1. Science Notes ~
Metrics

2. International System of Units (SI):
standard system of measurements based on multiples of ten

3. Why do we use a system of measurements?
In science we need to have accurate and precise communication
A measurement of “1” means nothing UNLESS it has units.

4. A Measurement Has Three Parts
The numerical value which tells how much
The unit, which tells us what the measurements are in
The type of measurement
25 cm
VALUE
MEASURING LENGTH
UNIT

5. 1. Liquid Volume: the amount of space a liquid takes up
Unit of measurement
is liter (L)
- Scientific tool use to measure liquid volume is a graduated cylinder
- Example: 1 L = the volume of a medium water bottle

6. Read at the meniscus, lowest point of the liquid

7. Finding the Volume of a Solid…
A. Regular Shaped Objects (cube)
Volume = L X W x H
Volume = cm x cm x cm
Volume = cm3 H E I G
LENGTH T
WIDTH

8. Example: Volume = L x W x H. Volume =3. 80 cm x 2. 60 cm x 3. 80 cm
Example: Volume = L x W x H Volume =3.80 cm x 2.60 cm x 3.80 cm Volume = cm3

9. B. Volume - Irregular Shaped Object…
Fill a graduated cylinder to a certain level with water.
Next, put the object in see how much the water rises up.
Then subtract the
original level from the
second water level to
find the volume.
1 mL = 1 cm3

10. 2. Length: the distance between two points
Standard (base) unit of measure is meter (m)
Large distances measured in kilometers (km)

11. Smaller distances are measured in centimeters (cm) or millimeters (mm)
Use metric ruler or meter stick to measure length
Example: 1m = distance from the floor to the doorknob

12. 3. Mass: the amount of matter in an object
Matter is “anything that takes up space”
Unit of measurement is gram (g)
Large measurements are measured in kilograms (kg)

13. Scientific tool used to measure mass is a balance
1000 grams = 1 kg
Scientific tool used to measure mass is a balance

14. MASS VS WEIGHT is the same wherever you are
Is defined as the force of gravity on the object
Measured with spring scale
Changes from planet to planet

15. PAN BEAMS
Zero RIDERS POINTER
Adjustment
Knob

16. 4. Temperature
A measure of the average energy of motion of the particles of a substance
The more the particles move the higher the temperature
The less the particles move the colder the temperature
Unit of measurement is degrees Celsius ºC
Water freezes at 0ºC and boils at 100 ºC