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1. While working on a class chemistry experiment, Rachel dropped a glass
test tube filled with an unknown liquid. What should Rachel do first?
Inform the teacher
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2. The white ring on a glass graduated cylinder is to
prevent it from breaking when it falls
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3. In the lab, what will protect you from acid that spills out of a beaker?
ApronGogglesGloves
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4. The best way to smell ammonia in a test tube is to take your hand and wave it over the test tube to lift the ammonia vapors towards your nose.
This is called
wafting
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5. True or false, eating food or chewing gum is allowed in the lab.
False!
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6. Using one or more of your senses (sight, touch, sound, taste, and smell) to identify or
learn about something
observation
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7. A conclusion formed from available information or evidence
inference
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8. A summary of observations
description
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9. An interpretation of observations
explanation
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10. A zebra has black and white stripes. This is an example of
An observation
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11. Logan didn’t finish eating his lunch, he might be sick.
inference
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12. Elephants weigh over 5 tons, is an example of an explanation or description
description
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13. A scientific experiment that involves changing one factor and observing its effects on
one thing while keeping all other things constant.
Controlled experiment
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14. The variable that is changed (manipulated) in an experiment
Independent variable
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15. The variable changes (responds) as a result of a change in the independent variable
Dependent variable
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17. An explanation that can be tested with a scientific investigation.
hypothesis
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16. A series of steps that scientists use when performing an experiment.
Scientific method
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18. If the amount of water increases, then the height of the plant will increase. This is an
example of
A hypothesis
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19. Rene wanted to determine the effects of a soil pollutant on the growth of a sunflower
plant. According to this information, what is the independent (manipulated) variable?
Soil pollutant
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20. Physical Science is the study of
Matter and energy