Alva Academy
S2 Science Homework Booklet
Remember: if you have problems with the
homework, ask your teacher for help before
the day the homework is due.
Biology 3 – Cells, Reproduction and Inheritance
Homework 1
1. An animal cell was observed under a microscope at X40
magnification. The cell measured 1.2mm in length. What
was the actual size of the cell in mm?
2. What is the cell size in µm?
3. A plant cell was measured at 90µm in length and an animal
cell was measured at 30µm in length. How many times
bigger was the plant cell compared to the animal cell?
4. Draw a diagram of a plant cell and label the
following structures:
Nucleus
Chloroplast
Cytoplasm
Cell membrane
Cell wall
Vacuole
5. Name one structure found in both, animal and plant cells.
6. Which part of the cell is only found in bacterial cells?
7. Choose one of the specialised cells below, draw it and
describe 1 feature that makes it good at its job.
Red blood cell
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Root hair cell
Nerve cell
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Biology 3 – Cells, Reproduction and Inheritance
Homework 2
1.
Copy and complete the following table showing the parts
and functions of the male reproductive system.
Part
Function
Testes
(a)
Sperm Tube
Carries sperm from the testes
to the penis
(b)
Places sperm in the vagina
2. What is the joining together of the sperm with an egg cell
called?
3. Label structures a,b,c and d in the diagram below.
b
a
c
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d
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4. Heather and Janet were born on the same day at the
same hospital. Nurses measured their masses up to the
age of two years. These measurements are recorded in
the table below.
Age
(months)
0
4
8
12
16
20
24
Heather's Mass
(kg)
4.5
8.0
10.5
12.5
13.5
14.5
15.0
Janet's Mass
(kg)
3.5
6.5
8.5
10.0
10.5
11.5
12.5
a) Which baby was lighter at birth?
b) Draw a line graph, on graph paper, to show how Heather's
mass has changed with age.
c) From your graph answer the following questions.
(i) How old was Heather when her mass was 13kg?
(ii) What was Heather's mass when she was 3 months old?
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Biology 3 – Cells, Reproduction and Inheritance
Homework 3
1. Copy and complete the sentence below.
DNA is found on
of cells.
chromosomes
proteins
It contains regions called
body how to make
in the
genes
proteins
genes
proteins
chromosomes
nucleus
that tell your
.
2. The following cross shows how horns are inherited
from parents to offspring in cows. Both parents have 2
of the same genes.
(a)
(b)
Which trait is dominant?
How do you know?
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3. Use the ‘Invertebrate Key’ to answer the following
questions.
a) Which organism in the key has only one body part?
b) Write down all the statements from the key which would
describe a Centipede
c) What is the difference between a Millipede and a
Centipede?
d) Describe two differences between a Slug and a Spider.
4. Describe 1 use of DNA profiling and state an advantage
and disadvantage of this use.
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Chemistry 3 – Chemistry at Home
Homework 1
1.
Jack was given a solution and asked to find out the pH
number and the type of solution. Describe the experiment
Jack should do.
2. Mr Gardener has a vegetable plot that measures 8m by
5m that has a pH of 5. Mr Gardener wants to grow
cabbages but these grow best if the pH of the soil is 6.5.
Mr Gardener decides to add a white solid to raise the pH.
150g of the white solid will raise the pH of 1 m2 by 0.5.
a)
b)
c)
d)
Calculate the area of the vegetable plot.
Calculate by how much the pH has to rise.
Name the white solid that Mr Gardener added.
Calculate how much of the white solid Mr Gardener
must add.
3. Explain what we mean by ‘neutralisation’.
4. Mrs Gardener spilt bleach on the kitchen floor and
wanted to clean it up safely.
a) What type of solution is bleach
b) What substance found in a kitchen could Mrs Gardener
add to the spilt bleach to neutralise it.
c) What would happen to the pH number as Mrs Gardener
neutralised the bleach?
d) What would the pH be once all the bleach had been
neutralised?
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Chemistry 3 – Chemistry at Home
Homework 2
1.
Each of the following experiments were set up to
investigate the rate of reaction of four metals, W, X, Y
and Z, with dilute hydrochloric acid.
W
X
Y
Z
a) Place the four metals in order of reactivity. Start
with the most reactive.
b) State three factors that must be kept the same for
the comparison to be a fair one.
2. In modern society we use lots of different alloys.
a) What is an alloy?
b) Name an alloy and give a use of that alloy.
c) Explain, in terms of the property of the alloy, why it is
suitable for that use.
3. An alloy is made from 85% iron and 15% chromium. What
mass of iron would you require to make 250g of the alloy.
4. A metal was discovered in 1962. What does this tell you
about the reactivity of the metal?
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5. Below are the properties of five alloys, A, B, C, D and E
and a list of 5 uses alloys, 1, 2, 3, 4, and 5. Match the alloy
to the use.
Properties
A – Very resistant to acid.
B – Low melting point and a good electrical conductor.
C – Light and very resistant to salt water.
D – Can be mixed cold and sets hard in 24 hours.
E – Not affected by corrosion even at high temperatures.
Uses
1 - Making jet engines
2 - Making the upper decks of ships
3 - Making fillings for teeth
4 - Making connections between electrical wires
5 - Making reaction vessels for use in the chemical
industry.
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Chemistry 3 – Chemistry at Home
Homework 3
1.
Below is a diagram of a simple cell.
V
A
B
C
D
E
a) Write the label that should be at each of the points
‘A’ to ‘E’.
b) How could D be changed so that the voltage of the
cell was zero?
c) List three other factors that could be changed to
change the voltage.
2. Below is the method for an experiment.
50cm3 of sodium chloride was measured into a beaker
using the markings on the side of the beaker. A strip of
zinc and a strip of copper that was the same size were put
into the sodium chloride. A wire was attached to each
strip of metal using a crocodile clip. The other end of the
wire was plugged into a voltmeter and the voltage was
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recorded. More sodium chloride was added until the level
reached the 100cm3 mark on the beaker and the voltage
was recorded.
State two improvements that could be made to this
experiment and explain why they would have made the
experiment more reliable.
3. Below is an electrochemical series.
Metal
Magnesium
Aluminium
Zinc
Iron
Nickel
Tin
Copper
Voltage (V)
−2.37
−1.66
−0.76
−0.45
−0.26
−0.14
+0.34
a) State the two metals that would give the cell with the
highest voltage.
b) State the two metals that would give a cell with the
lowest voltage.
c) Which two metals, when used to make a simple cell,
would give a voltage of 0.48V?
d) Calculate the voltage of a cell that has an aluminium
electrode and a tin electrode.
e) In the previous cell, which direction would the
electrons flow, from the aluminium to the tin or from
the tin to the aluminium.
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Physics 3 – Energy Matters
Homework 1
In preparation for future lessons, you will now research 2 out
the 4 renewable energy sources listed below;



Biomass
Geothermal
Tidal
 Wave
Remember, only choose 2.
Your research is open-ended, but you need to include the
following;


How does it work?
Where are the best places to build the power station?

What are the advantages of using this type of

renewable energy?
What are the disadvantages of using this type of
renewable energy?
You should try to expand your research by adding other
relevant information.
You can use textbooks, newspaper articles, the internet and
information from other subjects in school.
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Physics 3 – Energy Matters
Homework 2
1. For the following household appliances, calculate the
energy wasted;
Appliance
Energy In
(J)
Energy Out
(J)
Hairdryer
1250
875
Kettle
Vacuum
cleaner
1100
825
700
560
Television
250
225
Energy
Wasted (J)
2. Explain why improving the efficiency of systems is
important. In your answer, you should include examples
of ways to improve efficiency.
3. From question 1, calculate the efficiency of each of the
appliances. You should show your working for each
calculation.
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Physics 3 – Energy Matters
Homework 3
Five colourful people live in one row of houses in a quiet cul-de
sac. You need to work out which person lives in each house and
what they pay each year for their fuel.
ANNUAL FUEL
COSTS
OWNER

10
Mrs Brown
Mr Grey
Miss Scarlett
Mrs White
Captain Black
£625
£743
£820
£857
£1,240
Captain Black, at one end of the row, pays the
average of the street for his fuel.

Ms Scarlett thinks insulating her house is not cost
effective and has the highest bill.
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£1,240
8
£857
6
£820
4
£743
2
£625
HOUSE NUMBER
ANNUAL FUEL
COSTS

Mr Grey, at number 4, spends much of his time away
from home and doesn't leave his heating on, so his
energy bill is the lowest. His next door neighbour
pays most for their fuel.

When it snows the snow remains on houses 4 & 6 but
not 2, 8 or 10.

Mrs Brown has the best insulated house and the
second lowest fuel bill. She lives next door to two
people with lower than average bills.

Mrs White has double glazing, cavity wall insulation
but not much loft insulation so snow melts when it
lands on her roof.
Copy and complete this summary
HOUSE
NUMBER
Who lives
there?
How much is
their annual fuel
costs?
2
4
6
8
10
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Biology 4 – Body Systems and Digestion
Homework 1
1. Name the parts of the heart labelled below:
C
A
B
D
2. Explain why the muscle on the left side of the
heart is thicker than the right side. Nn
3. Copy and complete the following table:
Blood Vessel Function
Structure
Carry blood away
from the heart
Vein
Thin outer wall
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Biology 4 – Body Systems and Digestion
Homework 2
1. Name the four different types of teeth
labelled on the diagram below:
A
B
C
D
2. Describe the function of the molars.
3. Name the parts of the tooth shown below:
A
B
C
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4. A group of pupils counted the number of teeth
present in their mouth. The results are shown
below. Calculate the average number of teeth
for this group of pupils.
Name of pupils
Number of teeth
Stuart
32
Laura
29
Emma
30
Jessica
24
Colin
20
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Biology 4 – Body Systems and Digestion
Homework 3
1. Using the letters from the diagram below
identify the following parts of the digestive
system:
a) Oesophagus
b) Large Intestine
c) Stomach
A
B
C
D
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2. Name the process that causes food to move
along the digestive system.
3. Describe what happens to food in the following
parts of the digestive system:
a) Mouth
b) Stomach
4. The table below shows the protein content of
different foods.
a) Convert the table below into a graph.
Type of food
Boiled egg
White bread
Beef
Milk
Protein Content (g per 100g)
13.1
8.9
24.5
3.4
b) State white food has the highest protein
content.
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Chemistry 4 – Nature’s Chemistry
Homework 1
1. Petrol is an important fuel. The combustion of petrol is
an example of an exothermic reaction.
Explain what is meant by each of the terms underlined.
2. Many fuels are obtained from crude oil.
a) Describe how crude oil is formed.
b) Explain why crude oil can be described as a fossil
fuel.
c) Explain why crude oil can be described as a finite
resource.
d) Name two other fossil fuels.
3. Paraffin (a hydrocarbon) is burned in lamps to provide
us with light and heat.
a) Which gas is used up when paraffin burns?
b) What are the two products when paraffin burns in
plenty of air?
c) Explain why it is dangerous to burn paraffin in a
poorly ventilated room.
d) What is the term used to describe the type of
combustion described in question b?
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4. Burning petrol can cause pollution problems.
a) What is fitted to a car to reduce the amount of
pollutant gases?
b) Name two pollutant gases which can be found in car
exhaust fumes and how they are produced.
c) Environmental problems are associated with burning
fossil fuels. Describe one of these problems and
name the pollutant responsible for the effect.
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Chemistry 4 – Nature’s Chemistry
Homework 2
1. Crude oil is a mixture of chemical compounds. Before
the compounds can be used, the crude oil must be
separated into fractions, fractional distillation.
a) Name the kind of compounds found in crude oil.
b) Explain what is meant by fractional distillation.
c) What is a fraction?
2. The fractions of crude oil have many uses. Give a use
for the following products;
a) Petrol
d) Kerosene
b) Diesel
c) Gas
e) Bitumen
3. What is the meaning of viscous?
4. What is the meaning of flammable?
5. Consider the following substances obtained from oil:
Petrol, diesel, gas, kerosene, bitumen
a) Name the substance that is the most viscous.
b) Name the substance that is the most flammable.
6. The Carbon Cycle shows the movement of carbon on
earth. Produce a poster which shows the important
processes involved in this movement.
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Chemistry 4 – Nature’s Chemistry
Homework 3
1. Nylon is a synthetic fibre; wool is a natural fibre.
a) Explain the difference between a natural and a
synthetic fibre.
b) What is the raw material from which most
synthetic fibres are made?
c) State a use of nylon and state what property makes
it suitable for this use.
d) State an advantage of a synthetic fibre against a
natural fibre.
2. The following is a list of plastics:
Poly(styrene), poly(ethene), poly(vinylchloride),
Perspex, Bakelite.
a) Copy and complete the following table by matching
each plastic with the appropriate use.
b)
Plastic
Uses
Electric plugs and sockets
Safety screens and spectacles
Packaging and ceiling tiles
Bin liners and washing-up bowls
Window frames and waterproof
clothing
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3. Thermosetting plastics have different properties from
thermosoftening plastics.
a) Explain what is meant by a thermosetting plastic
and give an example of one.
b) Explain what is meant by a thermosoftening plastic
and give an example of one.
4. Poly(ethene) is a widely used polymer.
a) Name the chemical reaction used to produce a
polymer.
b) Name the monomer used to produce poly(ethene).
5. Explain why disposing of plastics can be a problem.
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