WorksheetsUnit 12 Lesson 3 What Are Stars and Galaxies?
Total questions: 13
Worksheet time: 7mins
The sun is a medium-sized star, but it appears much larger than other stars. Why does the sun appear to be so large?
The sun is hotter than other stars.
The sun is affected by Earth’s gravity more than other stars are.
The sun is much closer to Earth than other stars are.
The sun produces more light than other stars.
Unlike planets, stars make their own light and glow very brightly. Stars are made mostly of what material?
very hot metal
carbon and oxygen
extremely hot rock
glowing, hot gases
There are many different colors of stars. Which characteristic determines the color of a star?
temperature
distance from Earth
actual brightness
size and shape
A galaxy is composed of billions of stars held together by gravity. The illustration below shows one common type of galaxy.
What type of galaxy is shown in the illustration?
barred spiral
spiral
spinning
. elliptical
The diagram below shows the Milky Way galaxy.
Which letter best shows the location of our solar system?
W
X
Y
Z
Some galaxies have symmetrical shapes. Other galaxies look jumbled.
What term do astronomers use to describe a galaxy such as the one shown in the illustration?
barred spiral galaxy
spiral galaxy
irregular galaxy
elliptical galaxy
Elliptical galaxies are brightest toward the center. Which of these statements best explains this observation?
The stars are evenly distributed throughout the galaxy.
The stars are spread throughout the galaxy in bands that look like the arms of spiral galaxies.
Most of the stars are near the outside of the elliptical galaxy, with dust clouds in the center.
The center is crowded with stars, and the number of stars decreases farther out.
There are several types of galaxies. How do scientists classify galaxies?
by size
by number of stars
by temperature
by shape
Each of the images below shows two stars of the same color. Which picture and statement is correct?
All visible stars in the night sky are many times larger than Earth. Why do they look like tiny points of light?
They are moving very fast.
Most of the light from stars is absorbed by galaxies, so it does not reach Earth.
The stars visible at night are located very far from Earth.
The atmosphere blocks most of their light.
When compared to other stars, the sun is not very unusual. However, the sun is very important to humans. What makes the sun more important to us than the other stars?
Unlike other stars, the sun is very large.
When compared to other stars, the sun is very close to Earth.
Unlike other stars, the sun is the right color for living things.
When compared to other stars, the sun is the hottest.
There are two types of spiral galaxies. What is a difference between a barred spiral galaxy and a normal spiral galaxy?
the number of spiral arms
the colors of the stars in the galaxy
the number of stars in the galaxy
the shape of the galaxy’s center
Mariam is creating a notebook with diagrams for each of the different kinds of galaxies.
What label should Mariam use for the galaxy shown above?
What type of galaxy is shown in the illustration?
barred spiral galaxy
Normal spiral galaxy
spinning galaxy
elliptical galaxy
