13. Distance of Objects in Space, Relationships and System Model

What unit of distance is most commonly used to measure the vast distances between stars and galaxies?

• Kilometers

• Light-years

• Meters

• Astronomical units

If a star is 4 light-years away from Earth, how long does it take for its light to reach us?

• 4 years

• 4 months

• 4 weeks

• 4 days

Which of the following objects is the closest to Earth?

• The Sun

• The Moon

• Mars

• Venus

Tags

NGSS.MS-ESS1-3

What does the speed of light refer to?

• The time it takes for light to travel in one second

• The distance light travels in one year

• The distance light travels in one minute

• The distance light travels in one second

Tags

NGSS.HS-PS4-1

What is the primary reason it is difficult for humans to travel to distant stars?

• Stars do not have solid surfaces

• The technology to travel at the speed of light does not exist

• Stars are too hot to approach

• Spacecrafts cannot carry enough food for the journey

What is an astronomical unit (AU)?

• The distance from Earth to the Sun

• The distance from Earth to the Moon

• The distance light travels in one year

• The average distance between two stars

Tags

NGSS.MS-ESS1-3

Why can we see the Sun during the day but not other stars?

• The Sun is the only star in our galaxy

• The Sun is much brighter and closer to Earth than other stars

• Other stars are only visible at night

• The Sun is the only star that emits light

What is the estimated number of galaxies in the universe?

• Thousands

• Millions

• Billions

• Trillions

Tags

NGSS.HS-ESS1-2

Approximately how many stars does a galaxy typically contain?

• Thousands

• Millions

• Billions

• Trillions

Why is it difficult to comprehend the vastness of the universe?

• Because the universe is infinite

• Because the universe is expanding

• Because the universe contains billions of galaxies, each with billions of stars

• Because the universe is dark