Astronomy Unit Review Question Preview (ID: 45333)


Astronomy Review. TEACHERS: click here for quick copy question ID numbers.

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

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

The sun produces energy by
a) attracting it with the force of gravity.
b) nuclear fission
c) burning fuels such as oil.
d) nuclear fusion

A pattern or grouping of stars imagined by people to represent a figure is a
a) star chart
b) seasonal pattern
c) constellation
d) mythological object

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

Which of the following is a major difference between elliptical galaxies and spiral galaxies?
a) Elliptical galaxies have almost no gas or dust between the stars.
b) Elliptical galaxies vary more in shape than spiral galaxies.
c) Spiral galaxies have almost no gas or dust between the stars.
d) Spiral galaxies contain only old stars.

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

What do all of the inner planets have in common?
a) They all have rings.
b) They all have abundant liquid water.
c) They all have many moons.
d) They all are small and have rocky surfaces.

What do the four outer planets have in common?
a) They are much larger than Earth and are made mainly of hydrogen and helium.
b) They are about the same size as Earth and are made mainly of hydrogen and helium.
c) They are much larger than Earth and are make mainly of iron.
d) They are about the same size as Earth and are made mainly of iron.

The solar wind is a stream of electrically charged particles that extend outward from the sun's
a) chromosphere
b) photosphere
c) corona
d) core

What layer are you looking at when you look at an image of the sun?
a) photosphere
b) chromosphere
c) corona
d) prominence

In the Southern Hemisphere, the summer solstice occurs when the sun is
a) at the equator.
b) farthest south.
c) farthest north.
d) closest to Earth.

All objects are attracted to each other by the force of
a) weight.
b) mass.
c) inertia.
d) gravity.

The strength of the force of gravity depends on
a) the masses of the objects and their speeds.
b) the masses of the objects and the distance between them.
c) the weight of the objects and their speeds.
d) the masses of the objects and their weights.

One complete revolution of the Earth around the sun takes about
a) one year
b) one totation
c) one season
d) one eclipse

Earth has seasons because
a) it rotates on its axis
b) the distance between Earth and the sun changes.
c) its axis is tilted as it moves around the sun.
d) the temperature of the sun changes.

Eclipsing binary stars can sometimes be identified because
a) they are brighter than any single star.
b) they are all white dwarfs.
c) they become dimmer at regular intervals.
d) they are cool red stars.

From the cosmic background radiation, scientists can infer that, just after the big bang, the universe must have been
a) very small.
b) hot.
c) the same average temperature as it is today.
d) cooler than it is today.

According to Hubble's law, the farther away a galaxy is,
a) the faster it is moving toward us.
b) the slower it is moving towards us.
c) the slower it is moving away from us.
d) the faster it is moving away from us.

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