Daily lessons coming soon
Beginning Monday 20 April, BBC Bitesize will publish daily online lessons for all ages. We'll also have a new dedicated TV channel full of learning content, podcasts on BBC Sounds and loads of educational video on iPlayer.
Big Bang theory explains how the Universe was formed and why it is still expanding. Space exploration uses a variety of manned spacecraft, space probes and telescopes.
How long ago do scientists think the Universe originated?
4.6 billion years ago
13.8 billion years ago
237 billion years ago
Which of the following is not evidence for the Big Bang?
All other galaxies are moving towards us
The further away a galaxy is, the faster it is moving away
The discovery of cosmic microwave background radiation (CMBR)
What is red-shift?
The time when a star moves from the main sequence to be a red giant
The red filter used by astronomers to analyse the light from distant stars
The increase in wavelength of light from a distant galaxy moving away from Earth
How many galaxies show a red-shift?
Only a few of the most distant galaxies
Nearly all galaxies
What does a larger red-shift indicate?
The galaxy has more stars
The galaxy is moving away faster
The star is about to explode in a supernova
What is the basic idea of the Big Bang theory?
The Universe expanded from a single tiny point to what exists today
The Universe will end in a giant dark energy explosion
The Solar System began when a protostar started nuclear fusion reactions
What feature is believed to be the thinly spread remains of energy released in the Big Bang?
Cosmic microwave background radiation (CMBR)
As the early Universe expanded what atoms formed first?
Which of the following statements is true?
Astronomers have found that the further from us a galaxy is, the more its light is red-shifted
Astronomers have found that the further from us a galaxy is, the less its light is red-shifted
Astronomers have found that the further from us a galaxy is, the more its light is blue-shifted
Which of the following is not a feature of Cosmic Microwave Background Radiation?
The wavelength of this radiation appears to be the same no matter where in space that it comes from
It comes from all directions and from all parts of space
It corresponds to a temperature similar to that of the Sun