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PiXL GetIT!
GCSE Physics
Topic – Space Physics   
© Copyright The PiXL Club Ltd, 2017
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2. GetIT – Space Physics
Our solar system contains: The Sun (star); eight planets and their natural satellites, dwarf planets, asteroids and comets.
Our solar system is part of the Milky Way galaxy.
The order of planets from the Sun is:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
Comets are made of ice and dust and have an elliptical orbit.
Asteroids are made of rock and metal and orbit the Sun in belts.

3. Match IT Red shift Big Bang theory Steady State theory CMB radiation
Matter is continuously created as the universe expands so the density stays the same.
Big Bang theory
Cloud of gas and dust. Stars are made in these.
Steady State theory
Ball of ice and dust. Orbit is elliptical.
CMB radiation
A tiny point enlarged rapidly in a hot explosion and is still expanding today.
Nebula
A star where all the hydrogen has been used up.
Red Giant
Made of rock and metal, found in belts.
Elliptical
Increase in wavelength of light from distant galaxies
Asteroid
Cosmic microwave background radiation received from all parts of the galaxy.
Comet
Oval shaped

4. Match IT - Answers Red shift Big Bang theory Steady State theory
Increase in wavelength of light from distant galaxies
Big Bang theory
A tiny point enlarged rapidly in a hot explosion and is still expanding today.
Steady State theory
Matter is continuously created as the universe expands so the density stays the same.
CMB radiation
Cosmic microwave background radiation received from all parts of the galaxy.
Nebula
Cloud of gas and dust. Stars are made in these.
Red Giant
A star where all the hydrogen has been used up.
Elliptical
Oval shaped
Asteroid
Made of rock and metal, found in belts.
Comet
Ball of ice and dust. Orbit is elliptical.

5. Label IT

6. Label IT - Answers
Nebula
Protostar
Red giant
White dwarf
Black dwarf
Main sequence star
Red super giant
Supernova
Black hole
Neutron star

7. Match IT and Label IT

8. Match IT and Label IT - Answers
Elliptical orbit
Comet
Star
Planet
Natural satellite

9. Match IT and Label IT - Answers
Elliptical
Oval shaped
Comet
Ball of ice and dust. Orbit is elliptical.
Natural Satellite
Moon. Orbits a planet.
Planet
Orbits a star. Larger than an asteroid or comet.
Star
Its gravity keeps the planets, comets and asteroids in orbit