Universe Structure

A ....... is the distance that light travels through space in one year.

• Meter

• Year

• light year

• kilometer

From smallest to the largest

• universe, solar system, galaxy

• galaxy, solar system, universe

• solar system, universe, galaxy

• solar system, galaxy, universe

Space and all the matter and energy in it.

• Space
• Solar System 
• Universe
• Sun

The age of the universe:

• 23 billion years

• 1.4 billion years

• 4 billion years

• 14 billion years

All of the following are in our solar system EXCEPT:

• Asteroids

• Meteoroids

• Comets

• Black Holes

The unknown invisible force or energy which accounts for the biggest percentage of our universe composition is.

• black hole

• dark energy

• ordinary matter

• dark matter

The collection of large and small bodies that orbits the Sun is called __________________.

The universe is mostly

• made of stars

• gas and dust clouds

• rocky planets, moons and extraterrestrial objects such as asteroids

• empty space

What is a planetary system?

• a cluster of planets

• planets that orbit a star (or stars)

• A star (or stars) that orbit a large planet

• A group of extraterrestrial objects (such as asteroids) that orbit a planet

Which of the following is the most massive object in the solar system?

• sun

• Earth

• Mars

• Jupiter