1. Physical Science
An Overview

2. Definition Physical Science is the study of matter and energy.
What is matter?
Matter is defined as anything that has mass and volume. In lamens terms matter is the stuff that everything is made of.
All matter has energy

3. Beginning
We are going to start this year by exploring the difference between mass and weight.
Mass: Defined as the amount of matter in an object
Weight: A measure of the gravitational force exerted on a object

4. Mass vs. Weight
To begin to understand this fundamental difference you have to understand the term gravity.
Gravity is a force of attraction between objects that is due to there masses.
Gravitational force is experienced by all objects in the universe all at the same time.

5. Mass vs. Weight
Mass is….
A measure of the amount of matter in an object
Always constant for an object no matter where the object is in the universe
Measured with a balance
Expressed in Kg= Kilograms

6. Mass vs. Weight Weight is…
A measure of the amount of the gravitational force on an object
Varied depending on where the object is in relation to the Earth
Measured with a spring scale
Expressed in N= Newtons

7. Question
If a person is standing in a elevator that is moving downward what will change their mass or weight or both ?????
If a person calculates their mass and weight at the north pole and the equator what numbers will be the same and what numbers will be different.

8. Pretend That You Are in Space!
You are floating around. You drift over to a floating bathroom scale and put your feet on it. Your feet do not push down on the scale at all. The scale shows that you weigh 0. You have lost your weight—but did you lose your mass?

9. Imagine…..