lab safety & scientific method

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
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
5. True or false, eating food or chewing gum is
allowed in the lab.
6. Using one or more of your senses (sight,
touch, sound, taste, and smell) to identify or
learn about something
7. A conclusion formed from available
information or evidence (educated guess)
8. A summary of observations
9. An interpretation of observations
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.
12. Elephants weigh over 5 tons, is an example
of an explanation or description
13. A scientific experiment that involves
changing one factor and observing its effects on
one thing while keeping all other things
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.
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