Living Environment Translated Arabic 2014 | Page 10

6. Scientists use the SI ( Metric) system of measurement.
Measurement

Equal to

1 millimeter
1 centimeter
1 meter
1 kilometer

mm
cm
m
km

0.001m
0.01m
100cm
1000m

Volume

1 milliliter
1 liter

mL
L

0.001L
1000mL

Mass

E.

Symbol

Length

A.
B.
C.
D.

Unit

1 milligram
1 gram
1 kilogram

mg
g
kg

0.001g
1000mg
1000g

7. Lab Safety Rules:
a. Never eat or drink ANYTHING in the lab unless your teacher tells
you to do so.
b. Never mix chemicals unless you have the permission of the
teacher
c. Always clean up after yourself
d. Listen carefully to all of the directions given by the teacher and
the procedures.
Do not follow a procedure that you do not understand… Ask Questions!
Always wear your goggles when you are told to do so.
Never use broken equipment… tell you teacher.
Know where the fire extinguisher and eyewash are located and how to
use them
IF YOU HAVE AN ACCIDENT TELL THE TEACHER IMMEDIATELY!!!