A group of students collected the following objects to compare one physical property of metals and non-metals:
- Iron nail
- Copper coin
- Aluminium spoon
- Wooden stick
- Coal piece
Each object was gently struck with another hard object. They carefully listened to the sound produced and compared their observations.
Answer the following questions based on the activity:
1. Which conclusion is best supported by this activity? - .
2. If all the metal objects in the activity were painted with thick paint, which property tested in the activity would remain unchanged? - .