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LEXI NS 2021 > MATERIALS > Flashcards

MATERIALS Flashcards

1
Q

Fibers

A

Threads in plants and animal materials

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2
Q

Ceramics

A

Made of clay and sand

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3
Q

Plastics

A

Made from oil and coal

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4
Q

Brittle

A

Breaks easily

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5
Q

Absorbent

A

Soaks up a liquid easily

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6
Q

Raw material of glass

A

Sand is heated and melted

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7
Q

Raw material of ceramics

A

Clay which is baked by heating

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8
Q

Raw materials of leather

A

Animal skins that are tanned, crusted and finished

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9
Q

A manufactured material made from plants

A

Paper

Cotton (material)

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10
Q

Properties of glass

A

Brittle

Waterproof

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11
Q

Properties of clay

A

Brittle when baked
Becomes hard when baked
Soft when not baked
Flexible when not baked

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12
Q

Properties of wool

A

Flexible

Soft

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13
Q

Meaning of ‘properties’

A

The special things about a material that makes it good for certain uses

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14
Q

Malleable

A

Can be shaped easily

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15
Q

Brittle

A

Easily breaks into pieces

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16
Q

Dent

A

To make hollow on the surface

17
Q

Flexible

A

Material bends easily

18
Q

Stiff

A

Material doesn’t bend easily

19
Q

Waterproof

A

Does not allow water to pass through

20
Q

Absorbent

A

To soak up a liquid

21
Q

Example flexible objects

A

Ruler
Paper
String
Tissue

22
Q

Example stiff objects

A

Brick
Wood
Glass

23
Q

Is plastic stiff or flexible

A

Flexible

24
Q

Is a metal wire stiff or flexible?

A

Flexible

25
Q

How we test how hard or soft a material is?

A

See if we can scratch, cut or dent it

E.g. scratch wax candle with fingernail but not a ceramic cup.

26
Q

What are raw materials

A

As they are found in nature
Not changed in any way
Obtained from living and non-living things

27
Q

What are manufactured materials

A

Materials that have been changed or processed from raw materials by people

28
Q

Example raw materials

A 
Honey
Cotton
Chicken
Wood
Carrots
Soil
29
Q

Example manufactured materials

A 
Dress
Table
Oil
Jacket
Plastic
Glass
Jewellery
Leather
30
Q

How paper is made (steps)

A 
Chop trees
Cut logs and remove bark
Chip wood
Cook chips until soft
Move pulp over rollers
Drain water
Dye fibres
Dry with hot rollers
Cut paper
31
Q

The substance used to make paper when wood chips are cooked in water to soften the fibres

A

Pulp

32
Q

Plastic, paint and fabrics are all made from…

A

Coal and oil

33
Q

Fabric and leather are both made from…

A

Animal wool and hides

34
Q

Ceramics are made from…

A

Clay

LEXI NS 2021 (4 decks)

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