. Earth, and Moon are all in line with the Earth being
inbetween the Sun and the moon
Solar Eclipse - Answer-Sun, Moon, and Earth are all in line with the Moon being
inbewteen the Sun and the Earth
Solar eclipses only occur when the phase of the moon is - Answer-• New
Why don't we get an eclipse every month? - Answer-• The moon is only in the same
plane as the Earth AND Sun at the same time twice per year
Occam's Razor - Answer-When two hypotheses can both explain an observation, the
hypothesis that requires fewer assumptions should be favored. (the simplest
explanation is probably true)
The Geocentric Model - Answer-Earth is the center of our solar system, Mercury,
Venus, and the Sun revolve around the Earth
Under the geocentric model will Venus ever show a gibbous phase to an observer on
Earth?: - Answer-NO
Heliocentric model - Answer-Sun is at the center of the solar system
Galileo - Answer-was the first person to document his observations of celestial objects
with a telescope.
Keplerian Orbit - Answer-Ellipse
, Parallax - Answer-nearby objects shift more than faraway objects with perspective
changes.
Kepler's Laws: - Answer-• Orbits are ellipses with the sun at one focus
• Eccentricity: how oblong an ellipse is
• Orbits sweep out equal areas in equal times
• Orbital period squared is proportional to average distance cubed
Based on Kepler's 2nd law - Answer-a plant goes faster when it is near the sun than far
away from the sun.
Based on Kepler's 3rd law - Answer-a planet farther from the sun moves more slowly
than one closer to the sun
Short wavelength - Answer-high frequency
Long wavelength - Answer-low frequency
When we split up light by wavelength this creates a - Answer-SPECTRUM
Long wavelengths---------Short wavelengths - Answer-Radio, microwave, infrared,
visible, ultraviolet, x-ray, gamma ray
Which type of radiation has wavelengths longer than visible light? - Answer-• Infrared
Why did scientists mount the infrared telescope Sofia on a 747 airplane? - Answer-•
Infrared radiation is absorbed by atmosphere
Telescopes: - Answer-• The focus is incoming light is bent into a bright point
• Objective Lens: gathers light and bends it into focus
ReFRACTING: - Answer-telescope: lens focuses light
ReFLECTING - Answer-concave mirror focuses light
Bigger telescopes collect more light from the same object (Bigger is Better) - Answer-
Hubble Space Telescope - Answer--launched in 1990, maintained and upgraded by
several space shuttle service missions throughout the 1990s and early 2000s
How do you get images back from a satellite in space? - Answer--CDC=charge coupled
device, allow images to be digitally transmitted from spacecraft and analyzed on a
computer, much more sensitive than photographic film and operate at more
wavelengths
-Inside all modern cameras
-Reads light as an electric signal, like a solar cell
