Question

Drag each statement to the correct category.
Classify each example as either a physical change or chemical change.
dissolving salt in water
burning wood
digesting food
tearing paper
drying clothes
growing plants
physical change or chemical change

Answer 1

Physical change
- Dissolving salt in water — physical (salt dissolves/dissociates; no new substances formed)
- Tearing paper — physical (paper pieces, same substance)
- Drying clothes — physical (water evaporates; fabrics unchanged)

Chemical change
- Burning wood — chemical (combustion produces new substances like CO2, ash)
- Digesting food — chemical (enzymes break molecules into different substances)
- Growing plants — chemical (biosynthesis/photosynthesis produce new chemical compounds)