1. Reason 1: helps scientists share and compare their data/ results
Unit 1: Nature of Science. Measurement.
Today most scientists, in almost all countries use the International System of Units (SI units) as their system of measurement.
Reason 1: helps scientists share and compare their data/ results
Reason 2: Another advantage of SI units is all units are based on the number 10; meaning they are easily converted from one unit to another

2. Unit 1: Nature of Science. Measurement.
Length: the distance from one point to another
Basic SI Unit of length: meter
Base unit symbol: m
Tool used to measure length: meter stick

3. Unit 1: Nature of Science. Measurement.
Volume: The amount of space that matter occupies.
VOLUME OF A LIQUID
Basic SI Unit of liquid volume: Liter
Base unit symbol: L
Tool used to measure liquid volume: graduated cylinder

4. Volume of REGULARLY SHAPED SOLID OBJECTS
Unit 1: Nature of Science. Measurement.
Volume of REGULARLY SHAPED SOLID OBJECTS
Basic SI Unit of solid volume: cubic centimeter
Base unit symbol: cm3
Tool used to measure solid volume: meter stick
To calculate solid volume: L x W x H

5. Unit 1: Nature of Science. Measurement.
Mass: is the amount of matter that something is made of
Basic SI Unit of mass: gram
Base unit symbol: g
Tool used to measure mass: triple beam balance

6. Volume of an Irregularly Shaped Object
Unit 1: Nature of Science. Measurement.
Volume of an Irregularly Shaped Object
Basic SI Unit: cubic centimeter
Base unit symbol: cm3
Tool used to measure volume of irreg. solid: graduated cylinder

7. Unit 1: Nature of Science. Measurement.
Water Displacement method:
Volume of liquid after object has been submerged
- Original Volume of liquid in grad. Cylinder
Answer is volume of irregular solid object (mL = cm3)
Dora Example
48 mL
44 mL
4mL = 4cm3

8. Unit 1: Nature of Science. Measurement.
Weight: is a measure of the force of gravity on an object
Basic SI Unit of weight: Newton
Base unit symbol: N
Tool used to measure weight: spring scale

9. Unit 1: Nature of Science. Measurement.
Mass vs. Weight
Mass DOES NOT change with location, weight DOES!
Weight takes into account gravity, mass does not.

10. Unit 1: Nature of Science. Measurement.
Temperature: is a measure of how hot (or cold) something is. Specifically, the measure of average kinetic energy of the particles in the object.
Basic SI Unit of temperature:
Degrees Celsius
Base unit symbol: °C
Tool used to measure temperature: thermometer

11. Unit 1: Nature of Science. Measurement.
Time: the measure of a passing interval, from one event to another
Basic SI Unit of time:
second
Base unit symbol: s
Tool used to measure time: stopwatch