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1.Where are the scientists from?
a) India
b) China
c) space
d) the USA
2.In what direction do gravitational waves travel from the centre?
a) down
b) outwards
c) up
d) inwards
3.What things must hit each other in space for the waves to form?
a) space dust
b) gravity
c) two giant space objects
d) planets
4.When did Albert Einstein first talk about the waves?
a) 1916
b) 1910
c) 1961
d) 1932
5.What did Einstein use to predict the waves existed?
a) powerful technology
b) a science book
c) his genius
d) the stars
6.In which US state does Dr Lawrence Krauss work?
a) Alaska
b) Arizona
c) Alabama
d) Arkansas
7.What invention did Dr Krauss say the discovery of the waves was like?
a) the telegram
b) the television
c) the telegraph
d) the telescope
8.What would the discovery of the waves answer?
a) questions about the universe
b) the meaning of life
c) how black holes are formed
d) when the Earth began
9.What things in the universe will the discovery allow us to see?
a) time
b) aliens
c) things we've never seen before
d) black holes
10.How long after Einstein's prediction did scientists discover the waves?
a) 110 years
b) 100 years
c) 105 years
d) 99 years
