1. Chapter 1: Matter

2. 1.1 Matter has mass and volume

4. Metric system base units
Property
Name
Symbol
Length
Meter m
Volume
Liter L
Mass
Gram, kilogram
g, kg
Temperature
Kelvin K

5. Matter is anything has mass and takes up space.
What is Matter???
Matter is anything has mass and takes up space.
Matter is made of atoms.
Example: human, desk, pencil, book, air, water
Nonexample: sound, light

6. What is Mass???
Mass is the amount of matter in an object; how much “stuff” is the object made of

7. What is Mass???
Mass is the amount of matter in an object; how much “stuff” is the object made of
Example: Which has more mass a metal teaspoon or a plastic teaspoon? METAL TEASPOON

8. How do we measure Mass???
Mass is measured in a unit called kilograms (kg). Smaller amounts of mass are measured in grams (g).
Use a triple beam balance to measure the amount of matter an object has.

9. How to read a triple beam balance

10. How to read a triple beam balance
Make sure all sliders start at zero.
Place object in pan.
Starting with the largest slider (back), slide each until the beam is balanced.
Add up the totals of the sliders to get the mass.
**Remember to watch how you line up your numbers before you add!!!

11. Example 1
What is the measurement?
= grams

12. Example 2
What is the measurement?
= grams

13. Example 3
What is the measurement?
= 62.4 grams

14. Weight is the downward pull on an objects mass due to gravity
What is weight?
Weight is the downward pull on an objects mass due to gravity
Measured in Newtons (N)
Use a spring scale to measure the weight

15. What is weight?

16. Mass and weight are not the same!!!
Weight = mass X gravity
Mass cannot change! (how much matter inside object)
Weight can change! (pull of gravity on mass of object)

17. What is the weight of a 15 kg box?
Weight = mass X gravity
gravity on Earth = 9.8
Weight = (15 kg) x (9.8)
Weight = 147N
15 kg

18. What is the weight of a 15 kg on the Moon?
Weight = mass X gravity
gravity on Moon = 1.6
Weight = (15 kg) x (1.6)
Weight = 24N
15 kg

19. What is Volume???
Volume is the amount of space an object takes up
All objects take up space, so all objects have volume
The way to measure the volume depends on the shape of that object

20. How to measure Volume???
For a liquid, use a graduated cylinder.
The units will be milliliter (mL)

21. How to read a graduated cylinder
Graduated cylinder must be on flat surface
Keep eyes at the level of the liquid
Read the meniscus – curve at the bottom of the measured line of the liquid

22. What is this measurement?
53 mL
Example 1

23. What is this measurement?
Example 2
What is this measurement?
36 mL

24. How to read a graduated cylinder

25. How to measure Volume???
For a “true” solid, use the equation:
Volume = length x width x height
Units will me cubic centimeter (cm3)

26. What is this measurement? V = l x w x h V = 5cm x 8cm x 2cm V = 80 cm3
Example 1
What is this measurement?
V = l x w x h
V = 5cm x 8cm x 2cm
V = 80 cm3

27. What is this measurement? V = l x w x h V = 6cm x 4cm x 7cm
Example 2
What is this measurement?
V = l x w x h
V = 6cm x 4cm x 7cm
V = 168 cm3

28. What is this measurement? V = l x w x h V = 12cm x 4cm x 3cm
Example 3
What is this measurement?
V = l x w x h
V = 12cm x 4cm x 3cm
V = 144 cm3

29. How to measure Volume???
For an “irregular” solid, use displacement
Displacement – the difference in the measure of a graduated cylinder; how far the liquid rises
Units will me milliliter (mL)

30. What is this measurement? New measurement – original
Example 1
What is this measurement?
New measurement – original
60.5 mL – 50.0 mL = 10.5mL

31. What is this measurement? 22.80 mL – 16.45 mL = 6.3 mL
Example 2
What is this measurement?
22.80 mL – mL = 6.3 mL

32. What is this measurement? 100 mL – 80 mL 20 mL
Example 2
What is this measurement?
100 mL
– 80 mL
20 mL

33. 1.2 matter is made of atoms

34. Atoms are the smallest, basic unit on matter.
What is an atom?
Atoms are the smallest, basic unit on matter.
They are the building blocks that create matter.
Atoms are so small they cannot be seen with a microscope

35. What is a molecule?
When 2 or more atoms bond together they form a molecule.
Molecules can be made of two of the same kind of atoms or two different kinds of atoms

36. Example: water molecule (2 hydrogen atoms, 1 oxygen atom)
What is a molecule?
Example: water molecule (2 hydrogen atoms, 1 oxygen atom)

37. Example: oxygen molecule (2 oxygen atoms )
What is a molecule?
Example: oxygen molecule (2 oxygen atoms )

38. What is a molecule?
A molecule is the smallest amount of a substance
If you break a molecule down you end up with an atom.
Molecules can be made of different numbers of atoms
Molecules made of the same type of atom but a different number create a different substance.

39. Atoms and Molecule movement
Atoms and molecules are always in motion.
In liquid objects the motion is easy to observe
In solid objects the motion is not noticeable
Example: How does food coloring spread in a class of water? Motion of the water molecules.

40. Atoms and Molecule movement
Example: How does food coloring spread in a class of water? Motion of the water molecules.
Atoms and Molecule movement