Download 7A Practice Papers

7A Practice Papers
Level 3 - 7
minutes
marks
Page 1 of 36
Q1.
Bindweed is a plant that grows tightly around other plants.
The drawing below shows bindweed growing around a rose bush.
(a)
Complete the sentences below. Choose from the words in the list.
air
(i)
light
support
water
minerals
Bindweed grows as high as possible on the rose bush so that the bindweed
can get as much .................................... as possible.
1 mark
(ii)
Bindweed grows around the rose bush because the rose bush provides
....................................... for the bindweed.
1 mark
(b)
A gardener cut through the stem of the bindweed at X.
Two days later the bindweed above X was dead.
Why did the bindweed die?
Tick the correct box.
no air
no light
no warmth
no water
1 mark
(c)
The gardener adds fertiliser to the soil to help her rose bushes to grow well.
What do plants get from the fertiliser?
Tick the correct box.
acids
minerals
sugars
vitamins
1 mark
Page 2 of 36
(d)
Plant roots have root hairs.
Which diagram shows a root hair?
Tick the correct box.
not to scale
1 mark
maximum 5 marks
Q2.
The diagram shows a plant cell. Some parts of the cell are named.
(a)
Which two named parts are present in plant cells but not animal cells?
1. ..................................................................................................................
2. ..................................................................................................................
2 marks
Page 3 of 36
(b)
Which named part contains the genetic information?
......................................................................................................................
1 mark
(c)
Which named part absorbs light energy for photosynthesis?
......................................................................................................................
1 mark
(d)
Name the part labelled X on the drawing.
......................................................................................................................
1 mark
(e)
Where in a plant would you find a cell like the one in the diagram?
Tick the correct box.
in the centre of a root
in the lower surface of a
leaf
near the upper surface
of a leaf
near the surface of a root
1 mark
Maximum 6 marks
Q3.
The diagram shows a plant cell.
(a)
(i)
The cell is from a leaf. Give the name of the part which is present in this leaf cell but
not present in root cells.
.............................................................................................................
1 mark
(ii)
Give two parts, labelled on the diagram, which are not present in animal cells.
1. ................................................. 2. .................................................
2 marks
Page 4 of 36
(b)
The five parts of the cell labelled on the diagram have different functions.
In the table below, write the name of the correct part of the cell next to its function.
One has been done for you.
4 marks
Maximum 7 marks
Q4.
The diagram below shows a cell from the inside of a human cheek.
(a)
On the diagram, label parts A, B and C.
3 marks
(b)
Plant cells have some parts which animal cells do not have. Name two of these
parts.
1. .....................................................................
2. .....................................................................
2 marks
Maximum 5 marks
Page 5 of 36
Q5.
Sam made a model cat.
He mixed modelling powder with water.
He poured all of the mixture into a mould.
He covered the mould with plastic film so that water could not evaporate.
(a)
(i)
After 10 minutes, Sam removed the model cat from the mould.
Sam had mixed 40 g of modelling powder with 12 g of water.
What was the mass of the model cat?
................. g
(ii)
Complete the sentence below using words from the list.
gas
liquid
solid
vapour
After 10 minutes, the mixture in the mould changed from a
.......................................... into a .............................................
2 marks
Page 6 of 36
(b)
Sam attached a small magnet to the model cat.
The magnet was attracted to the fridge door.
What metal are magnets made from?
...................................................
1 mark
(c)
Sam made another model, B. He attached a small magnet to model B.
(i)
Sam placed model A next to model B. The magnets attracted each other.
Label the poles on the magnet on model B
Use the letters N and S.
(ii)
Sam then turned the magnet on model A around.
What would happen to model B?
..........................................................
2 marks
maximum 5 marks
Page 7 of 36
Q6.
The list below shows properties that different elements can have.
(a)
•
magnetic
•
can be compressed
•
very high melting point
•
very low melting point
•
good conductor of heat
•
poor conductor of heat
•
good conductor of electricity
•
poor conductor of electricity
Which two properties from the list above make aluminium suitable for saucepans?
1. .................................................................................................................
2. .................................................................................................................
2 marks
(b)
Which property in the list above explains why:
(i)
copper is used in the cable of a television?
.............................................................................................................
1 mark
(ii)
a lot of oxygen gas can be pumped into a very small container?
.............................................................................................................
1 mark
Maximum 4 marks
Q7.
The thermometer drawn below can be used to measure the temperature of the human
body.
(a)
(i)
What is the lowest temperature this thermometer can measure?
..............°C
1 mark
Page 8 of 36
(ii)
What is the normal temperature of the human body?
Tick the correct box.
37°C
39°C
41°C
1 mark
(iii)
When we are ill our temperature may go up.
A nurse can measure a child’s temperature with two different thermometers
as shown below.
Give one reason why it is safer to use a plastic strip thermometer than a
glass thermometer.
.............................................................................................................
.............................................................................................................
1 mark
(b)
Viruses are micro-organisms that can make us ill.
Give the name of one other type of micro-organism that can make us ill.
................................................................
1 mark
(c)
Alcohol and mercury are two liquids that can be used in glass thermometers.
The table gives information about these liquids.
(i)
liquid
boiling point (ºC)
colour
alcohol
78
colourless
mercury
357
shiny grey
A red dye is added to the colourless alcohol used in thermometers.
Suggest a reason for this.
.............................................................................................................
.............................................................................................................
1 mark
Page 9 of 36
(ii)
Choose words from the list below to fill the gaps in the sentences.
gas
liquid
solid
When alcohol and mercury boil they both change from a liquid to
a ......................................
1 mark
A thermometer containing mercury can be used to measure the
temperature of an oven at 150°C because mercury is a
....................................... at 150°C.
1 mark
maximum 7 marks
Q8.
Sarah wanted to find out how the length of a copper rod changes when it is heated.
She fixed one end of the rod and allowed the other end to roll on a pin which had been put on a
glass plate.
A drinking straw, attached to the pin , showed the movement of the end of the rod.
(a)
(i)
What happens to the motion of the copper atoms in the rod as it is heated?
.............................................................................................................
.............................................................................................................
1 mark
(ii)
What happens to the average distance between the atoms of copper when the rod is
heated?
.............................................................................................................
.............................................................................................................
1 mark
Page 10 of 36
(b)
The graph shows the length of a copper rod at different temperatures.
The rod was 300.0 mm long at room temperature.
(i)
At what temperature has the rod increased its length by 1.0 mm?
…………………… °C
1 mark
(ii)
The rod was 300.0 mm long at room temperature. What will its length become if it is
placed in melting ice at 0°C?
…………………… mm
1 mark
Maximum 4 marks
Page 11 of 36
Q9.
Diagram A represents a gas in a container.
The gas can be compressed by moving the piston to the right.
(a)
(i)
How can you tell that the substance in the container is a gas?
...............................................................................................................
...............................................................................................................
1 mark
(ii)
How can you tell from the diagram that the gas is pure?
...............................................................................................................
...............................................................................................................
1 mark
(b)
The piston is moved to the right as shown in diagram B.
How can you tell, from diagram B, that the pressure of the gas has increased?
........................................................................................................................
........................................................................................................................
1 mark
Page 12 of 36
(c)
Diagram C shows what happened to the molecules after the gas was
compressed more.
(i)
How can you tell that a chemical reaction happened when the gas was
compressed?
...............................................................................................................
...............................................................................................................
1 mark
(ii)
The mass of the gas in both diagrams B and C was 0.3 g.
Why did the mass of the gas not change when it was compressed?
...............................................................................................................
...............................................................................................................
1 mark
(iii)
Complete the table below with the correct chemical formula of each
substance. Use the key to help you.
1 mark
(iv)
What is the name of the substance represented by the symbol
?
.................................................
1 mark
maximum 7 marks
Page 13 of 36
Q10.
(a)
The drawing below shows the parts of a torch.
(i)
Paul closed the switch.
Why did this turn on the torch?
.............................................................................................................
.............................................................................................................
1 mark
(ii)
The diagrams below show symbols for a battery, a bulb and a switch.
Connect the symbols to make a series circuit for the torch.
1 mark
Page 14 of 36
(b)
The drawings below show two other torches. In both torches, the bulbs will not light even
when Paul closes the switches.
Look carefully at the drawings.
(i)
Why is the circuit of torch A not complete?
.............................................................................................................
1 mark
(ii)
What could you do to torch B to get the bulb to light?
.............................................................................................................
1 mark
Page 15 of 36
(c)
When Paul bought his torch there was a paper strip between the contacts of the switch as
shown below.
Paul had to remove the paper strip before he could turn the torch on.
Give the reason for this.
.....................................................................................................................
.....................................................................................................................
1 mark
maximum 5 marks
Q11.
Alice connects four light bulbs for her model house, as shown. She puts the bulbs into the
holes in the back wall.
(a)
When Alice turns the switch on, the bulbs do not light up. The batteries are not flat. None
of the bulbs is broken.
Why do the bulbs not light up?
......................................................................................................................
1 mark
Page 16 of 36
(b)
Alice makes the circuit work. When she turns the switch on, the bulbs are not very bright.
What must Alice add to the circuit to make the bulbs brighter?
......................................................................................................................
1 mark
(c)
The four bulbs in the circuit are the same. Which statement is correct?
Tick the correct box.
Each bulb is the
same brightness.
Each bulb is a
different brightness.
The bulbs at the
top are brighter.
The bulbs at the
bottom are brighter.
1 mark
The diagrams show two ways to write the model house.
circuit 1
(d)
(i)
circuit 2
In circuit 1, bulb B breaks and goes out.
What happens to the other bulbs in this circuit?
.............................................................................................................
.............................................................................................................
1 mark
(ii)
In circuit 2, bulb C breaks and goes out.
What happens to the other bulbs in this circuit?
.............................................................................................................
.............................................................................................................
1 mark
Page 17 of 36
(e)
In circuit 2, Alice adds another switch so that she can turn bulb A off while the other bulbs
stay on.
Write the letter S on circuit 2 to show where Alice should add the switch.
1 mark
Maximum 6 marks
Q12.
The back window of this car contains a heating element.
The heating element is part of an electrical circuit connected to the battery of the car.
The diagrams below show two ways of connecting the circuit of a heating element.
(a)
Give the name of each type of circuit:
circuit A ...................................................................
circuit B ...................................................................
1 mark
Page 18 of 36
(b)
A wire gets broken at point X on circuit A and at point Y on circuit B.
When the switch is closed, how does the broken wire affect the heating
element in:
(i)
circuit A? ............................................................................................
...........................................................................................................
1 mark
(ii)
circuit B? .............................................................................................
.............................................................................................................
1 mark
(c)
In very cold weather, ice may form on the back window of the car.
When the heating element is switched on, the ice will disappear and the surface of the
window will become clear and dry.
(i)
Fill the gap below to show the energy transfer that takes place.
When the heater is switched on, ........................................ energy is transferred from
the wires to the ice.
1 mark
(ii)
As the window becomes clear and dry, physical changes take place in the ice.
Fill the gaps below to show the physical changes which take place.
from ............................. to ............................. to .............................
1 mark
Maximum 5 marks
Page 19 of 36
Q13.
The diagram shows two dodgem cars at a fairground. The circuit symbols for the motor
and pedal for each dodgem car are shown on the diagram.
(a)
Complete the following sentence.
Each dodgem car is connected to the power supply through the
......................................... which is in contact with the wire
mesh, and through the ......................................... which is
in contact with the metal floor.
1 mark
(b)
Dodgem cars are connected using parallel circuits.
Complete the circuit diagram below for the two dodgem cars.
Use two motor symbols,
, and two switch symbols,
.
The power supply for the circuit has been drawn for you.
2 marks
Page 20 of 36
(c)
Even when the power supply is switched on, the dodgem car will not move until the pedal
is pressed. Give the reason for this.
.....................................................................................................................
.....................................................................................................................
1 mark
(d)
A man looks after the dodgem cars during the rides.
Why does the man not get an electric shock as he walks across the metal floor?
.....................................................................................................................
.....................................................................................................................
1 mark
(e)
During one ride, the two dodgem cars are running. The pick-up wire on one car snaps off.
Describe how this affects:
(i)
the dodgem car with the broken pick-up wire;
.............................................................................................................
1 mark
(ii)
the other dodgem car.
.............................................................................................................
1 mark
Maximum 7 marks
Page 21 of 36
Q14.
Some pupils made an electric cell using two different metals and a lemon.
They put strips of copper and zinc into a lemon and connected them to the terminals of
an electric clock.
(a)
Look at the photograph.
What evidence is there that they have made an electric cell?
................................................................................................................
1 mark
(b)
The pupils had pieces of copper, zinc, iron and magnesium and some lemons.
They wanted to find out which pair of metals made the cell with the biggest
voltage.
What equipment should they use to measure the voltage of their cells?
................................................................................................................
1 mark
(c)
In their investigation they used different pairs of metals.
Give one factor that they should keep the same.
................................................................................................................
1 mark
Page 22 of 36
(d)
The pupils measured the voltage produced by different pairs of metals.
Their results are recorded below.
Which pair of metals made the cell with the biggest voltage?
..................................... and ..............................................
1 mark
(e)
Look at the results in the table above.
Why should the pupils not use pairs of the same type of metal for the clock?
................................................................................................................
................................................................................................................
1 mark
maximum 5 marks
Page 23 of 36
M1.
(a)
(i)
Light
accept ‘sunlight’
do not accept ‘Sun’
1 (L3)
(ii)
support
1 (L4)
(b)
no water
if more than one box is ticked, award no mark
1 (L4)
(c)
minerals
if more than one box is ticked, award no mark
1 (L3)
(d)
C
if more than one box is ticked, award no mark
1 (L4)
[5]
M2.
(a)
cell wall
answers may be in either order
1 (L6)
chloroplast
accept ‘vacuole’
do not accept ‘X’
1 (L6)
(b)
nucleus
do not accept ‘chromosomes’
1 (L6)
(c)
chloroplast
do not accept ‘chlorophyll’
1 (L6)
(d)
vacuole
accept ‘sap’
accept the correct label written within the
vacuole on the diagram or next to label X
1 (L6)
(e)
near the upper surface of a leaf
if more than one box is ticked, award no mark
1 (L6)
[6]
Page 24 of 36
M3.
(a)
(i)
chloroplast
1 (L6)
(ii)
chloroplast
answers may be in either order
1 (L6)
cell wall
accept ‘wall’
do not accept ‘vacuole’
1 (L6)
(b)
part of the cell
chloroplast
1 (L6)
nucleus
1 (L6)
cell wall
accept ‘wall’
1 (L6)
cell membrane
accept ‘membrane’
1 (L6)
[7]
M4.
(a)
A: membrane
1 (L6)
B: nucleus
1 (L6)
C: cytoplasm
1 (L6)
(b)
any two from
•
cell wall
•
chloroplasts
accept ‘chlorophyll’
•
large vacuole
accept ‘vacuole’’
accept ‘starch grain’
2 (L6)
[5]
Page 25 of 36
M5.
(a)
(i)
•
52
accept ‘40+12’
1 (L3)
(ii)
•
liquid into a solid
both states are required for the mark
1 (L3)
(b)
•
any one from
•
iron
•
steel
accept ‘cobalt’ or ‘nickel’
1 (L4)
(c)
(i)
•
N
S
both poles are required for the mark
1 (L3)
(ii)
•
it would be repelled
accept ‘pushed away’
accept ‘it would fall down or drop’
‘they would not attract’ is insufficient
1 (L4)
[5]
M6.
(a)
very high melting point
answers may be in either order
1 (L3)
good conductor of heat
do not accept ‘good conductor’
1 (L3)
(b)
(i)
good conductor of electricity
do not accept ‘good conductor’
1 (L3)
(ii)
can be compressed
1 (L4)
[4]
M7.
(a)
(i)
35
1 (L3)
(ii)
37°C
1 (L4)
Page 26 of 36
(iii)
any one from
•
less chance of micro-organisms being passed on or spread
•
glass could break
accept ‘less chance of germs being passed on’
accept ‘might pass on disease’
accept ‘a child might bite or swallow the thermometer’
if more than one box is ticked, award no mark
•
mercury or alcohol or liquid could spill
(if the glass thermometer broke)
•
mercury is poisonous
•
you could choke
1 (L3)
(b)
any one from
•
bacteria
•
fungi
•
protozoa
accept a named non-viral pathogenic
micro-organism such as ‘salmonella’
do not accept names of diseases
do not accept ‘germs’
1 (L4)
(c)
(i)
any one from
•
so that alcohol can be seen
accept ‘so you can see it’
•
alcohol is difficult to see
•
you cannot easily see a colourless liquid
accept ‘you cannot see a colourless liquid’
•
to make it easier to read the thermometer
accept ‘so you can read it’
1 (L4)
(ii)
•
gas
1 (L3)
•
liquid
1 (L4)
answers must be in the correct order
[7]
Page 27 of 36
M8.
(a)
(i)
any one from
•
they vibrate further
accept ‘they vibrate more or faster’
•
they move faster
accept ‘they go faster’
do not accept ‘they move about more’
or ‘they collide more’
1 (L6)
(ii)
it increases
accept ‘it gets bigger’ or ‘they move further apart’
1 (L6)
(b)
(i)
220
1 (L5)
(ii)
299.9
1 (L5)
[4]
M9.
(a)
(i)
•
(molecules) are far apart or not touching each other
accept ‘only gases can be compressed’
‘the gas can be compressed’ is insufficient
as it is given in the question
accept ‘they are randomly arranged’
1 (L7)
(ii)
•
there is only one type of molecule
or compound or substance
accept ‘there is one type of particle’
do not accept ‘there is only one type of atom or element’
1 (L7)
(b)
any one from
•
the space or distance between the molecules or particles is smaller
accept ‘the volume is less’
accept ‘atoms’ for ‘particles’
•
the particles or they are closer together
•
more particles are touching the sides
accept ‘particles hit the sides more often’
‘the particles are hitting the sides’ is insufficient
‘if the gas is compressed the pressure rises’ is insufficient
1 (L7)
Page 28 of 36
(c)
(i)
any one from
•
new or different compounds have formed
accept ‘they are now joined in threes’
accept ‘new combinations of particles or atoms’
•
there is more than one compound
accept ‘the compounds are different’
accept ‘there is no longer a pure substance’
1 (L7)
(ii)
any one from
•
the same number of atoms are present
accept ‘mass is conserved’
‘the mass stays the same’ is insufficient
•
nothing has been added to or lost
‘the same atoms are present’ is insufficient
‘nothing changed’ is insufficient
‘the amount of gas stays the same’ is insufficient
1 (L7)
(iii)
•
NO
accept ‘ON’
N2O
accept ‘ON2’
NO2
accept ‘O2N’
all three answers are required for the mark
1 (L7)
(iv)
•
nitrogen oxide
accept ‘nitrogen monoxide’
accept ‘nitric oxide’
1 (L7)
[7]
M10.
(a)
(i)
any one from
•
it let the current or electricity flow
•
current could flow through the bulb
•
it completed the circuit
accept ‘the contacts came together’
1 (L3)
Page 29 of 36
(ii)
all three components must be correctly connected in series
accept
a mark may be awarded for any correctly connected
circuit drawn with straight or curved wires
award a mark for a correct circuit diagram in which
the pupil has drawn the symbols instead of connecting
the printed symbols
1 (L3)
(b)
(i)
any one from
•
the bulb is broken or blown
•
the filament is broken
accept ‘the coil is broken’
the bulb is not connected properly’ is insufficient
1 (L3)
(ii)
turn one of the cells around
accept ‘turn a battery round’
accept ‘turn the battery’
accept ‘put the batteries in the right way’
‘turn the batteries round’ is insufficient
the mark may be awarded for a description of the fault
eg ‘both batteries are the same way up’
1 (L3)
Page 30 of 36
(c)
any one from
•
it stopped current from flowing
accept ‘to stop the batteries running down’
•
paper does not conduct or is an insulator
•
the circuit was broken or incomplete
accept ‘to stop the contacts coming together’
•
so that the circuit can be completed
1 (L3)
[5]
M11.
(a)
any one from
•
the circuit is not complete
accept ‘there is no circuit’
•
a wire is missing
•
two of the bulbs are not connected
accept ‘the bulbs are not connected’
do not accept ‘the switch might be broken’
or ‘there is a loose connection’
1 (L3)
(b)
another cell or battery
accept ‘put the bulbs in parallel’
or ‘make a parallel circuit’
or ‘use new batteries’
do not accept ‘use stronger batteries’
1 (L5)
(c)
Each bulb is the same brightness.
if more than one box is ticked, award no mark
1 (L4)
(d)
(i)
they go out
accept ‘they stop working’
do not accept ‘they get dimmer’
1 (L3)
(ii)
any one from
•
they stay on or stay the same
accept ‘they get brighter’
•
they do not go out
accept ‘only the broken bulb goes out’
•
nothing
1 (L4)
Page 31 of 36
(e)
a letter S drawn onto or close to the wire in the top part of the circuit
anywhere between the two junctions
accept an open switch symbol drawn onto the diagram
do not accept a letter S drawn mid-way between the top two wires
or at a junction between the top two wires as shown below
1 (L4)
[6]
M12.
(a) circuit A: series
circuit B: parallel
both answers are required for the mark
1 (L5)
(b)
(i)
the circuit or heating element will stop working
accept ‘it will not work’ or ‘it will be off’
accept ‘the whole circuit has no current through it’
accept ‘it becomes cooler’
do not accept ‘it breaks the heater or element or it’
1 (L5)
(ii)
any one from
•
the circuit or element will continue to work
•
one wire will not heat the window
accept ‘the bottom one has no current through it’
‘nothing’ or ‘it will not be affected’ are insufficient
accept ‘it will work less well’
accept ‘the bottom wire becomes cooler’
do not accept ‘it becomes cooler’
do not accept ‘it does not work properly’
1 (L5)
Page 32 of 36
(c)
(i)
thermal accept ‘heat’
1 (L5)
(ii)
from solid to liquid to gas
all three states are required for the mark
accept ‘from solid to liquid to vapour or steam’
accept ‘from ice to water to vapour or gas’
1 (L5)
[5]
M13.
(a)
pick-up wire
metal wheel
answers must be in the correct order
both answers are required for the mark
1 (L5)
(b)
One mark is for drawing the two motors connected in parallel.
One mark is for drawing one switch in series with each motor.
Both marks should only be awarded if the circuit is correct.
•
the switches may be drawn either side of the motors
2 (L5)
(c)
any one from
•
it completes the circuit
•
it acts as a switch
accept ‘because the circuit is not complete’
‘the pedal connects the motor’ is insufficient
accept ‘the pedal connects the motor to the power supply’
1 (L5)
(d)
any one from
•
he does not complete a circuit
accept ‘the circuit is not complete’
•
he does not connect the floor and wire mesh ceiling
accept ‘he is not touching the ceiling’
accept ‘he wears trainers’ or ‘he has rubber shoes’
1 (L5)
Page 33 of 36
(e)
(i)
it stops
1 (L6)
(ii)
it is not affected or it keeps going
accept ‘it goes slightly faster’
1 (L6)
[7]
M14.
(a)
any one from
•
the clock works
accept ‘when the light goes on’
‘it is making electricity’ is insufficient
•
the time on the clock
accept ‘it shows 12.30’
1 (L5)
(b)
•
voltmeter
‘multimeter’ is insufficient
1 (L6)
(c)
•
any one from
•
the fruit or lemon
do not accept ‘the acid’
•
condition of metal
accept ‘the size or surface area of the metal’
accept ‘the distance between them’
accept ‘the amount of metal’
•
temperature
accept ‘how far they push them in’
1 (L6)
(d)
•
copper and magnesium
accept ‘most reactive with least reactive’
1 (L5)
Page 34 of 36
(e)
any one from
•
no difference in reactivity
accept ‘there would be no reaction between them’
•
they produce zero voltage
accept ‘it would not work’
accept ‘there would be no difference’
1 (L6)
[5]
Page 35 of 36
Page 36 of 36