When light having a continuous spectrum passes through a cool gas, the resulting spectrum is:

Select one:

a. an absorption spectrum

b. Any of the choices listed, depending on the chemical composition of the gas.

c. an emission spectrum

d. a continuous spectrum

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Which of the following features determines the resolving power of a telescope?

Select one:

a. The focal length of the eyepiece.

b. The diameter of the objective.

c. The diameter of the eyepiece.

d. The focal length of the objective.

Suppose that you have a (good) reflecting telescope and a (good) refracting telescope with the same diameter objective. Which one has an objective that did not require correction for chromatic aberration as it was constructed?

Select one:

a. No general statement can be made.

b. Both

c. Neither

d. The reflector

e. The refractor

The number of sunspots

Select one:

a. becomes maximum near the poles.

b. has been increasing since they were first recorded.

c. changes with a cycle of about 11 years.

d. has been decreasing since they were first recorded by Galileo.

Which of the following can be detected by using the Doppler effect?

Select one:

a. The rotation of planets

b. The radial motion of a star moving toward the Earth

c. The rotation of the Sun

d. The motion of binary star systems

e. All of the motions listed can be detected in this manner.

What keeps the Sun from collapsing due to its strong gravitational field?

Select one:

a. The Sun’s interior is cooler than its surface.

b. The Sun’s interior cannot be compressed.

c. Pressure at each part of the Sun balances the weight of the material above it.

The energy of a photon is directly proportional to the light’s

Select one:

a. frequency.

b. temperature.

c. wavelength.

The sun emits most of its visible light in the_____ region of the electromagnetic spectrum?

Select one:

a. violet

b. radiowave

c. yellow

d. x-ray

e. blue

The frequency at which a star emits the most light depends on the star’s

Select one:

a. temperature.

b. brightness.

c. eccentricity.

d. velocity toward or away from us.

e. distance from us.

Which of the following waves has the lowest frequency?

Select one:

a. x-ray

b. visible

c. radio

d. gamma rays

e. ultraviolet

Which list shows the colors of stars from coolest to hottest?

Select one:

a. White, blue, red.

b. Red, white, blue.

c. Blue, red, white.

d. Orange, blue, white.

e. Orange, white, red.

The Sun’s atmosphere is

Select one:

a. hotter and much more dense than the Earth’s.

b. hotter and less dense than the Earth’s.

c. cooler and less dense than the Earth’s.

d. about the same temperature and density as Earth’s.

Energy is transported from the Sun to Earth via

Select one:

a. radiation.

b. convection.

c. conduction.

The solar wind is

Select one:

a. light flowing across the surface of the Sun.

b. the motion of granules across the Sun’s surface.

c. charged particles flowing from the Sun out into space.

d. the motion of sunspots across the Sun’s surface.

The primary source of energy for the Sun is a series of nuclear reactions in which

Select one:

a. a helium nucleus fissions to form four hydrogen nuclei.

b. four hydrogen nuclei fuse to form a helium nucleus.

c. two nuclei fuse to form uranium or plutonium.

d. oxygen nuclei combine to form more massive nuclei.

e. uranium nuclei fission to form several other elements.