11 Matter has mass and volume Metric system base units Property Name Symbol Length Meter m Volume Liter L Mass Gram kilogram g kg Temperature Kelvin K What is Matter Matter is anything has mass and takes up space ID: 602959
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Slide1
Chapter 1: MatterSlide2
1.1 Matter has mass and volumeSlide3Slide4
Metric system base units
Property
Name
Symbol
Length
Meter
m
Volume
Liter
L
Mass
Gram, kilogram
g, kg
Temperature
Kelvin
KSlide5
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, lightSlide6
What is Mass???
Mass is the amount of
matter
in an object; how much
“stuff”
is the object made ofSlide7
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 TEASPOONSlide8
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.Slide9
How to read a triple beam balanceSlide10
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!!!Slide11
Example 1
What is the measurement?
200 + 70 + 2.1 = 272.1 gramsSlide12
Example 2
What is the measurement?
100 + 30 + 5.7 = 135.7 gramsSlide13
Example 3
What is the measurement?
0
+ 60 + 2.4 = 62.4 gramsSlide14
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 weightSlide15
What is weight?Slide16
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)Slide17
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 kgSlide18
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 kgSlide19
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 objectSlide20
How to measure Volume???
For a liquid, use a
graduated cylinder
.
The units will be
milliliter (mL)Slide21
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 liquidSlide22
Example 1
What is this measurement?
53 mLSlide23
Example 2
What is this measurement?
36 mLSlide24
How to read a graduated cylinderSlide25
How to measure Volume???
For a “true” solid, use the equation:
Volume = length x width x height
Units will me
cubic centimeter (
cm
3
)Slide26
Example 1
What is this measurement?
V = l x w x h
V = 5cm x 8cm x 2cm
V = 80
cm
3Slide27
Example 2
What is this measurement?
V = l x w x h
V = 6cm x 4cm x 7cm
V = 168
cm
3Slide28
Example 3
What is this measurement?
V = l x w x h
V = 12cm x 4cm x 3cm
V = 144
cm
3Slide29
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)Slide30
Example 1
What is this measurement?
New measurement – original
60.5 mL – 50.0 mL = 10.5mLSlide31
Example
2
What is this measurement?
22.80 mL – 16.45 mL = 6.3 mLSlide32
Example
2
What is this measurement?
100 mL
–
80 mL
20 mLSlide33
1.2 matter is made of atomsSlide34
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 microscopeSlide35
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 atomsSlide36
What is a molecule?
Example: water molecule
(
2 hydrogen atoms, 1 oxygen atom)Slide37
What is a molecule?
Example: oxygen
molecule
(2 oxygen atoms )Slide38
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.Slide39
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.Slide40
Atoms and Molecule movement
Example
: How does food coloring spread in a class of water?
Motion of the water molecules.