Matter and energy primary 3
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Transcript of Matter and energy primary 3
![Page 1: Matter and energy primary 3](https://reader036.fdocuments.net/reader036/viewer/2022081604/589cd50a1a28ab43388b5cf7/html5/thumbnails/1.jpg)
MATTER AND ENERGYPrimary 3
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MATTER CAN CHANGE IN MANY WAYS
• THESE CHANGES ARE CLASSIFIED INTO TWO TYPES:
• PHYSICAL CHANGES
• CHEMICAL CHANGES
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PHYSICAL CHANGES
• MATTER HAS DIFFERENT PROPERTIES
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IN A PHYSICAL CHANGE WE CAN CHANGE
• THE STATE OF MATTER
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IN A PHYSICAL CHANGE WE CAN CHANGE
• THE SHAPE OF MATTER
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IN A PHYSICAL CHANGE WE CAN CHANGE
• THE SIZE OF MATTER
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CHEMICAL CHANGES• BURNING
• IN A FIRE, WOOD BURNS AND CHANGES INTO A NEW SUBSTANCE CALLED ASH.
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CHEMICAL CHANGES
• RUSTING
• THIS METAL CHAIN IS CHANGING INTO RUST AS IT REACTS WITH WATER AND AIR.
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FORCES
• THERE ARE TWO TYPES OF FORCES THAT ACT ON OBJECTS
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PUSH FORCES
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PULL FORCES
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FORCES CAN ACT FROM A DISTANCE OR THROUGH CONTACT.
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WHEN THEY ACT FROM A DISTANCE THEY ARE CALLED NON-CONTACT
FORCES.
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WHEN THEY COME INTO CONTACT WITH THE OBJECT THEY ARE CALLED
CONTACT FORCES.
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NON-CONTACT FORCES
• MAGNETISM – IS A NON-CONTACT FORCE THAT CAN EITHER ATTRACT OR REPEL MAGNETIC OBJECTS.
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GRAVITY
• GRAVITY IS A NON-CONTACT FORCE THAT PULLS OBJECTS TOWARDS EACH OTHER.
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CONTACT FORCES
• APPLIED FORCE IS THE FORCE SOMEONE OR SOMETHING APPLIES TO ANOTHER OBJECT.
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BUOYANT FORCE
• WHEN AN OBJECT IS PUT IN A LIQUID THERE IS AN UPWARD FORCE ACTING ON IT CALLED BUOYANCY.
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FORMS OF ENERGY
• EVERYTHING WE DO NEEDS ENERGY.
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WE USE ENERGY TO DO OUR HOMEWORK, TO PLAY, TO HEAT OUR
HOUSES AND TO MOVE A CAR.
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LIVING AND NON-LIVING THINGS NEED ENERGY.
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NON-LIVING THINGS NEED ENERGY TO WORK.
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TOOLS
• USE ENERGY FROM PEOPLE MOVING THEM.
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MACHINES
• MOST MACHINES USE ENERGY FROM ELECTRICITY.
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SOME MACHINES GET THEIR ELECTRICITY FROM BATTERIES.
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MOST MEANS OF TRANSPORT USE ENERGY FROM BURNING FUEL.
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KINETIC ENERGY
• MOVING THINGS HAVE KINETIC ENERGY.
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ELECTRICAL ENERGY
• ELECTRICITY IS ELECTRICAL ENERGY.
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CHEMICAL ENERGY
• ANY CHEMICAL CHANGE IN MATTER HAS CHEMICAL ENERGY.
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LIGHT ENERGY
• THE SUN PRODUCES LIGHT ENERGY.
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SOUND ENERGY
• ANYTHING THAT IS MAKING A NOISE HAS SOUND ENERGY.
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THERMAL ENERGY
• ANYTHING THAT IS HOT HAS THERMAL ENERGY.
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SOURCES OF ENERGY
• THE ENERGY THAT WE USE EVERY DAY COMES FROM NON-RENEWABLE AND RENEWABLE SOURCES.
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NON-RENEWABLE ENERGY SOURCES.
• COAL, PETROLEUM AND NATURAL GAS ARE NATURAL MATTER.
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THEY WERE FORMED UNDER THE GROUND A VERY LONG TIME AGO.
• THEY ARE NON-RENEWABLE SOURCES OF ENERGY.
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• THERE IS NEVER NEW COAL, PETROLEUM OR NATURAL GAS.
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• THEY ARE LIMITED AND THEY WILL RUN OUT IN THE FUTURE.
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• BURNING THEM TO GET ENERGY POLLUTES AIR AND WATER.
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COAL IS A BLACK SOLID.
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PETROLEUM IS A BLACK LIQUID.
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NATURAL GAS IS A MIXTURE OF GASES.
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RENEWABLE ENERGY SOURCES
• THE SUN, WIND, WATER AND BIOMASS ARE RENEWABLE SOURCES OF ENERGY.
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• THERE IS ALWAYS NEW WIND, SUNLIGHT, WATER AND BIOMASS.
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• THEY ARE UNLIMITED AND THEY WILL NEVER RUN OUT.
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• THEY DON´T POLLUTE THE AIR OR WATER.
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SOLAR ENERGY
• COMES FROM SUNLIGHT.
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WIND ENERGY
• COMES FROM MOVING AIR.
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HYDROELECTRIC ENERGY
• COMES FROM MOVING WATER.
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BIOENERGY
• COMES FROM BURNING ORGANIC MATTER FROM PLANTS, CALLED BIOMASS.