1. Mass, Density, and the Classification of Matter

2. Mass: the amount of matter that is in an object
Volume: how much space an object takes up

3. How to calculate Volume
Volume= length x height x width

4. volume = 72cm₃ volume = length x width x height
volume = 6cm x 3cm x 4cm
volume = 72cm₃

5. Graduated Cylinder
Used to measure volume

6. Meniscus: the bottom of the curve; place of measurement

8. Volume of object?

9. Question
Does volume depend on mass?

10. The ratio of mass and volume
density = mass/volume

11. An object has a mass of 36 grams and takes up 12 mL
An object has a mass of 36 grams and takes up 12 mL. What is its density?

12. Gravity A force that acts on matter The greater the matter, the
greater the force

14. The earth’s mass is so
great, that we can observe
its force of gravity on us.

15. gravity

16. Buoyant Force
the upward “push” which water (or any liquid) gives to an object

19. Surface Area When surface area is greater, more water is displaced.
This causes a greater upward buoyant force

20. Atom
a tiny particle and the basic building block of all matter

21. Element
Made of only one type of atom
Examples:
Gold, copper, oxygen

22. Molecules
Particles formed when two or more atoms are chemically glued together
A molecule can be the same type of atom or different atoms
Examples: water molecule and oxygen molecule

23. Compound A type of molecule with two or more elements
Water is a compound; oxygen is not

24. Mixture
Any number of different atoms and molecules arranged in any order
2 ways to separate a mixture
1. physical process
2. Chemical process

25. Physical Process
Techniques that can separate the different parts of a mixture
No chemical reactions

26. Chemical Process
Chemical reactions that can be used to separate a compound into its different parts.

27. atom video
3D atom