physical or chemical changes

Question

1. dumping clothes into a laundry basket
2. bubbles and foam
3.removing extra dirt to make shirts white
4. breaking the dirt into little pieces to wash it away
5. heat causing water to evaporate
6. sewing something back on
7. folding clothes

Answer 1

Let's categorize each of the listed actions into physical or chemical changes:

1. Dumping clothes into a laundry basket - Physical change (The clothes' state does not change, only their location.)
2. Bubbles and foam - Chemical change (Often indicates a chemical reaction, particularly in cleaning or cooking.)
3. Removing extra dirt to make shirts white - Physical change (This involves cleaning, but the act of making shirts white could involve a chemical process if bleach is used.)
4. Breaking the dirt into little pieces to wash it away - Physical change (This changes the physical state of the dirt but does not change its chemical composition.)
5. Heat causing water to evaporate - Physical change (This is a change in state from liquid to gas.)
6. Sewing something back on - Physical change (This changes the position of the fabric but does not change the substance.)
7. Folding clothes - Physical change (This changes the arrangement of the clothes but not their chemical structure.)

In summary, most of these actions are physical changes, with exceptions that might involve chemical changes depending on the context (like the presence of detergents).