PPM

Question 1

Properties of ceramic

Answer 1

Poor conductor of electricity
Hard
Brittle
Does not corrode
Has a high melting point
Can be moulded into shapes

Question 2

Properties of metal

Answer 2

Shiny
Good conductor of heat
Good conductor of electricity
Can be moulded into shapes
Can be bent without breaking

Question 3

Properties of glass

Answer 3

Transparent
Poor conductor of heat
Poor conductor of electricity
Can be moulded into shapes
Has a high melting point
Brittle

Question 4

Properties of plastic

Answer 4

Lightweight
Does not corrode
Can be moulded into shapes
Has a low melting point
Poor conductor of heat
Poor conductor of electricity

Question 5

Properties of fibres

Answer 5

Can be spun into threads and woven into fabrics
Able to absorb dyes
Poor conductor of heat
Poor conductor of electricity

Question 6

Description of electrical conductivity

Answer 6

The measure of how easily an electric current flows through it

Question 7

Description of thermal conductivity

Answer 7

The measure of how easy heat flows through it

Question 8

Description of melting point

Answer 8

The temperature at which a substance changes from a solid state to a liquid state

Question 9

Description of boiling point

Answer 9

The temperature at which a substance changes from a liquid state to a gaseous state

Question 10

Description of hardness

Answer 10

The ability of a material to withstand scratches

Question 10

Description of strength

Answer 10

The ability of a material to support a heavy load without changing its shape permanently

Question 11

Description of flexibility

Answer 11

The ability of a material to bend without breaking, and return to its initial shape and size after breaking

Question 12

Description of density

Answer 12

The amount of matter an object has in proportion to its volume

Question 13

SI unit for length

Answer 13

metre (m)

Question 14

SI unit for mass

Answer 14

kilogram (kg)

Question 15

SI unit for time

Answer 15

second (s)

Question 16

SI unit for temperature

Answer 16

kelvin (K)

Question 17

SI unit for electric current

Answer 17

ampere (A)

Question 18

Prefix for kilo

Answer 18

10^^3

Question 19

Prefix for deci

Answer 19

10^^-1

Question 20

Prefix for centi

Answer 20

10^^-2

Question 21

Prefix for milli

Answer 21

10^^-3

Question 22

Precision for metre rule and measuring tape

Answer 22

Smallest division (0.1cm)

Question 23

Precision for digital calipers

Answer 23

0.1mm

Question 24

Precision for electronic balance

Answer 24

follow instrument

Question 25

Precision for thermometer

Answer 25

(half smallest division)

Question 26

Precision for measuring cylinder

Answer 26

half smallest division

Question 27

Precision for electronic stopwatch

Answer 27

Record to 0.1s due to human reaction time