Distances in the Universe

FIRST name

LAST name

PERIOD

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Which of the following accurately presents the hierarchy, from largest to smallest components?

• Galaxy → universe → solar systems → planets
• Universe → galaxies → solar systems → planets
• Galaxy → solar systems → universes → planets
• Solar systems → universe → galaxies → planets

The galaxy we live in is the Milky Way galaxy, and it is a spiral galaxy. Galaxies contains billions of which of the following?

• Smaller galaxies
• Black holes
• Planets
• Stars

Which of the following best describes a galaxy?

• A particle of debris in the solar system that does not act as a satellite of any planet
• A visible body of liquid or frozen crystal droplets suspended above a planetary surface
• A massive system of stars, gas, dust, and dark matter bound together by gravity
• The visible path of a meteoroid as it enters Earth’s atmosphere

Which of the following is the most accurate description of all known space?

• The galaxy contains thousands of universes, and each universe contains millions of stars.
• The universe contains hundreds of galaxies, and each galaxy contains thousands of stars.
• The galaxy contains hundreds of universes, and each universe contains thousands of stars.
• The universe contains billions of galaxies, and each galaxy contains billions of stars.

Carlos is building a model of the solar system. He needs to build the model’s components with correct proportions to each other. Which of the following accurately presents the hierarchy of components, from smallest to largest, for Carlos’s model?

• Planets → solar systems → galaxies → universe
• Universe → galaxies → solar systems → planets
• Planets → solar systems → universes → galaxy
• Solar systems → universe → galaxies → planets

Haley is working with other students, each one doing research on something in the universe. So far, the only thing that Haley knows about her topic is that these objects are relatively small and that they sometimes have a solid, rocky surface. What is Haley’s research topic?

• Planets
• Galaxies
• Stars
• Solar systems

Stars are made up of gas, and they vary in size. The number of stars in a galaxy can best be described as which of the following?

• Less than 100
• Several hundred
• A few million
• Many billions