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Natural Science Gr 6 PHPS > Energy and change, Systems and control (Term 3) > Flashcards

Energy and change, Systems and control (Term 3) Flashcards

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1
Q

What is a Battery?

A

Two or more cells connected to provide electrical energy.

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2
Q

What is insulation?

A

Covering on circuit wires that keep the electric current in the wires, also to prevent you from being shocked.

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3
Q

What is a conductor?

A

A material that allows an electric current to flow through it.

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4
Q

What is a buzzer?

A

An electric device that converts electrical energy into sound energy.

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5
Q

What is a cell?

A

A source of electrical energy that stores and then supplies energy to a circuit.

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6
Q

What is an electric motor?

A

An electric device that converts electrical energy into movement energy.

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7
Q

What is an electric current?

A

The movement of an electric charge through a conductor.

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8
Q

What is an output?

A

Device component that changes electrical energy into another form of energy

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9
Q

What are components?

A

Parts of an electric circuit

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10
Q

What is a circuit diagram?

A

Diagram of an electric circuit using standard symbols for electric components

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11
Q

What is a switch

A

A component for controlling whether the current flows in an electrical circuit

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12
Q

Where does the device get its energy?

A

From a source

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13
Q

What are most electrical cables made of?

A

Copper

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14
Q

Give 3 examples of output energy

A

heat, sound, movement, light.

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15
Q

Why do we get electricity?

A

because all matter has positive and negative particles, same charge repels and opposite charges attract

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16
Q

A positive particle will ATTRACT/REPEL a negative particle.

A

ATTRACT

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17
Q

A negative particle will ATTRACT/REPEL another negative particle.

A

REPEL

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18
Q

Where does an electric charge come from?

A

An energy source such as a battery.

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19
Q

What does an electrical circuit consist of (mainly)?

A
  • A source of energy
  • Conducting material
  • A device
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20
Q

What do we call electric charges that move through a closed loop (and continuous path)?

A

An electric circuit

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21
Q

Electricity needs a ___________ to flow.

A

Continuous path

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22
Q

What is the role of a circuit?

A

To send electricity from the source to the device.

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23
Q

What is the role of a device?

A

To change electrical energy into useful output energy.

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24
Q

What 3 things does an electric system mainly consist of?

A

An input source, a device and an output.

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25
Q

Name two types of energy and explain the difference.

A

Current- when it flows from one place to another

Static- when it is gathered in one spot

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26
Q

Explain what an electric circuit is

A

A pathway of electricity (system) used for transferring energy from one place to another.

27
Q

What do you understand by the term “mains electricity?’

A

The electricity that comes directly from a power station.

28
Q

How does a system work? (Hint: Use the words ‘source, device, continuous path, output energy, electricity’.)

A

The source sends electrical energy through the conducting material (wires), to the device, which turns it into useful output energy such as light or sound. It needs a continuous path to flow.

29
Q

What is the best conducting material used in wires?

A

Silver

30
Q

A good conductor is a [ . ] insulator, and a good insulator is a [ . ] conductor.

A

poor and poor

31
Q

What are primary energy sources?

A

An energy source that hasn’t been changed in any way and can be used to produce other sources of energy e.g. water, fire, wind, gas, sun.

32
Q

What are secondary sources of energy?

A

Energy made from a primary energy source, e.g. heat

33
Q

What are natural energy sources?

A

Sources of energy that can be found naturally, Wind

34
Q

Where can oil be found, what exactly is it, and how is it processed?

A

Oil comes from deep underground in parts of the world. It cannot used until it has gone through a process called refining. Oil is a natural source of energy.

35
Q

Where can gas be found? How is stored? What is it?

A

Gas is often found in same places as oil. Must be stored under pressure in special tanks. Is a natural source of energy.

36
Q

What is coal?

A

A natural source of energy

37
Q

How do you mine coal?

A

In some places, coal is near the surface - that is mined using strip mining. Coal mines are in northern Limpopo and KZN.

38
Q

What is uranium used to produce, and where is it mined?

A

Uranium can be used to produce nuclear energy. Mined in Northwestern parts of SA. Koeberg produced first SA nuclear energy using Uranium.

39
Q

How do we use wind to make electricity? Where can I find a wind farm?

A

Wind is used to turn large windmills, which in turn creates electricity. there’s a wind farm near Darling, just north of Cape Town.

40
Q

Biomass is = Renewable/non-renewable energy?

A

Renewable energy

41
Q

Biomass is used for..

A

Heating, transportation, electricity.

42
Q

Natural gas= Renewable/non-renewable energy?

A

non-renewable energy

43
Q

Natural gas is used for..

A

electricity, heating, manufacturing

44
Q

Uranium= Renewable/non-renewable energy?

A

non-renewable energy

45
Q

Uranium is used for..

A

electricity

46
Q

Hydro power= Renewable/non-renewable energy?

A

Renewable energy

47
Q

Hydro power is used for..

A

electricity

48
Q

Wind= Renewable/non-renewable energy

A

Renewable energy

49
Q

coal is used for..

A

electricity, manufacturing

50
Q

Solar energy= Renewable/non-renewable energy

A

Renewable energy

51
Q

Geothermal is used for..

A

heating, electricity

52
Q

Petroleum is used for..

A

transportation, manufacturing.

53
Q

Wind is used for..

A

electricity

54
Q

Propane is used for..

A

manufacturing, heating

55
Q

Solar energy= Renewable/non-renewable energy

A

Renewable energy

56
Q

Solar energy is used for..

A

heating, light, electricity

57
Q

Solar energy is used for..

A

heating, light, electricity

58
Q

Rubber band= Conductor/Insulator

A

Insulator

59
Q

coin= Conductor/Insulator

A

Conductor

60
Q

toothpick= Conductor/Insulator

A

Insulator

61
Q

key= Conductor/Insulator

A

Conductor

62
Q

paperclip= Conductor/Insulator

A

Conductor

63
Q

Piece of glass= Conductor/Insulator

A

Insulator

Natural Science Gr 6 PHPS (10 decks)

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