Across
- 2. i have no idea
- 6. a track on which cars race
- 7. electrons and "....."
- 8. the directional and planned flow of rivers
Down
- 1. invented by Simon ohm
- 2. fossilised tree sap
- 3. protons and "......"
- 4. the measurement of power that a batter produces
- 5. contain protons and electrons