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NST GRADE 5 TERM 2 > NST TERM 2 > Flashcards

NST TERM 2 Flashcards

1
Q

What does properties of metal mean

A

It means the quality of matter and material

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2
Q

What are the properties of metal

A

It is strong
It is hard
It is shiny
It can be hammered or beaten into shapes - it is malleable
It can be drawn into thin wire - It is ductile
It can melt at high temperatures

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3
Q

What are the properties of Iron

A

It is hard and strong
It is used to make tools, nails, wire fences and weapons
Problem: It rusts

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4
Q

What are the properties of Gold

A

It is a valuable metal
It is very malleable - nice to make Jewellery
It always shines

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5
Q

What are the properties of Silver

A

It is a valuable metal
been used for 8000 years
Shines brightly
You can make jewellery from it

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6
Q

What are the properties of Copper

A

It has been used since 6000BC
Makes ornaments and weapons
It conducts electricity
Is used for electric wires

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7
Q

What are the properties of Aluminium

A

It is very light and strong
It is used to make aircraft
It is the most metal on earth

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8
Q

What are the properties of Zinc

A

It is used to cover iron so that it does not rust

Waterbuckets are made with iron and covered with zinc

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9
Q

What does plated mean

A

When you cover cheap metal with a thin layer of expensive metal.

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10
Q

What are metals useful for

A

It is useful for conducting heat and for magnetism

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11
Q

What does it mean if something conducts heat

A

If you put a metal rod in a fire, not long after your hand will feel the heat. The metal rod is conducting heat. Metals are good conductors of heat.
Pots and pans have wooden or plastic handles otherwise your hands will burn from the conducting.

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12
Q

Why are pots and pans made from metal

A

Because it is a good heat conductor

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13
Q

What does magnetism mean

A

Some metals are magnetic

Metals that are attracted to magnets are magnetic

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14
Q

Are metals always magnets themselves

A

No

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15
Q

What will happen if a metal is non magnetic

A

It will not attract to a magnet

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16
Q

Which metals are magnetic

A

Nickel
Cobult
Iron
Steel

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17
Q

How does metals tarnish or rust

A

Air and water makes metal change
All metals start of shiny but go dull in air
We say metal tarnish or corrode (rust)

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18
Q

What does rust mean

A

Iron becomes reddish-brown and breaks into small bits

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19
Q

What metal does not corrode or rust

A

Gold

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20
Q

What metal easily rusts

A

Iron

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21
Q

What is the only metal that rusts

A

Iron

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22
Q

What are the properties of non metals

A 
It breaks easily
They are dull
Poor heat conductors
Not malleable
Not ductile
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23
Q

What is polymer

A

Plastic, rubber and fabrics

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24
Q

What is ceramic

A

Objects make from clay or sand

25
Q

Give examples of non metals

A 
Glass
Rubber
Sand
Leather
Clay
Fabric
Wood
Water
Wax
26
Q

How can you stop iron and steel from rusting

A

Coat them in plastic
Paint them
Coat them in another metal that does not rust
Coat them with oil or grease

27
Q

What does it mean to combine materials

A

We put materials together in a certain way

28
Q

In which ways can we process materials

A

Mix and set
Cook
Coor or dry

29
Q

What does mixing and setting mean

A

You mix materials that become hard after you mix it.

30
Q

What is polyfilla

A

It is like plaster of paris and is used to fill cracks in the wall

31
Q

What is concrete

A

It is sand, gravel and cement mixed with water

32
Q

What is concrete used for

A

Roads
Foundations
Pillars

33
Q

What does reinforced mean

A

It means to make something stronger

Concrete can be reinforced with iron bars when we build dams and bridges

34
Q

What mixture is useful to shape and set in a particular shape

A

Cement

35
Q

What is plaster of paris

A

It is make from gypsum
It is mixed with water to make a paste
It is malleable
Sets and becomes hard

36
Q

What do you do with plaster of paris and water

A

Mix it
Set it
Make ornaments

37
Q

What do you do with Polyfilla and water

A

Mix it
Make a paste
Fill cracks
set

38
Q

What do you do with Cement, sand, gravel and water

A

Mix it

Makes concrete

39
Q

What do you do with Flour and water

A

Mix it
Make a paste
Makes glue

40
Q

What do you do with Clay and limestone

A

Heat it
Grind it
Make cement

41
Q

What do you do with Jelly and hot water

A

Mix it
Cool it
Makes solid Jelly

42
Q

What do you do with Clay

A

Shape it into blocks
Dry it in the air
Heat it to make it strong
Makes bricks

43
Q

What is ore

A

A type of rock that contains minerals and metals

44
Q

What is alloy

A

Two or more metals mixed together, or a metal mixed with a non metal

45
Q

What does evaluate mean

A

To look at what you have done and think of how to do it better next time

46
Q

What are factors

A

Things that play a role in a result

47
Q

What is flexibility

A

How easily a material bends

48
Q

What does brittle mean

A

Something easily breaks into pieces when it falls

49
Q

What does magnetic mean

A

Attracted to a magnet

50
Q

What does attracted mean

A

Pulled towards something

51
Q

What does tarnish mean

A

A metal changing and going dull

52
Q

What does corrode mean

A

A metal breaking down

53
Q

What are ingredients

A

The list of raw materials that are selected to go into a mixture

54
Q

What is a process

A

Change in different ways to get new materials or products with new properties

55
Q

What are products

A

Something new and useful coming out of a process

56
Q

What is a mixture

A

Something that is made by mixing things together

57
Q

What is cement

A

a product made from clay and limestone that becomes hard when mixed with water

58
Q

What is a paste

A

A thick mixture of a solid and a liquid.

59
Q

What does dissolve mean

A

Mixes completely in water

NST GRADE 5 TERM 2 (2 decks)

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