Unit 4 Lessons 1-3 Review

The sun has the highest apparent brightness to Earth because it ________________.

• Is closer to Earth than any other star

• Is larger than any other star

• Produces more light than other stars

• Is hotter than other stars

Distances in space are so great, they are often measured in __________.

• Meters

• Light-years

• Feet per second

• Centimeters

Tags

NGSS.MS-ESS1-3

Why does only a small part of a star's light reach Earth?

• The sun absorbs most of the light

• The atmosphere blocks most of the light

• The light is destroyed by the darkness of space

• The light spreads out as it moves through space

The intense __________ at the core of a star causes it to produce light.

• Heat

• Sound

• Cold

• Gravity

Tags

NGSS.HS-ESS1-1

What claim can Marnie make about which of the three stars will have the greatest apparent brightness when viewed from Earth?

• Star A, because it is closest to Earth.

• Star B, because it is farther away from the other stars.

• Star C, because it is farthest from Earth.

• All the stars will have the same apparent brightness because she is using a telescope.

Based on the information in the data table, how should Colin organize the stars based on a scale of brighter apparent brightness to dimmer apparent brightness?

• Star A, Star B, Star D, Star C

• Star A, Star C, Star B, Star D

• Star B, Star C, Star D, Star A

• Star C, Star B, Star A, Star D

Cecily and her brother Michael locate the star Betelgeuse. Betelgeuse is located 643 light-years away from Earth. It is also at least ten times larger than our sun. Michael asks Cecily why Betelgeuse seems much smaller than our sun if it is so much larger than our sun. What explanation can Cecily give to Michael to explain this phenomena?

• Light from larger stars like Betelgeuse is weaker than light from smaller stars like the sun.

• Betelgeuse do not travel as far as light rays from smaller stars like the sun.

• Light rays from Betelgeuse must spread much farther than light rays from the sun before reaching Earth.

• Light rays from stars that are far from Earth, like Betelgeuse, are absorbed by stars that are closer to Earth, like the sun.

Tags

NGSS.MS-ESS1-3

What is apparent brightness?

• A measurement describing how bright a star looks from the moon.

• A measurement describing how far a star is from the moon.

• A measurement describing how bright a star looks from Earth.

• A measurement describing how far a star is from Earth.

What is a light-year?

• A unit of measurement used to describe distances between stars in space. One light-year is the distance that light travels in one year.

• A unit of measurement used to describe distances between a star and Earth.

• A unit of measurement used to describe distances between stars in space. One light-year is the distance that light travels in three years.

• A unit of measurement used to describe the distance between the sun and Earth.

The hotter a star is, the ____________.

• Bigger it is.

• Dimmer it is.

• Colder it is.

• Brighter it is.