Question

write p for physical change or c for chemical change.
3.017)____a banana rots.
3.018)____water condenses into clouds.
3.019)____a bike rusts.
3.020)____a piece of paper is crumpled.

Explanation:

• A banana rots: Rotting is a chemical change as new substances are formed due to microbial action and chemical reactions.
• Water condenses into clouds: Condensation is a physical change as it involves a change in the state of water (from gas to liquid) without forming new substances.
• A bike rusts: Rusting is a chemical change as iron reacts with oxygen and moisture to form iron oxide (rust), a new substance.
• A piece of paper is crumpled: Crumpling is a physical change as it only changes the shape of the paper without altering its chemical composition.

Answer:

3.017) C
3.018) P
3.019) C
3.020) P