Key Stage 3 Science
Name:
Class:
Year 7
Easter revision BIOLOGY
Author:
Science Team
Date:
23/03/17
Time:
60 minutes
Marks:
60 marks
Comments:
Mark the test using the mark scheme and make a list of
topics that you have not performed well on.
Topics I need to improve on:
Q1.
Sally investigated how the human body digests and absorbs starch.
She used saliva to digest the starch.
To model digestion she used special bags made from a semi-permeable
membrane. These bags have lots of very small holes.
Sally sets up the equipment as shown below. There is one special bag in each
beaker.
She keeps the water in the beakers at 37ºC.
After 20 minutes, Sally tested the contents of each beaker and bag for starch
and sugar.
The table below shows Sally’s results.
Was starch
found in the
bag?
Was sugar found
in the bag?
Was starch
found in the
water?
Was sugar
found in the
water?
beaker A
beaker B
beaker C
(a)
Suggest why Sally kept the water at 37ºC.
......................................................................................................................
1 mark
(b)
(i)
Explain why sugar was found in the bag in beaker A.
.............................................................................................................
1 mark
(ii)
Starch was not found in the water outside the bag in any beaker.
Suggest why.
.............................................................................................................
1 mark
(c)
Why did Sally set up beaker C? Tick the correct box.
for a fair test
for accuracy
for reliability
for a control
1 mark
(d)
Sally used diagrams to show what happened in her investigation.
Use the diagrams above to answer the following questions.
(i)
Which diagram shows the results of beaker B? Write the letter.
......................
1 mark
(ii)
Which diagram shows the results of beaker A? Write the letter.
......................
1 mark
(e)
What does saliva contain that causes starch to change in beaker A?
......................................................................................................................
1 mark
(f)
Sally chewed a piece of bread for 5 minutes without swallowing.
What would she notice about the taste of the bread after chewing for 5
minutes?
Use Sally’s results to help you.
......................................................................................................................
1 mark
maximum 8 marks
Q2.
Table 1 gives information about 100 g of five different foods.
energy per
100 g
of food
(kJ)
protein
(g)
fat
(g)
carbohydrate
(g)
calcium
(mg)
banana
403
1.2
0.3
23.2
6
wholemeal
bread
914
9.2
2.5
41.6
54
butter
3031
0.5
81.7
0
15
cheese
1708
22.5
34.4
0.1
720
milk
275
3.2
3.9
4.8
115
food
nutrients per 100 g of each food
table 1
(a)
Look at table 1.
(i)
Which of the four nutrients, protein, fat, carbohydrate or calcium,
provides
most of the energy in the cheese?
..............................................................................................................
..
(ii)
Which of the four nutrients provides most of the energy in the
wholemeal
bread?
..............................................................................................................
..
(iii)
Which of the four nutrients is needed for growth and repair?
..............................................................................................................
..
3 marks
(b)
The recommended daily amount of protein for a woman is 45 g.
Look at table 1.
How many grams of cheese would provide 45 g of protein?
Tick the correct box.
50 g
100 g
150 g
200 g
1 mark
(c)
Not all the types of nutrients needed for a balanced diet are shown in table
1.
Give the name of one of the missing types of nutrient.
.............................................................
1 mark
(d)
Table 2 shows the recommended daily amount of calcium for a person in
four
stages of the human life cycle.
We need calcium for healthy teeth and bones.
person
recommended daily amount of
calcium (mg)
a baby aged 6 months
600
a woman before she is
pregnant
500
a pregnant woman
1200
a breast-feeding woman
table 2
(i)
Use information in table 2 to estimate how much calcium a breastfeeding
woman should have each day.
............. mg
(ii)
Explain why she would need this amount of calcium.
..............................................................................................................
..
..............................................................................................................
..
2 marks
maximum 7 marks
Q3.
The diagram below shows the digestive system.
(a)
(i)
Give the letter which labels the stomach.
............
1 mark
(ii)
Give the letter which labels the small intestine.
............
1 mark
(iii)
Glucose is absorbed in the small intestine.
What carries glucose from the intestine to other parts of the body?
.............................................................................................................
1 mark
(b)
Some athletes take glucose tablets before a race.
Why do they take glucose?
Tick the correct box.
for growth
for healthy bones and
teeth
to prevent disease
to provide
energy
1 mark
(c)
The table below shows what four people ate for lunch.
name
lunch
Jon
chicken and salad
Nadia
cheeseburger and chips
Clare
lemonade and a jam doughnut
Zak
mushroom soup and an orange
(i)
Whose lunch had the most sugar in it?
...........................................................
1 mark
(ii)
Whose lunch had the most fat in it?
...........................................................
1 mark
(iii)
Eating too much fat is bad for you.
Give one reason for this.
.............................................................................................................
.............................................................................................................
1 mark
maximum 7 marks
Q4.
(a)
(i)
The diagram shows a group of cells from the lining of the mouth.
Give the name and function of part P.
name of part P
.............................................................................................................
1 mark
function of part P
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Which word describes this group of cells?
Tick the correct box.
compound
organism
organ
tissue
1 mark
(b)
The diagram below shows muscle cells from the wall of the human
intestine.
(i)
Muscle cells can contract.
Give one reason why muscles are needed in the intestine.
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Other cells in the intestine produce enzymes.
What effect do enzymes in the intestine have on nutrients such as
protein?
.............................................................................................................
.............................................................................................................
1 mark
(iii)
Which of the following is required in the diet to keep food moving
through
the intestine?
Tick the correct box.
fat
fibre
protein
starch
1 mark
maximum 6 marks
Q5.
The drawing below shows the human rib cage.
(a)
The rib cage protects organs in the chest.
Give the names of two organs in the chest.
1. ................................................................
2. ................................................................
2 marks
(b)
The ribs are attached to the breast bone by cartilage which bends easily.
This lets the space in the chest get bigger.
Why is it important that the space can get bigger?
.......................................................................................................................
.
.......................................................................................................................
.
1 mark
(c)
The drawings below show parts of three different organ systems.
Draw a line from each organ system to its function.
Draw only three lines.
3 marks
maximum 6 marks
Q6.
(a) Carbon monoxide, nicotine and tar get into the lungs when a person
smokes.
Draw a line from each substance to the effect of the substance on the
body.
Draw only three lines.
3 marks
(b)
The coronary arteries carry blood to the heart muscle.
The drawing below shows the heart and coronary arteries.
(i)
Diagram 1 shows a section through a coronary artery.
diagram 1
Smoking can cause damage to the coronary artery.
Diagram 2 shows a section through part of a damaged artery.
diagram 2
not to scale
Look at diagram 2. A blood clot has formed.
Give one other change in the coronary artery.
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Respiration takes place in the muscle cells of the heart.
Explain why a blood clot in the coronary artery prevents these cells
respiring normally.
.............................................................................................................
.............................................................................................................
.............................................................................................................
.............................................................................................................
2 marks
maximum 6 marks
Q7.
The diagrams below show the male and female human reproductive
systems.
not to scale
(a)
The table below contains descriptions of parts of the human reproductive
system.
Complete the table to give the name of each part.
name of part
description
the tube that carries an egg to the uterus
the organ that produces sperm
he organ that produces the egg
3 marks
(b)
The diagram below shows an unborn baby.
Complete the sentences below by filling in the gaps.
In humans, normal pregnancy lasts for .................. months.
When the foetus is ready to be born, muscles in the uterus wall start
to ............................................. .
2 marks
After the baby is born, the .......................................................... connecting
the foetus to the mother is cut.
1 marks
maximum 6 marks
Q8.
(a) The average life span of a lion in a zoo is 22 years.
The average life span of a lion in the wild is 17 years.
Suggest two reasons why lions live longer in a zoo than in the wild.
1.
..............................................................................................................
......
2.
..............................................................................................................
......
1 mark
(b)
John found the following data about five mammals.
average length of
pregnancy (days)
average life span
(years)
mouse
20
2
guinea pig
65
7
leopard
96
15
chimpanzee
250
40
whale
315
50
mammal
He plotted points using data from the table.
(i)
Using the points John plotted, draw a line of best fit.
1 mark
(ii)
From the graph, describe the relationship between the average length
of
pregnancy and the average life span.
..............................................................................................................
.
..............................................................................................................
.
1 mark
(c)
John found data about three other mammals.
mammal
Human
average length of
pregnancy (days)
average life span
(years)
266
72
Horse
340
25
Giraffe
440
17
(i)
Plot these three points on the graph above.
2 marks
(ii)
Do these points fit the relationship you described in part (b) (ii)?
Tick the correct box.
yes
no
Use the graph to give a reason for your answer.
..............................................................................................................
.
..............................................................................................................
.
1 mark
maximum 6 marks
Q9.
The diagram shows a section through the human female reproductive
system.
(a)
(i)
How often are eggs normally released in the female reproductive
system?
.............................................................................................................
1 mark
(ii)
In which labelled part is an egg normally fertilised by a sperm?
..........................................
1 mark
(b)
Fill the two gaps in the sentences below.
A fertilised egg divides into a tiny ball of cells called an embryo.
The embryo attaches to the lining of the uterus. Here the embryo
grows to become an unborn baby, called a ...................................... .
It takes about ...................................... months for a baby to develop
inside its mother.
2 marks
(c)
The diagram below shows a baby growing in its mother’s uterus.
(i)
What is the function of the amniotic fluid?
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Through which part can harmful substances, such as nicotine, pass
from the mother’s blood to the baby’s blood?
.................................................
1 mark
(iii)
Give one other harmful substance which may be passed from the
mother’s blood to the baby’s blood.
............................................
1 mark
(d)
When the baby is born it is pushed out of the mother’s body.
What happens in the wall of the uterus to push the baby out?
.....................................................................................................................
.....................................................................................................................
1 mark
Maximum 8 marks
Mark Scheme
M1
(a)
•
(37 °C is) body temperature
accept ‘so the saliva or enzymes would work’
accept ‘it is a good or optimum temperature for
digestion’
‘to make it a fair test’ is insufficient
‘so they are all the same’ is insufficient
1 (L5)
(b)
(i)
•
the starch is broken down or digested
‘there is a reaction between starch and saliva’ is
insufficient
1 (L6)
(ii)
any one from
•
starch could not pass through the bag
accept ‘starch could not get through the holes’
‘the bag is semi-permeable’ is insufficient
•
starch is too big
‘the bag holds it in’ is insufficient
1 (L6)
(c)
•
for a control
if more than one box is ticked, award no mark
1 (L6)
(d)
(i)
•
P
if more than one letter is given, award no mark
1 (L6)
(ii)
•
R
if more than one letter is given, award no mark
1 (L6)
(e)
•
enzymes
accept ‘amylase’ or ‘carbohydrase’
1 (L6)
(f)
any one from
•
sweeter or sugary
accept ‘sugar’ or ‘sweet’
•
it tastes of sugar (L6)
1
[8]
M2.
(a)
(i)
•
fat
1 (L5)
(ii)
•
carbohydrate
1 (L5)
(iii)
•
protein
1 (L6)
(b)
any one from
•
200 g
if more than one box is ticked, award no mark
1 (L6)
(c)
any one from
•
vitamins
accept a named vitamin
•
water
•
fibre
accept ‘roughage’
accept ‘minerals’ or a named mineral
do not accept ‘calcium’
1 (L5)
(d)
(i)
•
1100
accept a number from 1000 to 1300
1 (L6)
(ii)
any one from
•
to make milk
•
milk contains calcium
•
a breast-fed baby needs calcium for growth or for bones
or teeth
accept ‘the baby needs calcium’
•
she has to have enough calcium for herself and the baby
accept ‘to feed herself and the baby’
accept ‘the baby needs 600 and she needs 500’
accept ‘this is recommended for mother and baby’
‘to feed the baby’ is insufficient
1 (L6)
[7]
M3.
(a)
(i)
D
1 (L3)
(ii)
E
1 (L3)
(iii)
any one from
•
blood
accept ‘plasma’
•
blood vessels
accept a named blood vessel
accept ‘arteries’; ‘veins’
a mark should be awarded for ‘red or white blood
cells’
as knowledge of the function of blood cells is not
expected
at this level the mark is awarded for the reference
to blood
1 (L4)
(b)
to provide energy
if more than one box is ticked, award no mark
1 (L3)
(c)
(i)
Clare
accept ‘lemonade and jam or doughnut’
1 (L3)
(ii)
Nadia
accept ‘cheeseburger and chips’ or ‘burger and
chips’
1 (L3)
(iii)
any one from
•
it causes heart disease
accept ‘it is bad for your heart’
•
it could give you a heart attack
accept ‘it might give you a stroke’
•
it clogs your arteries or blood vessels
accept ‘it makes you fat’
accept ‘it is bad for the liver’
1 (L3)
[7]
M4.
(a)
(i)
•
name: nucleus
1 (L6)
•
function: it controls the cell
accept ‘nuclei’; ‘it contains genetic information’;
‘contains chromosomes’
‘it is the brain of the cell’ is insufficient
1 (L6)
(ii)
tissue
if more than one box is ticked, award no mark
1 (L6)
(b)
(i)
any one from
•
to push food or waste along
accept ‘for peristalsis’
•
to break up large pieces of food
accept ‘mechanical digestion’
•
to churn food
accept ‘to mix in enzymes’
‘to digest food’ is insufficient
1 (L6)
(ii)
•
they speed up digestion
accept ‘they digest them’
accept ‘they break them down’
accept ‘they turn it into amino acids’
1 (L6)
(iii)
•
fibre
if more than one box is ticked, award no mark
1 (L5)
[6]
M5.
(a)
any two from
•
heart
•
lungs
•
windpipe or trachea
•
oesophagus or gullet
accept ‘blood vessels’ or ‘arteries’ or ‘veins’
do not accept ‘bronchiole’
2 (L3)
(b)
any one from
•
so the lungs can expand or get bigger
•
so we can breathe
•
so we can take in air or oxygen
accept ‘so the pressure drops’
references to growth are insufficient
1 (L4)
(c)
If more than one line is drawn from any organ
system
award no credit for that organ system
3 (L3)
[6]
M6.
(a)
if more than one line is drawn from any substance,
award no mark for that substance
3 (L5)
(b)
(i)
any one from
•
fat has been deposited
accept ‘fat’
•
the artery has become narrower
accept ‘it is blocked’
1 (L5)
(ii)
any two from
•
less oxygen to the cells or heart muscle
accept ‘no oxygen’
do not accept ‘less air to the cells’
•
less glucose to the cells or heart muscle
accept ‘no glucose’
•
less blood to the cells or heart muscle
accept ‘it stops the circulation of blood’
accept ‘blood cannot flow through’
accept ‘it stops blood getting to the heart’
‘nothing can get through’ is insufficient
accept ‘there is a build-up of carbon dioxide’
accept for two marks ‘they get less
oxygenated blood’
2 (L6)
[6]
M7.
(a)
part
•
oviduct
•
testes
•
ovary
description
accept ‘fallopian (tube)’ for oviduct
‘egg tube’ is insufficient
accept ‘testis’ or ‘testicle(s)’ for testes
do not accept ‘ovules’ for ovary
accept only the technical terms given
3 (L5)
(b)
•
9
accept ‘9 ½’
accept a number in the range of 37– 42 only if the
unit is changed to ‘weeks’
1 (L5)
•
contract
accept ‘contractions’
‘tense’ is insufficient
accept ‘contract and relax’
‘squeeze’ is insufficient
accept ‘(muscles) get shorter’
‘get smaller’ is insufficient as the volume of the
muscles does not change
1 (L5)
•
umbilical cord
accept ‘cord’ or ‘umbilical’
‘tube’ is insufficient
1 (L5)
[6]
M8.
(a)
any two from
both answers are required for the mark
•
less or no competition for food
•
plenty of food or water or they get fed
accept ‘good or balanced diet’
‘they are looked after’ is insufficient
•
they have shelter
accept ‘protected from bad weather’
‘protection’ is insufficient because it is not specific
•
veterinary or medical treatment
accept ‘they are vaccinated’
‘they get fewer diseases’ is insufficient
do not accept ‘they are less likely to get a disease’
accept ‘they are kept healthier’
‘they are healthier’ is insufficient
•
they are less likely to be injured or killed or there is no hunting of lions
accept ‘they do not fight as much’
accept ‘there are no predators of lions’
1 (L5)
(b)
(i)
•
an appropriate line of best fit
accept a curved or straight line
1 (L6)
(ii)
any one from
•
animals with longer pregnancies live longer
•
the shorter the pregnancy the shorter the life span
accept ‘the shorter the life span the shorter the
pregnancy’
a comparative answer is required
1 (L5)
(c)
(i)
•
all three points plotted correctly
accept a tolerance of ± half a small square
if all three points are correct, award two marks
if one or two points are correct, award one mark
2 (L5)
(ii)
•
no
if more than one box is ticked, award no mark
both the answer and the correct explanation
are required for the mark
any one from
•
the data is more scattered
accept ‘they do not go up in a straight line’
•
there is no link between the number of days pregnant
and the expected life span
accept ‘they do not fit the line of best fit’
•
the human has the longest life span but the shortest pregnancy
•
the giraffe has the shortest life span but the longest pregnancy
accept ‘giraffes or horses have a longer pregnancy
than humans but a shorter life span’
•
the (new) points show the longer the pregnancy the
shorter the life span
accept the converse
accept ‘they are opposite to the other results’
1 (L6)
[6]
M9.
(a)
(i)
•
any one from
every month or once a month
•
every four weeks
•
every 28 days
accept answers from 26 days to 30 days
1 (L5)
(ii)
oviduct or fallopian tube
1 (L6)
(b)
foetus
1 (L5)
9
answers must be in the correct order
1 (L5)
(c)
(i)
any one from
•
it cushions the baby
•
it protects the baby against shocks or bumps
accept ‘it protects the baby’
•
it absorbs shocks
do not accept ‘keeps it warm’ or ‘keeps it moist’
1 (L6)
(ii)
placenta
1 (L5)
(iii)
alcohol
accept ‘drugs’ or a named drug
accept a named toxin
accept ‘viruses’ or a named virus or a named viral
disease
1 (L5)
(d)
muscles contract
accept ‘contractions’
1 (L6)
[8]