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Questions and Answers
Which of the following is a characteristic of a physical change?
Which of the following is a characteristic of a physical change?
- Change in state of matter (correct)
- Formation of a new substance
- Release of light or heat
- Change in chemical properties
What is an example of a chemical change?
What is an example of a chemical change?
- Rusting of iron (correct)
- Melting of ice
- Cutting a piece of paper
- Dissolving of salt in water
Which of the following is a common indicator of a chemical change?
Which of the following is a common indicator of a chemical change?
- Change in temperature
- Change in shape or size
- Change in color
- Production of gas or bubbles (correct)
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Study Notes
Physical and Chemical Changes
- A characteristic of a physical change is that it involves a change in state, such as ice melting into water or water boiling into steam, where the substance remains the same but its physical properties change.
Chemical Changes
- An example of a chemical change is rusting of iron, where iron reacts with oxygen to form iron oxide, resulting in a change in the substance's composition.
Indicators of Chemical Change
- A common indicator of a chemical change is the production of heat, light, or gas, such as the burning of gasoline in a car engine, which releases heat and light.
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