Science, Unit 5

Question 1

List 6 properties of Metals

Answer 1

shiny
malleable
ductile
sonorous
conduct heat
magnetic

Question 2

Why is copper so useful and what is an example it can be used for?

Answer 2

electrical wire
it conducts electricity and is ductile

Question 3

what is ductile

Answer 3

means it can be drawn out into wires

Question 4

what does malleable mean

Answer 4

means they can be hammered into shape

Question 5

which part of a cooking pan should metal be used for

Answer 5

the cooking / heating part of the pan

Question 6

which part of a cooking pan should non-metal be used for and why

Answer 6

the handle so it won’t burn your hand

Question 7

name properties of non-metal

Answer 7

brittle, shatter / break easily, do not conduct heat / electricity

Question 8

what is the word used to describe materials that do not conduct electricity?

Answer 8

insulator

Question 9

why is helium used in balloons?

Answer 9

Hydrogen is lighter than air but it is flammable and as oxygen is present in the air, so the risk of explosion and fire is there. Helium is lighter than air and it is a non-combustible (flammable) gas so it used to fill balloons.

Question 10

what is an alloy?

Answer 10

a mixture containing 2 different types of metal atoms (in other words, alloys are metal mixtures)

Question 11

which properties of aluminium make it useful for building aeroplanes?

Answer 11

resistant to corrosion, lightweight, malleable

Question 12

why would you mix different metals (ie. alloy) to build certain things instead of using pure metals?

Answer 12

to make the metal stronger
for example: coins (silver+copper+nickel), jewellery (gold+copper+silver+zinc)

Question 13

what does corrosive mean?

Answer 13

can destroy living tissue and cause burns

Question 14

what safety gear should you use to protect yourself from dangerous acids

Answer 14

glove, safety glass

Question 15

draw 8 hazard warning labels

Answer 15

explosive
flammable
oxidising
corrosive
toxic
hazardous to environment
health hazard
serious health hazard

Question 16

how does an indicator show whether a substance is an acid or an alkali?

Answer 16

indicator turns one colour in an acid and a different colour if alkali

Question 17

is water an acid, alkali, or neutral and why?

Answer 17

neutral, green, ph7

Question 18

Name 3 types of indicator

Answer 18

Litmus paper
Universal indicator
PH solution

Question 19

strength of acids and alkalis are measured on the ________ ?

Answer 19

PH scale