identify if the following changes are physical or chemical

Question

1. cutting an apple
2. water changes to steam
3. sugar dissolves in water
4. cooking pancakes
5. inflating a tire
6. melting ice
7. combining baking soda and vinegar
8. silver tarnishing
9. alcohol evaporationg
10. milk sours
11. food is digested
12. crumpling a piece of paper
13. an iron axe rusts
14. snow freezes to ice
15. paper towel absorbs water

Answer 1

Here’s the identification of each change as either physical or chemical:

1. Cutting an apple - Physical change (the apple remains an apple)
2. Water changes to steam - Physical change (state change from liquid to gas)
3. Sugar dissolves in water - Physical change (the sugar can be recovered)
4. Cooking pancakes - Chemical change (new substances are formed)
5. Inflating a tire - Physical change (no new substances are formed)
6. Melting ice - Physical change (state change from solid to liquid)
7. Combining baking soda and vinegar - Chemical change (reaction produces new substances)
8. Silver tarnishing - Chemical change (a new compound forms)
9. Alcohol evaporating - Physical change (state change from liquid to gas)
10. Milk sours - Chemical change (bacteria produce new substances)
11. Food is digested - Chemical change (the food is broken down into new substances)
12. Crumpling a piece of paper - Physical change (the paper remains paper)
13. An iron axe rusts - Chemical change (formation of rust, a new substance)
14. Snow freezes to ice - Physical change (state change from solid to solid)
15. Paper towel absorbs water - Physical change (no new substances are formed)

In summary, physical changes involve alterations in appearance or state without changing the substance's identity, while chemical changes result in the formation of new substances.