01.The two main reasons we use large telescopes for observations in astronomy are:
A. Magnification and clarity.
B. Magnification and resolution.
C. Magnfication and optical quality.
D. Light gathering power and resolution.
Answer: D
02. Earthquakes occur ________
A. In the hydrosphere.
B. In the magnetosphere.
C. In the lithosphere.
D. In the atmosphere.
Answer: C
03. Atoms are composed of
A. Amorphous carbon-like particles
B. Nuclei with the same number of protons and neutrons
C. A nucleus of protons and neutrons orbited by electrons
D. Debris mostly left over from atomic explosions
Answer: C
04. The approximate temperature of the sun's "surface" is _______
A. 5800 k
B. 1.99 x 10^30 k
C. 8-10 million k
D. 1-2 million k
Answer: A
05. The "runaway greenhouse effect" occurred on which planet?
A. Mercury
B. Mars
C. Earth
D. Venus
Answer: D
06. Different types of electromagnetic radiation (x-rays, infrared, radio,etc.)
A. Travel at different speeds in a vacuum
B. Have different amounts of energy for each photon
C. Jave the same wavelength
D. Do not always obey the inverse square law
Answer: B
07. When you double the frequency of a wave, you
A. Decrease the wavelength by two.
B. Increase the amplitude by two.
C. Increase the wavelength by two.
D. Decrease the amplitude by two.
Answer: A
08. Apparent magnitude is a measure of
A. The brightness of a star, as seen from the earth.
B. The surface temperature of a star.
C. The size (diameter) of a star.
D. The intrinsic brightness (actual light output) of a star.
Answer: A
09.Light can be described
A. only as a photon
B. both as a wave and as a particle
C. only as a particle
D. only as a wave
Answer: B
10. Waves or rays of the electromagnetic spectrum arranged according to increasing wavelength include:
A. x-rays, ultraviolet, red, orange
B. radio, yellow, millimeter
C. infrared, radio, gamma rays
D. gamma rays, x-rays, radio
Answer: D
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