Scale of the Universe

Is a galaxy bigger than a nebula?

• Yes

• No

What is a light year? Choose ALL answers that are correct. YOU SHOULD CLICK MORE THAN ONE CORRECT ANSWER!

• A very long amount of time

• A very long distance

• The amount of time light travels in a year.

• The distance light travels in a year.

Why do other stars appear so much smaller than the sun?

• They are much smaller

• They are so far away

• They are not as bright

• They are dwarf stars

Astronomers use _______ to measure distances up to a few hundred light years from Earth.

• telescopes

• parallax

• light years

• spectrograph

Astronomers define the __________ as all of space and everything in it. The _________ is enormous, almost beyond imagination.

• solar system

• galaxy

• universe

• all of the above

This uses powers of ten to write very large or very small numbers in shorter form. Astronomers frequently use this to describe sizes and distances in the universe.

• point-slope form

• y=mx+b

• standard form

• scientific notation

This is a unit astronomers use to measure distances between stars.

• light-years

• kilometers

• miles

• space miles

Which of these objects is the biggest?

• Mercury

• the Sun

• the Solar System

• the Milky Way

Tags

NGSS.MS-ESS1-3

A light year is

• the time it takes light to travel

• the distance light travels in one year

• the distance between stars

• the age of the Milky Way

What is the largest structure in the universe?

• Galaxy

• Solar System

• Nebula

• Supercluster