Unit 6 Exam Quiz

The Hertzsprung-Russell diagram shows how the sun is classified among the stars. A star that is several thousand times brighter than the sun with a temperature lower than 4,000 K would be classified as

• A main sequence star in spectral class B

• A supergiant in spectral class K

• A main sequence star in spectral class K or M

• A white dwarf in spectral class B

Barnard’s Star is about 5.9 light-years from the sun. The star has an approximate temperature of 2,800 K. Based on the diagram, what spectral class does Barnard’s Star belong to?

• B

• A

• F

• O

• M

The data table below provides information on four stars as collected by astronomers on Earth. Which of the stars according to the information, is moving toward us?

• Star 1

• Star 2

• Star 3

• Star 4

Which of these changes would likely occur if the rate of Earth’s rotation on its axis is increased?

• The length of the seasons would be longer

• The length of the seasons would be shorter

• The length of a day would be shorter

• The length of a day would be longer

Earth would not have seasons if it-

• no longer tilted on its axis

• stopped rotating on its axis

• took an additional month to orbit the sun

• revolved around the sun in the opposite direction

Tags

NGSS.MS-ESS1-1

Choose the correct number: The diagram below shows four positions in Earth’s orbit around the sun. The Northern Hemisphere experiences the beginning of spring when earth is in - The diagram below shows four positions in Earth’s orbit around the sun. The Northern Hemisphere experiences the beginning of spring when earth is in -

• Position 1

• Position 2

• Position 3

• Position 4

Tags

NGSS.MS-ESS1-1

Gravity is an invisible force that cannot be seen. Gravitational pull explains why-

• all the planets in the solar system orbit the sun

• the inner planets orbit e Sun, and the other planets do not orbit the Sun

• only the planet Earth orbits the sun

• the Milky Way galaxy orbits the Sun

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The model below shows the asteroid belt that lies between the orbits of Mars and Jupiter. The asteroid belt consists of a number of rocky bodies known as asteroids that orbit the Sun. The asteroids can be pulled out of the asteroid belt by the -

• light that Earth’s moon emits.

• electromagnetic force of the Sun.

• heat that the Sun emits.

• gravitational force of a nearby planet.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Four students are asked to describe a nebula and a star. Their responses are shown in the table below. Which student described these two celestial bodies correctly?

• Student 1

• Student 2

• Student 3

• Student 4

Why does Earth get more energy from the Sun than from all the other stars in the universe combined?

• The sun is much larger than the other stars.

• The sun is much hotter than the other stars.

• The sun is much more dense than the other stars.

• The sun is much closer than the other stars.