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