Light Years

A light year is the _ _ _ _ _ _ _ _ travelled by _ _ _ _ _ in one Earth _ _ _ _.

Why do we use light years?

• Scientists are lazy.

• To make large numbers more manageable.

• So we can time travel.

• So we can make objects that are far away closer.

A light year is a measurement of

• time

• distance

• speed

• velocity

Which of the following is NOT an example of when you would use light years as a measurement?

• Distance between galaxies

• Distance from sun to nearest star

• Distance from sun to earth

• Distance between stars

Approximately how long is one light year?

• 5.88 trillion miles

• 1 million miles

• 93 million miles

• 1 billion kilometers

Scientist use light years to measure objects in space rather than units such as miles or kilometers because of how massive the galaxy and universe are.

• True

• False

What is the reason for using light years and astronomical units (149.6 million kilometers) in astronomy?

• They are traditional units used by ancient astronomers.

• Distances in space are extremely large, making traditional units impractical.

• These units are easier to convert to miles and kilometers.

• They are used to measure the speed of light.

Tags

NGSS.MS-ESS1-3

Imagine you're an interstellar traveler like Sophia, zooming through the cosmos! Why do scientists, like our friend Kai, prefer using light years instead of miles or kilometers to measure the vast distances in space?

• True

• False

Why do we use light years and astronomical units (149.6 million kilometers) to measure distances in space?

• Scientists want to sound smart.

• Hubble discovered these units and wanted to use them.

• Space is too small to use km, it wouldn't make sense.

• Space is too big, vast, enormous to use traditional units, like miles.

Tags

NGSS.MS-ESS1-3

Hey space explorers! Why do we use light years and astronomical units (149.6 million kilometers) to measure distances in the vast universe? Join Mason, Aria, and Noah on this cosmic quest!

• Scientists want to sound smart.

• Hubble discovered these units and wanted to use them.

• Space is too small to use km, it wouldn't make sense.

• Space is too big, vast, enormous to use traditional units, like miles.