1. Notes
SPI
Mass and Weight
Science
Learning Intention: Distinguish between mass and weight using appropriate measuring instruments and units.
Purpose: to understand how mass and weight are different from each other.
Success Criteria
I will show that I understand this topic by earning a 90 or
higher on the quiz.
I Can Statement
By the end of this unit I will be able to say...
...I can compare and contrast mass and weight.

2. Mass Notes Key Questions What is it? How is it measured?
SPI
Mass and Weight
Notes
Science
Mass
Key Questions
What is it?
How is it measured?
How can I tell the difference between mass and weight?
Mass: What is it?
Mass is the amount of matter in an object.
In other words it is how much "stuff" is in an object.
Everything that is made of matter has mass.
Anything that is solid, liquid, gas, or plasma has mass.

3. Mass: How is it measured?
We measure mass with a triple-beam balance or an electric balance (there are various kinds)
We are measuring the amount of matter in the object
This measurement does not change from planet to planet
Unit of measure for mass:
Grams
Examples: milligrams (mg), grams (g), kilograms (kg)
Triple-Beam Balance

4. Mass: How Can I Tell the Difference Between Mass & Weight?
SPI
Mass and Weight
Notes
Science
Mass: How Can I Tell the Difference Between Mass & Weight?
Mass does not change from planet to planet (weight does)
Example:
-A full/unopened can of coke on Earth has a mass of 390g.
-same unopened can on Mars would have the same mass (390g)
Earth
Mars
390g
390g

5. Weight Notes Key Questions What is it? How is it measured?
SPI
Mass and Weight
Notes
Science
Weight
Key Questions
What is it?
How is it measured?
How can I tell the difference between mass and weight?
Weight: What is it?
Weight is the measure of gravity’s pull on an object.
Weight = mass of the object times the acceleration of gravity
F.Y.I.-formula for weight is W = M x G
Everything made of matter can be affected by gravity.
(This includes all solids, liquids, gases, & plasma).

6. Weight: How is it measured?
Measure weight by using a scale (there are various kinds)
We are actually measuring the force of gravity's pull
This measurement changes from planet to planet
Unit of measure for weight:
Newtons (not pounds!)

7. Weight: How to Tell the Difference Between Mass & Weight
Weight changes from planet to planet, but mass does not
Example:
A full/unopened can of coke on Earth weighs 3.61 Newtons.
The same unopened can on Mars would weigh 1.20 Newtons
Why? Mar has less gravity than Earth. So there is less force
pulling on the can on Mars than there is on Earth.
Earth
Mars
Earth
Mars
3.61 N
1.20 N

8. Mass vs Weight Song-Video
SPI
Mass and Weight
Notes
Science
Mass vs Weight Song-Video
Task: Write down three things mentioned in the video
Link (3 min 12 sec): "The Mass vs Weight Song" by Mr. Edmonds
Mr. Edmonds: Science Teacher

9. SPI
Mass and Weight
Science
Questions

10. Science Questions Mass does not change from planet to planet.
SPI
Mass and Weight
Mass does not change from planet to planet.
Science
Questions
(Mass is measured in milligrams, grams, kilograms, etc.)

11. Science Questions Measure weight with a scale. Mass and Weight
SPI
Mass and Weight
Science
Questions
Unit of measure for weight is Newtons.
Objects with more mass weigh more than objects with less mass.

12. Science Questions Earth has more mass (is more massive) than Mars.
SPI
Mass and Weight
Science
Questions
Therefore Earth has more gravity than Mars.
Connection: more mass = more gravity, less mass = less gravity
More mass = More gravity
Less mass = Less gravity

13. Science Questions Mass does not change from planet to planet.
SPI
Mass and Weight
Questions
So the answer cannot be section 4 about mass.
Science
Weight does change from planet to planet.
Each planet has a different amount of gravity.
Therefore, objects have different weights from planet to planet.
Sect 2: Weight
Sect 4: Mass