ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6) Question 3
ASMO Science · ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6)
The diagram above shows that the light bulbs lighted up when the circuits were connected by immersing the iron rods into sea water and distilled water respectively. What is there difference in the brightness of light bulbs by using both solutions to complete the circuit?
Sea water is an electrolyte.
Sea water contains ions that conduct electricity better.
Distilled water has a higher electrical resistance.
Water molecules conduct electricity easier in sea water.