Science, explained simply
Straight, exam-ready answers to the questions students actually ask.
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Physics
Chemistry
- Why does graphite conduct electricity?
- Why is diamond so hard?
- Why do ionic compounds conduct electricity when molten but not when solid?
- Why do ionic compounds have high melting points?
- Why do metals conduct electricity?
- Why does increasing temperature increase the rate of reaction?
- Why does a catalyst speed up a reaction?
- How does fractional distillation of crude oil work?