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?
 Apron
Goggles
Gloves
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 (educated guess)
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