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

2. The white ring on a glass graduated cylinder is to

prevent it from breaking when it falls

3. In the lab, what will protect you from acid that spills out of a beaker?

ApronGogglesGloves

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

5. True or false, eating food or chewing gum is allowed in the lab.

False!

6. Using one or more of your senses (sight, touch, sound, taste, and smell) to identify or

learn about something

observation

7. A conclusion formed from available information or evidence

inference

8. A summary of observations

description

9. An interpretation of observations

explanation

10. A zebra has black and white stripes. This is an example of

An observation

11. Logan didn’t finish eating his lunch, he might be sick.

inference

12. Elephants weigh over 5 tons, is an example of an explanation or description

description

13. A scientific experiment that involves changing one factor and observing its effects on

one thing while keeping all other things constant.

Controlled experiment

14. The variable that is changed (manipulated) in an experiment

Independent variable

15. The variable changes (responds) as a result of a change in the independent variable

Dependent variable

17. An explanation that can be tested with a scientific investigation.

hypothesis

16. A series of steps that scientists use when performing an experiment.

Scientific method

18. If the amount of water increases, then the height of the plant will increase. This is an

example of

A hypothesis

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

20. Physical Science is the study of

Matter and energy