Question

1.
Which of the following is a physical change? (2 points)

A newspaper burns when placed in a fire.

An iron chair rusts when left outside.

A sample of water boils and releases gas.

A plant changes carbon dioxide and water into sugar.

Answer 1

Answer:

A sample of water boils and releases gas.

Explanation:

Physical change is a change where no any chemical reaction takes place only the chemical composition of matter changes. It is a reversible process .

Burning of newspaper, rusting of iron, plant changes carbon dioxide and water into sugar (photosynthesis) are  chemical reaction and irreversible process.

Answer 2

Answer:  A sample of water boils and releases gas.

Explanation: When water boils it evaportates but it is still water so this is a psysical change

Hope this helps !