Practice Key Features Of Chemical Changes (2.2) - Physical and Chemical Changes

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6 sample questions

Question 1.
What is a chemical change?
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Think about changes you observe that can't be reversed.
Question 2.
Name one example of a chemical change.
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Consider changes where something is consumed or transformed.
3Question 3.
Which of the following is a sign of a chemical change?
- Change in color
- Change in shape
- Dissolving
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Consider changes that alter the materials at a molecular level.
4Question 4.
True or False: Chemical changes are usually reversible.
- True
- False
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Think about examples like cooking or burning.
Question 5.
You mix vinegar and baking soda. Describe the chemical changes and what evidence supports them.
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Consider the signs of reactions.
Question 6.
Describe the energy change when wood burns. What products result from this change?
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Focus on what happens before and after burning.

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