4 th grade CATS Science Review Properties of Heat Electricity Circuits Magnetism Jamey Herdelin...
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Transcript of 4 th grade CATS Science Review Properties of Heat Electricity Circuits Magnetism Jamey Herdelin...
4th grade CATSScience Review
Properties of HeatElectricityCircuits
MagnetismJamey Herdelin
Maupin ElementaryApril 2004
PowerPoint template by Anna Jones
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HeatHeat ElectricityElectricity CircuitsCircuits MagnetismMagnetism
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Heat – what is it?
A form of energy.
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What kind of heat is produced when two objects rub against each other?
Friction
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Conduction – the process of transferring heat from 1 molecule to another.
Example is a metal pan placed on a stove. Heat rises up the sides of the pan and to the handle.
Heat can travel by conduction or be absorbed. What does conduction mean and give an example.
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Define heat absorption and give an example.
Absorption – heat is taken in and held in an object.
Example is the black driveway on a sunny day absorbs the sun’s rays and gets hot.
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It will turn from a solid into a liquid, possibly even into a gas.
What happens when you add heat to a solid mass like water?
What state of matter will it become?
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The flow of negative charges through matter.
What is an electric circuit?
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It is a measure of how much a material opposes the flow of electric current and changes electric current into heat energy.
What is resistance, in terms of electric currents?
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Light bulbs
What do we use daily in our homes that lights your life because it has a coiled wire inside that has high resistance?
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A conductor – metal, water
What do you call a material that allows electric current to pass through easily?
Give an example.
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What do you call a material that does not let an electric current pass through easily?
An insulator - glass, wood, rubber, plastic
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It needs a source of electricity (like a battery);
some type of conductor (metal wire), that forms the path;
a control device (switch) to control the electric current; and
an appliance (light bulb, motor, loudspeaker).
What 4 things does an electric circuit need to work?
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What happens to a light bulb if the electric circuit is an open circuit?
It does not light up because there is a break somewhere in the circuit – the electric current has been stopped.
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What kind of circuit do you create when you flip a switch and the ceiling fan starts moving?
Created a closed circuit because electric current is flowing.
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A series circuit contains a couple of objects along a single path.
A parallel circuit connects several objects in a way that the current for each object has its own path.
What is the difference between a series circuit and a parallel circuit?
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In a series circuit, the 2nd light bulb is out because the circuit is open.
In a parallel circuit, the 2nd light bulb is on because it has its own closed circuit.
If you have a circuit with 2 light bulbs, what happens to the 2nd light bulb if the first light bulb in a series circuit is loose; what happens if it is a parallel circuit?
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What is a magnet and give an example of when we use them?
A magnet is anything that pulls iron, steel, and certain other metals together.
Examples are magnets on the refrigerator door & the refrigerator door.
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Attraction
What term describes a magnet’s ability to pull things towards it
- attraction or repulsion?
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• Repulsion
What term describes a magnet’s ability to push things away – attraction or repulsion?
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Electricity
What can you make from magnets? Hint - if you are seeing this question on a big screen, a magnet helped get it there.
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What happens to a coil of wire when you run electricity through it? What is it called?
It becomes a temporary magnet & is called an electromagnet.
Bonus Question 1Bonus Question 1
Bonus Question 2Bonus Question 2