Universe Test Review 2025

What is a galaxy?

• a star and it's surrounding planets
• billions of stars, gas, & dust held together by gravity

• the big bang
• a cluster of nebulas

We used a balloon to represent the outcomes of the Big Bang. If the dots were galaxies, what did the measurements each time we blew the balloon up more prove?

• the universe is expanding

• the universe is shrinking

• Galaxies get larger

• Things move really fast in space

The life cycles of stars are determined by their:

• mass (size)
• color
• distance from Earth
• luminosity

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Our sun is currently in what star stage?

• Protostar
• Nebula
• Main Sequence
• Red Giant

Tags

NGSS.HS-ESS1-1

Most stars are made of which elements?

• Hydrogen only
• Hydrogen and Lithium
• Hydrogen and Sodium
• Hydrogen and Helium

Tags

NGSS.HS-ESS1-3

When a massive star begins to cool and expand it is known as a _______________.

• Blue Supergiant
• Red Giant
• Red Supergiant
• White Dwarf

Tags

NGSS.HS-ESS1-3

When the core of a Red Supergiant collapses, a bright event known as a ___________ occurs.

• superdupernova
• supernova
• big bang
• black hole

Tags

NGSS.HS-ESS1-3

Hotter stars appear to be what color? 

• Red
• Blue
• Yellow
• Green

What determines the color of a star? 

• It's size
• It's temperature
• It's composition
• They are all the same color 

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Larger stars (stars with more mass) have a longer life cycle. 

• True
• False

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3