S1: Freezing of water to form ice involves a change in state but no new substances are formed.
S2: The reaction of vinegar and baking soda releases carbon dioxide, a gas that causes the bubbling and fizzing observed.
S3: The process of photosynthesis in plants, converting carbon dioxide and water into glucose and oxygen using sunlight, is an essential chemical change for life on Earth.
S4: The decomposition of biodegradable waste into compost is a physical change because it does not involve new substances.
1
S1, S2, and S3 are true; S4 is false
2
S1, S3, and S4 are true; S2 is false
3
S2, S3, and S4 are true; S1 is false
4
All statements are true