1. INTRODUCTION OF MATTER
7TH SCIENCE

2. What do you think?
A large iceberg floats in water, but an anchor sinks. What is different about these two objects that causes them to behave differently in water?

3. What is Matter? Definition: discussion Classroom Inventory
All matter is not visible. discussion
Not everything is matter: discussion

4. What is Matter? Matter: is anything that has mass and takes up space.
Examples of matter: water, trees, air, clouds and people.
All matter is not visible: Most gases, such as those that make up air, are invisible.
Not everything is matter: Light or sound- does not take up space or have mass.

5. What is mass?

6. Mass The amount of matter in an object. Measured using a balance
Triple Beam or Double Pan
Units: grams (g)
Objects that are the same size can be made up of different amounts of matter, therefore have different masses.

7. Match everyday items associated with mass:
milligram
gram
kilogram

8. Weight vs. Mass discussion
Mass vs. Weight
Weight vs. Mass
discussion

10. Mass vs. Weight
Weight: measure of the gravitational force of an object.
Gravitational force keeps objects on Earth from floating in space.
The greater that the mass of an object is, the greater the gravitational force on the object will be and the greater the object’s weight will be.
An object’s weight can change with location.
The weight on the moon is 1/6 of its weight on Earth.

11. How are mass and weight measured?
TRIPLE BEAM/DOUBLE PAN BALANCE
SPRING SCALE
Unit: gram (g)
Unit: Newton (N)
Does not change - constant
Changes with location
A 100 – g mass weighs approximately 1 N on Earth.
1 Newton (N) is approximately one-fourth of a pound.

12. AMOUNT OF SPACE THAT AN OBJECT TAKES UP OR OCCUPIES
VOLUME
AMOUNT OF SPACE THAT AN OBJECT TAKES UP OR OCCUPIES

13. Same Volume: Different Mass

14. Calculating Volume: Regular Shaped Object Irregular Shaped Object
Device: metric ruler
Device: Graduated Cylinder
Formula: length x width x height
Formula: final volume – initial volume
Units: centimeters cubed
Units: mL

15. Density

16. Density Formula