HOLY CROSS HIGH SCHOOL
S1 SCIENCE
Homeworks for Stopping
Heat on the Move
Insulator
In Our Homes
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Heat Homework 1- Conductors and Insulators
1.
A material in a building catalogue is listed as being
‘a good conductor of heat’
2.
a)
Explain what is meant by a good conductor of heat
b)
Give two examples of materials that are good conductors of heat.
A girl decides to bake a cake. She has the following items on her
kitchen work top.
A metal pot, an oven glove, a glass measuring cup, a wooden spoon,
a plastic mixing bowl, a metal rolling pin, a paper recipe book,
a metal baking tray for her cakes, paper cake cases and some tin foil.
List the items which are good conductors and those which are
good insulators in the table below.
Good Conductors of Heat
3.
Good Insulators of heat
Some metals conduct heat better than others, put the following metals in
order of how they conduct heat, starting with the best conductor first.
Aluminium, Steel, Copper, Brass
4.
Design, and give a detailed description of, a pot that would
(i)
be good at letting through heat at the base of the pot
(ii) not transfer heat well from the sides of the pot
(iii) not burn your hands when you lifted it up.
Heat Homework 2- Air
1.
Your Science teacher demonstrated the following experiment to
you in class.
Match A
Air
Match B
Metal Bar B
Metal Bar A
Clamp Stand
Bunsen burner & mat
Clamp Stand
Diagram 4
Describe what happened and explain why it happened.
2.
Why do you not burn your hands when you drink hot tea from a
polystyrene cup.
3.
Research using the internet or any other means what tog measures
when buying a bed quilt.
Cot Bed Duvet Quilt Winter 9
tog Baby Junior 120 x 150
4.
(a)
Describe how some animals keep warm during the winter
months.
(b)
Some animals shed their coats at different times of the year.
(i)
(ii)
Give 2 examples of animals that do this.
Explain why this happens.
Heat Homework 3- Convection
1.
Explain how the experiment shown below shows us that water
is not a good conductor.
Test tube with water
Thermometer
Clamp Stand
Bunsen burner & mat
2.
Copy and complete the diagram shown below in to you jotter.
and show the path of The heated water
______water falls
3.
________water rising
Copy and complete the following paragraph in your jotters.
Water and _ _ _ use _ _ _ _ _ _ _ _ _ _ currents to heat up.
Hot water _ _ _ _ _ and cold water _ _ _ _ _ downwards.
Hot air also _ _ _ _ _ and cooler air _ _ _ _ _ downwards.
4. Describe one use of convection in your home.
Heat Homework 4- Radiation
1.
Describe how radiation travels from the Sun to Earth.
Sun
Earth
2.
How fast does heat radiation travel from the Sun to Earth?
3.
Explain why it is better to wear dark clothes rather than light
coloured clothes in the winter.
4.
A man paints a radiator in one room white and a radiator in another
room black.
5.
(a)
Which radiator will emit more heat, explain your answer.
(b)
Some people put silver paper behind a radiator. Give a reason
Why they do this.
Why do people in hot countries paint their houses white?
Heat Homework 5- Heat loss from our homes
1.
2.
A thermal imaging camera can detect heat being given off by an
Object.
(a)
What is the name given to this type of radiation?
(b)
What speed does this type of radiation travel at?
A thermogram of heat loss in a house is shown below.
State where is heat being lost from this house, justify your answer.
3.
We need to prevent heat loss from our homes.
Copy and complete the table below.
Where heat can be lost in
our home
How this can be prevented