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Questions and Answers
Which of the following is an example of a pure substance?
Which of the following is an example of a pure substance?
- Water (correct)
- Air
- Saltwater
- Concrete
What is the process of a solid changing directly into a gas called?
What is the process of a solid changing directly into a gas called?
- Evaporation
- Sublimation (correct)
- Melting
- Condensation
Which of the following is an example of a chemical change?
Which of the following is an example of a chemical change?
- Mixing salt and water
- Melting ice
- Burning wood (correct)
- Cutting paper
