What you'll learn
The Earth's place in the Universe.
Key ideas
- The solar system, galaxies and gravity holding orbits.
- The Big Bang theory and red-shift evidence.
- Plate tectonics driven by mantle convection.
Exam tips
- Explain how red-shift supports the Big Bang.
- Link plate movement to convection currents.
Common mistakes
- Confusing stars, planets and galaxies.
- Forgetting gravity provides the orbital force.