Whats in the Universe?

Gap Filling Quiz

Fill in all the gaps by dragging the words in the top bar to their correct places.
Correct answers will appear in green and incorrect answers will appear in red.
lncorrect answers may be corrected by dragging the correct word to its place in the paragraph.
   burn      energy      escape      galaxies      gravity      helium      ice      light      meteors      Milky      night      orbits      stars   
The Universe contains galaxies, stars, black holes, planets, comets and .
A star is a huge ball of gas, mostly hydrogen and .
Nuclear fusion reactions inside the star release enormous amounts of .
Stars are very hot and give off their own .
This is why we can see the Sun during the day, and distant stars in the sky.
A galaxy is a large group of many millions of .
Our Sun is just one of at least 200 billion stars in our galaxy, the Way.
The observable universe contains around 80 billion .
A black hole cannot be seen because light is unable to from it.
A black hole forms when a large star collapses in on itself because of .
A planet is a large rocky or gaseous object that a star.
Their are almost circular.
Comets are balls of and dust.
Meteors are small rocks. They usually up when they enter a planet’s atmosphere, forming a ‘shooting star’.