Mr. Geter's SCIENCE BLOG!!!
Name:______________________ Section:______ Date:________________________
Physical & Chemical Changes Make-up Quiz
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. The diagram below models a change that occurs in matter.
[pic]
Based on what you know about changes in matter, explain why the diagram shows a physical change rather than a chemical change.
|A. |The particles get smaller. |
|B. |The volume of the matter decreases. |
|C. |The composition of the matter stays the same. |
|D. |The particles change into particles of different substances. |
____ 2. Marco tears a piece of notebook paper into smaller pieces, as shown below.
[pic]
Tearing paper into pieces is an example of what kind of change?
|A. |a change in mass |
|B. |a physical change |
|C. |a chemical change |
|D. |a change in energy |
____ 3. There are several differences between chemical and physical changes. Which process is an example of a chemical change?
|A. |steam rising from a boiling pot of soup |
|B. |a metal railing rusting in damp weather |
|C. |alcohol evaporating from a cotton swab |
|D. |a piece of wood shrinking as it dries out |
____ 4. Trini adds 10 g of baking soda to 100 g of vinegar. The mixture begins to bubble. When the bubbling stops, Trini finds the mass of the resulting mixture. She determines its mass is 105 g. Why has the mass changed?
|A. |A gas has formed and left the mixture. |
|B. |Vinegar evaporated during the experiment. |
|C. |Mixtures always are less massive than their parts. |
|D. |Mass was destroyed when vinegar reacted with baking soda. |
____ 5. Which process is an example of a physical change?
|A. |burning |
|B. |rusting |
|C. |flattening |
|D. |decomposing |
____ 6. Which types of changes observe the law of conservation of mass?
|A. |only changes of state |
|B. |only physical changes |
|C. |only chemical changes |
|D. |physical changes and chemical changes |
____ 7. Chemical changes result in new substances, but physical changes do not. Which process is an example of a chemical change?
|A. |baking a cake |
|B. |chopping a tree |
|C. |heating a cup of tea |
|D. |drying clothes in the dryer |
____ 8. Which process is an example of a physical change?
|A. |Water turns to steam when boiled over a Bunsen burner. |
|B. |Carbon combines with oxygen to form carbon dioxide gas. |
|C. |Water breaks down into hydrogen and oxygen gases over time. |
|D. |Limestone breaks down into lime and carbon dioxide when heated. |
____ 9. Which observation is a sign of a chemical change?
|A. |A rotting potato gives off a bad smell. |
|B. |A melting block of ice leaves a large puddle. |
|C. |A cloud changes shape when blown by wind. |
|D. |A plaster statue breaks when it falls onto the floor. |
____ 10. In the laboratory, Austin is given a mixture of iron filings, sand, and salt. To separate the mixture, Austin uses a magnet, boiling water, and a filter. Which statement is true about the process Austin uses to separate this mixture?
|A. |Austin uses only physical changes to separate the mixture’s components. |
|B. |Austin uses only chemical changes to separate the mixture’s components. |
|C. |Austin uses both physical and chemical changes to separate the mixture’s components. |
|D. |Austin uses neither physical nor chemical changes to separate the mixture’s components. |
Short Answer
1. What are three signs that a chemical change has taken place?
2. How does temperature affect chemical changes?
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