"Explain" questions — WJEC GCSE Physics (Wales)
75 questions · physics · View as Markdown
How to answer
WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.
Sample questions
- A scientist is monitoring a radioactive isotope used in medical imaging. After 6 hours the count rate has fallen from 80…
- A radioactive source emits beta particles. Explain what a beta particle is and describe how beta emission changes the nu…
- A musician plucks a guitar string. The string vibrates and produces a sound wave that travels through the air to a liste…
- Astronomers observe that light from distant galaxies is red-shifted. Explain what red-shift tells us about the universe,…
- Explain how the refraction of seismic waves as they travel through the Earth provides evidence for the internal structur…
- A hospital disposes of radioactive waste from a medical procedure. The waste contains a radioactive isotope with a half-…
- A tumble dryer has a power-rating of 2.5 kW. Explain what is meant by the term power-rating and describe how the amount …
- A nuclear power station uses a radioactive fuel rod. After the fuel rod is removed from the reactor, it must be stored s…