# "Explain" questions — Eduqas GCSE Physics

> 160 questions · physics

## 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

1. [A scientist is studying pressure differences in the ocean. Explain why a sealed plastic bottle, which is partially fille…](https://www.gradenine.co.uk/q/a-scientist-is-studying-pressure-differences-00342f21)
2. [Explain why adding more identical resistors in series to a circuit causes the current in the circuit to decrease, whilst…](https://www.gradenine.co.uk/q/explain-why-adding-more-identical-resistors-00bed27e)
3. [Explain why sound waves are described as longitudinal waves and how they are able to travel through air.](https://www.gradenine.co.uk/q/explain-why-sound-waves-are-described-024a92d5)
4. [Explain what happens to the current in a circuit when the resistance is increased, and use the concept of potential diff…](https://www.gradenine.co.uk/q/explain-what-happens-to-the-current-0341fd60)
5. [A fixed quantity of gas is compressed to a smaller volume at constant temperature. Explain, in terms of particles, why t…](https://www.gradenine.co.uk/q/a-fixed-quantity-of-gas-is-06702052)
6. [A household uses several electrical appliances every day. Explain why the kilowatt-hour is used to measure domestic ener…](https://www.gradenine.co.uk/q/a-household-uses-several-electrical-appliances-07271c77)
7. [A motorcyclist is involved in a collision and slides along the road surface. Explain why wearing a helmet reduces the ri…](https://www.gradenine.co.uk/q/a-motorcyclist-is-involved-in-a-0875e043)
8. [A student uses an electric toaster to make toast. The toaster has a power-rating of 900 W. Explain why the toaster canno…](https://www.gradenine.co.uk/q/a-student-uses-an-electric-toaster-0b9270bd)

## Related

- [Eduqas GCSE Physics revision notes](https://www.gradenine.co.uk/learn/eduqas-gcse-physics)
- [Eduqas GCSE Physics past papers](https://www.gradenine.co.uk/past-papers/eduqas-gcse-physics)
- [Practise with AI marking (free)](https://www.gradenine.co.uk/start)