Practice ACP #2

According to Kepler’s laws of planetary motion, which of the following statements is true?

• The planets orbit the Sun in circular paths

• While orbiting the Sun, planets sweep out equal areas in equal amounts of time

• Planets located further from the Sun have shorter periods than planets located nearer to the Sun

• While orbiting the Sun, the closer the planet is to the Sun, the slower it travels

Which of the following statements about the Moon is NOT true?

• Only one side of the Moon is seen from Earth

• The Moon only rotates once in one orbit around the Earth

• The Moon has absolutely no atmosphere

• The gravitational acceleration on the surface of the Moon is approximately one-sixth of the gravitational acceleration on the surface of the Earth

Between which two planets is the asteroid belt located?

• Saturn and Uranus

• Jupiter and Saturn

• Earth and Mars

• Mars and Jupiter

Which of the following apparent colors of stars indicates the coolest temperature?

• Orange

• Yellow

• red

• orange

The Earth's magnetic field protects it from:

• Excess heat from the Sun

• Radio waves from black holes

• Solar Wind

• Impacts from space debris

Which of the following is considered observational evidence in support of the Big Bang Theory?

• Expansion in the redshifts of galaxies

• Measurements of cosmic microwave background radiation

• Measurements of the distribution of quasars and galaxies

• All of the above

Redshift is observed when:

• A light-emitting object moves away from an observer

• A star begins to decrease the amount of light it emits

• A light emitting object moves toward an observer

• A magnetic field bends observed light

Which of the following statements best describes the physical structure of the universe?

• Galaxies are the largest structures in the universe, and they are distributed evenly throughout space

• Superclusters are the largest structures in the universe, and they are distributed evenly throughout space

• Superclusters are the largest structures in the universe, and they are unevenly distributed so that large voids exist in space

• Filaments are the largest structures in the universe, and they surround large, bubble-like voids

Which of the following statements about galaxies is true?

• Galaxies are the only structures in the universe that do not contain dark matter

• Galaxies are gravitationally bound, meaning structures within the galaxy orbit around its center

• Galaxies typically contain over one trillion stars

• Galaxies are composed of clusters and superclusters

The structure of the Milky Way galaxy is best described as:

• Spiral

• Starburst

• Elliptical

• Irregular