Transcript Concept 3 - Newton`s Third Law of Motion

Mrs. Loewen’s Theme Class
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Physical Properties- those properties that can be
observed without changing the make-up or
identity of the matter.
 Malleable- able to be pounded into a thin sheet
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Electrical Conductivity- allows electricity to travel
through
Density
Boiling point
Melting point
Solubility
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Chemical Properties- describe matter based on
its ability to change into a new kind of matter
with different properties
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Flammability- capable of burning in the presence of
oxygen
Rusting- when iron reacts with oxygen to produce
iron oxide
Reactivity- reacts to acid or water
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Heat and Temperature are NOT the same
thing.
Heat is the amount of thermal energy in the
object
Temperature is the measure of how rapidly
molecules are moving.
We can think of it like this, which
container, the tub or the cup would melt a
large ice cube faster?
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Put two inches of water in a soda
bottle. Break up one seltzer tablet and
put the pieces in the balloon.
Carefully fit the balloon over the neck
of the bottle so none of the seltzer
pieces goes into the bottle.
What states of matter are in this
system?
Solid
Melting
Point
Freezing
Liquid
Vaporization/ Gas
Boiling Point
Condensation
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When water freezes does it produce any heat?
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Yes, as water freezes it releases heat into the air
around it.
Why do citrus farmers spray water on their
crops the evening before it is going to freeze?
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As the water freezes it releases heat that keeps the
fruit from freezing.
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Electrons:
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Protons:
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positively charged particles in the nucleus
Neutron:
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negatively charged particle on the outside of the
nucleus.
particles with no charge in the nucleus
Nucleus:
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center of the atom
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Velocity = distance / time
v=d/t
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Example: miles per hour. Miles is the distance, and hour is the time.
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d
v
t
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Mass- is the
amount of matter
in an object
Weight- the
gravitational pull
of on an object
What happens to the card and the coin if I flick
the card off the cup?
 To what object did I apply a force?
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Newton’s First Law of Motion –
“an object at rest will remain at rest unless a force
acts on it.”
Also, “an object in motion will remain in motion
unless a force acts on it.”
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Take a straw, ping-pong ball, and golf ball.
Blow on the ping-pong ball with the SAME
force each time. Measure the distance and find
the average. Repeat 3 times.
Do the same with the golf ball.
Repeat with a GREATER force.
Newton’s Second Law of Motion
Mass = Force x Acceleration
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With two rolling chairs or scooters, have two
students who weigh about the same sit on
them. Have student 1 push off of student 2.
Who is going to move further, the student
pushing (1) or the student pushed (2)?
Will the distance the students travel change
depending on who pushes?
Newton’s Third Law of Motion
“For every force, there is an equal and opposite
force.”
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Lever Parts:
Fulcrum -point from which your lever
rotated.
Load. Does anyone know what the load
was?
Effort force: force applied to the lever to
move the load. Where did the effort force
come from?
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Name a type of simple machine and give a definition:
 Levers are stiff bars that rotate around a fulcrum to
move objects.
 Pulleys use a wheel and a rope to raise and lower
loads.
 Wedges have slanted sides that cut materials apart.
 Inclined planes are a slanting slope that connects a
higher and lower point.
 Screw is an inclined plane that is set in a circular
pattern.
 Wheel and axis is a wheel with a rod going through it.
That wheel rotates around the rod/axis to move a load.
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What type of energy do each of these objects
represent?
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Scientists measure energy all the time.
Scientist have found that anytime energy
transfers, no energy is lost.
If you were able to measure the air around the
bouncy ball or the marbles, you would notice
that heat was being released.
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When you coast down the hill on your bike,
you travel for a distance and then eventually
slow down. Is energy being destroyed?
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No, energy is being transferred to sound and heat
energy.
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We see objects because they reflect or produce
light.
White light is made of many colors.
An object’s color is determined by the color of
light that is reflected by the object.
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If I have metal tongs
in a pot of boiling
water, what happens
to the handles?
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Conduction is the process of heat transfer
through the collision of particles.
The objects being heated are in contact with one
another and don’t move from one place to
another.
Can you think of any examples of materials that
get hot very quickly?
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Have you ever swam in a lake
or outdoor swimming pool in
the summer?
Where is the water the
warmest? Where is it the
coolest?
Why?
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What do you suppose
these people are doing?
How do you know this?
What do you think those
waves coming off the
fire represent?
Do all hot objects sent off
heat waves?
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This heat traveled to your body in heat waves.
Radiation occurs without the movement of
particles and sometimes across empty space.