Unlocking the Universe

What does the word 'universe' mean?

• A. Everything around us on Earth and up in space

• B. Everything that we can see at the sky

• C. The Sun, the Moon, and the stars

• D. An old word

Who believed that the Earth was the center of the Universe?

• A. Edwin Hubble

• B. Aristotle

• C. All Greek people

• D. Andromeda

What did Edwin Hubble discover about the Universe?

• A. expanding

• B. shrinking

• C. the Milky Way

• D. Andromeda

What is Hubble's Law?

• A. The speed at which galaxies move away from our Galaxy

• B. The speed at which galaxies move towards our Galaxy

• C. The speed at which galaxies move in a circular motion

• D. The speed at which galaxies move randomly

When did most astronomers believe the Universe began?

• A. 13.8 billion years ago

• B. 2,000 years ago

• C. 18th century

• D. 1924

What is the Big Bang?

• A. The moment when the Universe started to expand

• B. The moment when the Universe started to contract

• C. The moment when the Universe stopped expanding

• D. The moment when the Universe collapsed

How was our Solar System formed?

• A. A cloud of dust collapsed

• B. A star exploded

• C. A ball of dust turned round and round

• D. All of the above

What are the gas planets?

• A. Planets made of rocks

• B. Planets made of ice and gas

• C. Planets made of gas on the outside and liquid inside

• D. Planets made of gas and rocks