Which of the following is an example of a physical change? O A. A gas is given off when two substances are mixed.
B. A copper rod is hammered into a thin sheet.
C. A solid forms when two clear liquids are mixed.
O D. A matchstick changes color when it burns.

A gas is given off when two substances are mixed.

physical change: A copper rod is hammered into a thin sheet.

A solid forms when two clear liquids are mixed.

A matchstick changes color when it burns.

explanation

a physicals change vs chemical

physical change is like cutting, changing shape etc, it the molecules that make it and the chemicals of it stay same

chemical change when it chemically changed such as cooking meat

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above