Astronomy Review Chp 4: Question Preview (ID: 19044)

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The electromagnetic spectrum consists of
a) all of the different types of electromagnetic waves.
b) all of the colors of light you can see with your eyes.
c) the distance between the crest of one wave and the crest of the next wave.
d) a band of colors formed when white light passes through a prism.

A range of colors formed when white light passes through a prism is called a
a) photograph.
b) ray.
c) lens.
d) spectrum.

Both reflecting and refracting telescopes are designed to
a) gather and focus visible light.
b) separate visible light from ultraviolet and radio waves.
c) break visible light into colors of the spectrum.
d) work better with short-wavelength radiation.

Reflecting telescopes differ from refracting telescopes in having
a) no eyepiece lens.
b) two large objective lenses.
c) one large objective lens.
d) a mirror instead of an objective lens.

A light-year is
a) 365 days.
b) the distance from Earth to Proxima Centauri.
c) the distance light travels in a year.
d) the amount of light the sun produces in a year.

Parallax is used to determine a star’s
a) composition.
b) brightness.
c) distance from Earth.
d) temperature.

Characteristics used to classify stars include
a) size, distance, and brightness.
b) size, brightness, and temperature.
c) color, brightness, and distance.
d) distance, size, and color.

What color are the coolest stars?
a) blue-white
b) yellow
c) red
d) orange

A star is born when
a) helium and oxygen combine.
b) a protostar begins to cool.
c) a nebula expands.
d) nuclear fusion starts.

The lifetime of a star depends on its
a) apparent brightness.
b) temperature.
c) absolute brightness.
d) mass.

A supernova is the explosion of a dying
a) protostar.
b) low-mass star.
c) medium-mass star.
d) high-mass star.

The absolute brightness of a star depends on its
a) color and temperature.
b) distance and temperature.
c) distance and color.
d) size and temperature.

The Hertzsprung-Russell diagram shows that main-sequence stars
a) are mostly cool and bright.
b) increase in brightness as they increase in temperature.
c) are mostly hot and dim.
d) decrease in brightness as they increase in temperature.

Why are many large optical telescopes located on mountains?
a) to be above part of the atmosphere
b) to be closer to the stars
c) to be closer to city lights
d) because it is easier to build telescopes on mountains

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