Unit 5 Lesson 3 Review

Which of these are objects that circle stars other than Earth's sun?

• exoplanets

• nebulas

• moons

• planetesimals

What type of galaxy is the Milky Way?

• elliptical

• spiral

• spherical

• irregular

Which description would most likely apply to an older star?

• is composed mostly of helium, is blue, and is located in a galactic cluster

• is composed mostly of carbon, is yellow, and is located in a globular cluster

• is composed mostly of lithium, is white, and is located in a galactic cluster

• is composed mostly of hydrogen, is red, and is located in a globular cluster

An Open Cluster is

• billions of years old

• bigger than a globular cluster and blue in color

• blue in color and younger than a globular cluster

• red in color

We are able to tell that a distant planet is orbiting a star by all of the ways except

• The explosion of a planet running into the star

• The doppler shift of a planet going around the star

• The transit of the planet in front of the star

• The stars wobbling

A light-year is

• The distance light travels in a year

• The time it takes for light to travel in a year

• The distance between the Earth and the Sun

• The time it takes light to travel from the Earth to the sun

An astronomical unit is

• The average distance from the Earth to the sun

• The distance light travels in a year

• The maximum size an astronaut can be to go to space

• The time it takes for light to travel from the Earth to the sun

Which group of characteristics could you infer was observed by studying a star cluster?

• Observations indicate an irregularly shaped structure with many closely spaced stars. Spectra indicate older and cooler stars.

• Observations indicate a well-shaped structure with many closely spaced stars. Spectra indicate dominantly hotter stars.

• Observations indicate a well-shaped structure with many closely spaced stars. Spectra indicate dominantly younger stars.

• Observations indicate an irregularly shaped structure with many closely spaced stars. Spectra indicate hotter, younger stars.

Which of the following statements is true?

• Globular Clusters are red in color

• Open clusters are older than globular clusters

• Globular clusters are smaller than open clusters

• Open clusters are green in color

If the following are listed in order from smallest to largest, where would globular clusters fit in this sequence in their size? Sun, Solar System, Oort Cloud, Milky Way, Local Group, Virgo Super Cluster, Universe

• Between The Sun and Solar System

• Between the Oort Cloud and Milky Way

• Between the Local Group and Virgo Super Cluster

• Between the Virgo Super Cluster and Universe