According to scientists how old is the Universe?

• 13 million years old

• 13 billion years old

• 14 million years old

• 14 billion years old

The universe is enourmous, and contains billions of...

• Asteroids and comets

• Planets and satellites

• Galaxies and stars

• All previous answers are correct

After the Big Bang the universe began to...

• Expand

• Shrink

The universe is still expanding

• True

• False

Which definition is correct?

• A star is a small ball of gas that gives out light and heat. Stars can be different sizes, colours and temperatures.

• A star is a huge ball of gas that gives out light and heat. Stars can be different sizes, colours and temperatures.

• A star is a small ball of gas that gives out light and cold. Stars can be different sizes, colours and temperatures.

• A star is a huge ball of gas that gives out light and cold. Stars have the same size, colour and temperature.

Which adjective describes best our galaxy?

• Cluster

• Tilted

• Spiral-shaped

• Heat

Which is the correct order of the Solar system's planets?

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune and Uranus

• Mercury, Venus, Earth, Mars, Jupiter, Uranus, Saturn and Neptune

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune

• Mercury, Venus, Earth, Jupiter, Mars, Saturn, Uranus and Neptune

Which definition is correct?

• Planets and satellites are celestial bodies that do not produce their own light.

• Planets and satellites are celestial bodies that produce their own light.

• Planets and galaxies are celestial bodies that do not produce their own light.

• Stars and satellites are celestial bodies that do not produce their own light.

Which of the following sentences is correct

• The rotation movement lasts 24 hours

• The rotation movement lasts 365 days

• The translation movement lasts 24 hours

Which of the following sentences is correct about the rotation movement

• It's done on its axis

• Because of it we have day and night

• It is done counter clockwise

• All previous answers are correct