Static electricity, a power source and the electric circuit
Answers are for parents and teachers.
1
Thunder was heard 4 s after lightning. How many metres away was it? (340 m/s)
1360
2
4 fruit cells are joined in series, each 9 tenths of a volt. How many tenths in total?
36
3
Sort 5 household items (spoon, glass, rubber, paper, key) into a conductor/insulator table. Use only a battery for testing.
Spoon and key (metal) – conductors; glass, rubber, dry paper – insulators.
4
Why is it unwise to stand under a tall tree or in the open during a thunderstorm?
Lightning can strike tall objects and people in the open; indoors is safer.