Light Years

A light year is related to ...

• Time

• Energy

• Distance

• Mass

If Star X is 50 times as far from the Sun as Wolf 359 is, how far is Star X from the Sun, to the nearest light year?

• 7.8 ly

• 50 ly

• 359 ly

• 390 ly

A light year is...

• The speed light travels

• How long it takes light to get to you from the sun

• The distance light can travel in a year

• How many years it takes light to be emitted

The light of Proxima Centaury takes 4.3 years to reach Earth.  What does it mean?

• The star is 4.3  miles from Earth

• The star is 4.3 light years from the  Earth

• The star is 43.000.0000.000. light years fromm the  Earth

• The  star is  4.3 km  from the Earth

Tags

NGSS.MS-ESS1-3

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 is.

• True

• False

Tags

NGSS.MS-ESS1-3

A scale diagram of four galaxies is provided. Which galaxy has a diameter closest to 75,000 light years?

• Galaxy JK23

• Galaxy TO37

• Galaxy RB17

• Galaxy WD28

Tags

NGSS.MS-ESS1-3

What is Light Year?

• The distance travelled by light in a second

• The distance travelled by light in a minute

• The distance travelled by light in a year

• The distance travelled by light in a decade

Light Years are a measure of:

• time

• speed

• distance

• light

Tags

NGSS.MS-ESS1-3

light year=

• 1.5 x 10⁸ km

• 9.5 x 10⁸ km

• 1.5 x 10¹² km

• 9.5 x 10¹² km

What is a light year?

• A unit of time

• A unit of distance

• A unit of speed

• A unit of energy