Electromagnets

Kate made an electromagnet with 15 coils that picked up 4 paperclips. She wondered if using a thicker wire would make the electromagnet stronger.

Kate’s Plan:

1. Wrap a thin wire around a nail 15 times and connect to a battery. Count how many paperclips the electromagnet attracts.

2. Wrap a thick wire around a nail 15 times and connect to a battery. Count how many paperclips the electromagnet attracts.

Rust

Dominique designed an experiment to test the following question:

Which liquid will corrode rust from a nail the fastest?

Dominique decided to test apple cider vinegar, hydrochloric acid, and a salt and lemon juice solution to determine which liquid breaks down rust the fastest.

Dominique’s Plan:

1. Pour 300 ml of apple cider vinegar into a glass beaker. Pour 300 ml of hydrochloric acid into a glass beaker. Pour 300 ml of a salt and lemon juice solution in a glass beaker.

2. Use 3 nails with the same amount of rust. Place 1 in each beaker.

3. Start the timer and record how long it takes for the rust to corrode on each nail.