NST TERM 2

Question 1

What does properties of metal mean

Answer 1

It means the quality of matter and material

Question 2

What are the properties of metal

Answer 2

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

Question 3

What are the properties of Iron

Answer 3

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

Question 4

What are the properties of Gold

Answer 4

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

Question 5

What are the properties of Silver

Answer 5

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

Question 6

What are the properties of Copper

Answer 6

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

Question 7

What are the properties of Aluminium

Answer 7

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

Question 8

What are the properties of Zinc

Answer 8

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

Waterbuckets are made with iron and covered with zinc

Question 9

What does plated mean

Answer 9

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

Question 10

What are metals useful for

Answer 10

It is useful for conducting heat and for magnetism

Question 11

What does it mean if something conducts heat

Answer 11

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.

Question 12

Why are pots and pans made from metal

Answer 12

Because it is a good heat conductor

Question 13

What does magnetism mean

Answer 13

Some metals are magnetic

Metals that are attracted to magnets are magnetic

Question 14

Are metals always magnets themselves

Answer 14

No

Question 15

What will happen if a metal is non magnetic

Answer 15

It will not attract to a magnet

Question 16

Which metals are magnetic

Answer 16

Nickel
Cobult
Iron
Steel

Question 17

How does metals tarnish or rust

Answer 17

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

Question 18

What does rust mean

Answer 18

Iron becomes reddish-brown and breaks into small bits

Question 19

What metal does not corrode or rust

Answer 19

Gold

Question 20

What metal easily rusts

Answer 20

Iron

Question 21

What is the only metal that rusts

Answer 21

Iron

Question 22

What are the properties of non metals

Answer 22

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

Question 23

What is polymer

Answer 23

Plastic, rubber and fabrics

Question 24

What is ceramic

Answer 24

Objects make from clay or sand

Question 25

Give examples of non metals

Answer 25

``` Glass Rubber Sand Leather Clay Fabric Wood Water Wax ```

Question 26

How can you stop iron and steel from rusting

Answer 26

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

Question 27

What does it mean to combine materials

Answer 27

We put materials together in a certain way

Question 28

In which ways can we process materials

Answer 28

Mix and set Cook Coor or dry

Question 29

What does mixing and setting mean

Answer 29

You mix materials that become hard after you mix it.

Question 30

What is polyfilla

Answer 30

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

Question 31

What is concrete

Answer 31

It is sand, gravel and cement mixed with water

Question 32

What is concrete used for

Answer 32

Roads Foundations Pillars

Question 33

What does reinforced mean

Answer 33

It means to make something stronger Concrete can be reinforced with iron bars when we build dams and bridges

Question 34

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

Answer 34

Cement

Question 35

What is plaster of paris

Answer 35

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

Question 36

What do you do with plaster of paris and water

Answer 36

Mix it Set it Make ornaments

Question 37

What do you do with Polyfilla and water

Answer 37

Mix it Make a paste Fill cracks set

Question 38

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

Answer 38

Mix it | Makes concrete

Question 39

What do you do with Flour and water

Answer 39

Mix it Make a paste Makes glue

Question 40

What do you do with Clay and limestone

Answer 40

Heat it Grind it Make cement

Question 41

What do you do with Jelly and hot water

Answer 41

Mix it Cool it Makes solid Jelly

Question 42

What do you do with Clay

Answer 42

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

Question 43

What is ore

Answer 43

A type of rock that contains minerals and metals

Question 44

What is alloy

Answer 44

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

Question 45

What does evaluate mean

Answer 45

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

Question 46

What are factors

Answer 46

Things that play a role in a result

Question 47

What is flexibility

Answer 47

How easily a material bends

Question 48

What does brittle mean

Answer 48

Something easily breaks into pieces when it falls

Question 49

What does magnetic mean

Answer 49

Attracted to a magnet

Question 50

What does attracted mean

Answer 50

Pulled towards something

Question 51

What does tarnish mean

Answer 51

A metal changing and going dull

Question 52

What does corrode mean

Answer 52

A metal breaking down

Question 53

What are ingredients

Answer 53

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

Question 54

What is a process

Answer 54

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

Question 55

What are products

Answer 55

Something new and useful coming out of a process

Question 56

What is a mixture

Answer 56

Something that is made by mixing things together

Question 57

What is cement

Answer 57

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

Question 58

What is a paste

Answer 58

A thick mixture of a solid and a liquid.

Question 59

What does dissolve mean

Answer 59

Mixes completely in water