P7 Quiz - Are we alone?

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GCSE Physics (P7) Quiz on P7 Quiz - Are we alone?, created by Leah Firmstone on 23/06/2016.
Leah Firmstone
Quiz by Leah Firmstone, updated more than 1 year ago
Leah Firmstone
Created by Leah Firmstone almost 8 years ago
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Resource summary

Question 1

Question
What is the approximate number of galaxies in the universe?
Answer
  • 100 billion
  • 3 billion
  • 300 billion

Question 2

Question
What is an exo- (or extrasolar? planet?
Answer
  • a planet that orbits a star other than the sun
  • a planet that is further from the Sun than the Earth
  • any planet within our solar system

Question 3

Question
Exoplanets are difficult to detect and all the exoplanets discovered so far have been much bigger than our Earth.
Answer
  • True
  • False

Question 4

Question
What is the 'Goldilocks zone'?
Answer
  • where the distance from the star (eg. the Sun) means that it is neither too hot nor too cold to support liquid water
  • where the distance from the star has the perfect temperature (it's just right) to sustain life
  • the best chance of a solar system being able to sustain life

Question 5

Question
Many scientists believe that, due to the sheer [blank_start]size[blank_end] of the universe and the fact that there are so many [blank_start]galaxies[blank_end], it is highly probable that there will be [blank_start]life[blank_end] on another planet somewhere. Even if a small [blank_start]proportion[blank_end] of stars have extrasolar planets orbiting them, many scientists believe that it is likely that life already [blank_start]exists[blank_end] elsewhere in the universe. However, as yet [blank_start]no[blank_end] evidence for [blank_start]extraterrestrial[blank_end] life - either at present or in the past - has been detected.
Answer
  • size
  • galaxies
  • life
  • proportion
  • exists
  • no
  • extraterrestrial

Question 6

Question
Voyager 1 is one of two probes launched in 1977 by NASA to study the outer solar system. It has travelled 17 billion km carrying 'The Golden Records'.
Answer
  • True
  • False
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