Upcoming SlideShare
×

# P2.4 Measurement and Safety

315 views

Published on

Published in: Education, Business, Technology
0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
Your message goes here
• Be the first to comment

• Be the first to like this

Views
Total views
315
On SlideShare
0
From Embeds
0
Number of Embeds
19
Actions
Shares
0
2
0
Likes
0
Embeds 0
No embeds

No notes for slide

### P2.4 Measurement and Safety

1. 1. Warmup  How would a standard system of measurements, agreed to and used around the world, make life easier? Give examples.
2. 2. Objectives: 1. Explain the importance of the International System of Units. 2. Determine the appropriate units to use for particular measurements. 3. Identify lab safety symbols, and determine what they mean.
3. 3. Making Measurements  The International System of Units (SI)  current name for the metric system. ○ Used by most scientists and almost all countries.  All SI units are based on the number 10.  Length  SI unit - meter (m).
4. 4.  Mass  Amount of matter that something is made of  SI unit - kilogram (kg)  Volume  Amount of space that something occupies  Liquids - liters (L) or milliliters (mL)  Solids - cubic meters (m3), cubic centimeters (cm3)
5. 5.  Density  Amount of matter in a given volume  SI unit – gram per milliliter (g/mL) or grams per cubic centimeter (g/cm3). ○ Derived quantity!  Temperature  measure of how hot (or cold) something is. ○ Scientists often use degrees Celsius (°C) as the unit. ○ SI base unit - Kelvins (K) d e n s ity m a s s v o lu m e
6. 6.  Area  measure of how much surface an object has  Formula for area of a square or a rectangle:
7. 7. Safety Rules  Always follow your teacher’s instructions.  Read lab procedures carefully and thoroughly.  Pay special attention to safety information and know the safety symbols.