Question 18
Materials: Three test tubes, water, iron nail, plastic nail, coated nail.
1. Work in pairs or small groups.
2. Half-fill three test tubes with water.
3. Put a different nail (an iron nail, a plastic nail and a coated nail) into each test tube.
4. Label each test tube.
5. Leave the nails in the water for 1 week.
6. Observe daily and note any changes.
What happened to the iron nail?
1. Work in pairs or small groups.
2. Half-fill three test tubes with water.
3. Put a different nail (an iron nail, a plastic nail and a coated nail) into each test tube.
4. Label each test tube.
5. Leave the nails in the water for 1 week.
6. Observe daily and note any changes.
What happened to the iron nail?
