Structure of the Universe

What type of galaxy is this?

• Ring

• Irregular

• Spiral

• Elliptical 

Answer explanation

The galaxy in question is classified as a Spiral galaxy due to its distinct spiral arms and a central bulge. This structure is characteristic of spiral galaxies, setting them apart from ring, irregular, and elliptical types.

Tags

NGSS.MS-ESS1-2

What type of galaxy do we live in?

• Spiral

• Elliptical

• Irregular

• Coaxial

Answer explanation

We live in a spiral galaxy known as the Milky Way. Spiral galaxies are characterized by their flat, rotating disks containing stars, gas, and dust, along with central bulges and spiral arms.

Tags

NGSS.MS-ESS1-2

A Group of stars, and or star systems, star clusters, dust and gas held together by gravity is known as:

• Universe

• Galaxy

• Solar System

• Planet

Answer explanation

A galaxy is a massive system of stars, star clusters, gas, and dust bound together by gravity. The other options refer to smaller systems or entities, making 'galaxy' the correct choice.

Tags

NGSS.MS-ESS1-2

What Galaxy is Earth located?

• Andromeda

• Milky Way

• Sagittarius

• Snickers

Answer explanation

Earth is located in the Milky Way galaxy, which is the galaxy that contains our solar system. The other options, Andromeda and Sagittarius, are different galaxies, while Snickers is not a galaxy at all.

What unit is used to measure distances in space?

• Light year

• Kilometer

• Miles

• Solar unit

Answer explanation

A light year is the distance that light travels in one year, making it a standard unit for measuring vast distances in space. While kilometers and miles are used on Earth, light years are more practical for astronomical distances.

A theory that says the universe began as a small point that expanded rapidly about 13.7 billion years ago.

• Big Bang Theory

• Singularity Theory

• Galaxy Theory

Answer explanation

The Big Bang Theory describes the universe's origin from a singular point that expanded rapidly around 13.7 billion years ago, making it the correct choice over Singularity Theory and Galaxy Theory.

Tags

NGSS.HS-ESS1-2

How many stars are in our solar system?

• too many to count

• billions

• one

• only the stars that we can see

Answer explanation

Our solar system contains only one star, which is the Sun. The other options suggest multiple stars, but in reality, the Sun is the sole star that provides light and heat to our solar system.

Why does the sun feel so hot and look like the brightest star in our sky?

• It is yellow.

• It is the biggest star.

• We can see it in the daytime.

• It is the closest star to earth.

Answer explanation

The sun feels hot and appears bright because it is the closest star to Earth. Its proximity allows us to receive more heat and light compared to other stars, making it the most prominent in our sky.

Ava is looking up at the night sky and wonders what we call all of space and everything in it.

• planet

• solar system

• galaxy

• universe

Answer explanation

The term 'universe' encompasses all of space and everything within it, including galaxies, solar systems, and planets. Therefore, 'universe' is the correct answer as it represents the totality of existence.

The sun and all of the planets and other bodies that travel around it. 

• Universe 

• Galaxy 

• Star

• Solar System 

Answer explanation

The sun and all the planets, along with other celestial bodies that orbit it, collectively form the Solar System. This term specifically refers to our local system, distinguishing it from the broader concepts of the universe or galaxy.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2