Stars and Galaxies

What do you call a group of stars in the sky usually named for animals or people in stories?

• galaxy

• comet

• constellation

• black hole

The Milky Way Galaxy is a(n) _____ galaxy.

• elliptical

• spiral

• irregular

• dwarf

Tags

NGSS.MS-ESS1-2

What are the three types of galaxies?

• spiral, irregular, and elliptical

• twisted, random, and chaotic

• oblong, circular, and square

• straight, crooked, and curvy

Where will a star most likely form?

• a black hole

• a neutron star

• an extremely dense cloud of space dust and gas

• a young star that has just entered the main sequence

Stars are composed primarily of which elements?

• argon and neon

• carbon and iron

• hydrogen and helium

• oxygen and nitrogen

Tags

NGSS.HS-ESS1-3

If you are looking at the Big Dipper in the night sky, what are you looking at?

• a huge ladle in the moon

• the tail of a comet

• a full moon covered by clouds

• a natural arrangement of stars

Based on the Hertzsprung-Russel diagram, which group of stars would be cooler and brighter?

• main sequence stars

• giants

• supergiants

• white dwarfs

Tags

NGSS.HS-ESS1-3

Scientists can classify stars based on their _____ and _____.

• Temperature, color

• shape, chemistry

• density, composition

• None of the above

The explosion of a star is referred to as a _____.

• black hole

• supernova

• red giant

• neutron star

A student is shown a picture of a large number of stars clumped together without a discernible shape. The student argues that these stars cannot be a galaxy because all galaxies have familiar shapes such as elliptical and spiral. Is the student correct?

• Yes. These stars cannot be a galaxy if they do not form a familiar shape.

• The stars cannot be a galaxy, but the student incorrectly lists "elliptical" as a possible shape. All galaxies are spiral.

• Although all galaxies have familiar shapes, no single image can capture an entire galaxy. If the student could see the entire galaxy, it would have a familiar shape.

• No. The stars could be part of an irregular galaxy.