Name:…………………………………………………………………………………….
Teacher: MS SOUTHERN / MR PAROUSIS /MR KWONG / MR HENSTOCK
Wiley Park Girls High School
Year 8
SCIENCE
2019
Yearly Examination
General Instructions
 Reading time – 5 minutes
 Working time – 50 minutes
 Write using black or blue pen
 Draw diagrams and graphs using pencil and
ruler
 Write your name and class at the top of this
page
Verbs
Identify: Recognise and Name
Describe: Provide characteristics and features
Explain Relate cause and effect; provide why and/or how
Outline: Sketch in general terms; indicate the main features of
Total marks for this assessment:
47 marks
Section I
Part A
Multiple Choice: 20 Marks
Section II
Section B
Short Answer and Data Processing:
21 Marks
Section C
Long Response: 6 Marks
1
Section I
Allow about 20 minutes for this section
Part A – 20 marks
Attempt Questions 1–20
Select the alternative A, B, C or D that best answers the question and indicate your choice with a cross (X)
in the appropriate space on the grid below.
A
B
C
D
A
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9
19
10
20
B
C
D
2
Section I
PART A: MULTIPLE CHOICE (20 marks)
Use the multiple-choice answer sheet to answer the multiple- choice questions
1. Which of the following statements lists components of animal bodies in order of increasing complexity?
a) System, organ, tissue, cell
b) Organ, system, tissue, cell
c) Tissue, cell, organ, system
d) Cell, tissue, organ, system
2. This question refers to the figure on the right. Which part of your body “acts like a sac by sorting and
stretching to store more food. Proteins are digested here as food is mixed with gastric juices”.
a) P - Mouth
b) Q - Oesophagus
c) R - Stomach
d) S - Large Intestine
3. Most water enters the plant through the…..?
a) Flowers
b) Leaves
c) Stem
d) Roots
3
4. The diagram shows a detailed part of a lung in the human body.
This part could be said to belong to two systems in the human body.
What are the names of the two systems?
a)
Respiratory and circulatory systems
b)
Reproductive and excretory systems
c)
Respiratory and digestive systems
d)
Reproductive and urinary systems
5. Where would you find the MOST reactive metal in the periodic table labelled below?
a) A
b) F
c) H
d) I
4
6. The diagram shows the human heart.
A
C
B
D
Which labelled part of this diagram is the Left Ventricle?
a)
A
b)
B
c)
C
d)
D
7. Which of the following would occur as a result of plants making their own food?
a) Oxygen is returned to the air
b) Water is taken in by the leaves
c) Sunlight is made into sugar
d) Leaf colour changes from green to yellow
5
8. The graph shows the composition of four common foods.
Approximately what percentage of cheese is water?
a) 43%
b) 70%
c) 69%
d) 32%
9. All matter falls into one of three categories: elements, compounds or mixtures.
Each diagram represents the particles found in matter inside each of the containers.
Which statement is true?
a) An element and a compound have a fixed composition
b) A mixture and a compound have a fixed composition
c) A compound is always a mixture
d) A mixture is always a compound
6
10. One serving of food is the amount of food that an average person would normally eat in one meal.
By measuring food in servings, it is possible to compare the energy content (kJ) in foods.
The graph shows the energy content in one serving of some food items in 1982 and 2002.
Which food item had the greatest percentage increase in energy content per serving in 2002 compared
with 1982?
a) Pepperoni pizza
b) Chicken Caesar salad
c)
Large popcorn
d)
Soft drink
11. Which choice contains only elements that are metals?
a)
Carbon, lead, tin, sulfur
b)
Tin, copper, aluminium, zinc
c)
Helium, copper, iron, nitrogen
d)
Lead, sodium, iron, hydrogen
7
12. Metals look shiny, conduct electricity and they bend when hit with a hammer. Non-metals are the
opposite of metals. Look at the information for some chemicals P to T.
Chemical
Appearance
Conducts electricity
Result when hit
with a hammer
Element 1
Dull
No
Shatters
Element 2
Shiny
Yes
Bends
Element 3
Dull
No
Shatters
Element 4
Shiny
Yes
Bends
Element 5
Shiny
Yes
bends
From this table we can say that …
a) Elements 1 & 5 are metals
b) Elements 1 & 3 are non-metals
c) Elements 2 & 4 are non-metals
d) Elements 1 & 4 are metals
13. The symbol for sodium is?
a)
b)
c)
d)
So
N
Na
S
8
14. The glycaemic index (GI) of foods is a measure of the effect that different foods have on blood
glucose (sugar) levels. Glucose is the body’s main source of energy.
The graph represent the blood glucose levels after consuming a high GI food and after consuming a
low GI food.
Which statement is supported by the data shown in the graph?
a) Low GI foods are broken down quickly.
b) High GI foods provide a quick energy boost.
c) Foods with a low GI cause a large and fast rise and fall in blood glucose.
d) Foods with a high GI cause a more steady and long-lasting rise and fall in blood glucose levels.
9
15. The tables list the top five diseases that cause death in low-income countries and in high countries.
How many diseases are among the top five causes of death for both low-income and high-income
countries?
a) 1
b) 2
c) 4
d) 8
16. Identify which of the following groups of substances are all good conductors of electricity.
a) Leather, wood, glass
b) Copper, zinc, aluminium
c) Saltwater, sulfur, copper
d) Silver, gold, glass
10
17. The diagram represents the water cycle.
Choose the options which best match the terms to the labels.
W
X
X
Y
Z
Which choice correctly identifies the labels W, X, Y and Z?
W
X
Y
Z
a) Transpiration
Condensation
Evaporation
Precipitation
b) Condensation
Evaporation
Precipitation
Ground water
Evaporation
Precipitation
Condensation
Ground water
d) Precipitation
Evaporation
Ground water
Transpiration
c)
11
18. The table lists some of the components in 100 grams (g) of the milk that some mammals produce.
How many grams of protein are there in 200g of goat milk?
a) 3.1.
b) 3.3
c) 6.2.
d) 6.6
19. Why do we put our food in a fridge?
a) It kills the bacteria on the food
b) It causes the bacteria to move off the food
c)
It keeps the food crisp
d) It slows down the growth rate of bacteria
12
20. Sankey diagrams show how quantities are distributed as a result of a process.
These Sankey diagrams show the blood flow (L/min) through the body when a person is resting and after
the person has eaten.
Which part of the body receives less blood after eating than when resting?
a) Heart
b) Brain
c) Muscle
d) Skin
13
Section II
PART B: SHORT ANSWER
Question 21 (7 marks)
Marks
The table shows the results of an experiment. A student heated two containers of milk using two different
energy sources. One with an electric stove and one with a gas stove.
Time (s)
Temp of milk using electric stove (°C)
Temp of milk using gas stove(°C)
(a)
0
10
10
20
12
20
40
20
22
60
22
34
80
28
40
100
30
48
120
34
52
Graph the results for each container in the space below.
4
(b)
What was the variable being tested in this experiment?
1
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(c)
What was done to ensure that this was a “fair” experiment?
1
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(d)
Write a conclusion for this experiment.
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1
14
Question 22 (4 marks)
Marks
Explain TWO ways in which human activity impacts on the water cycle.
4
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Question 23 (3 marks)
Air is breathed in by the respiratory system. Within the lungs, exchange of gases takes place and the air
that is breathed out has a different composition.
Gas
Nitrogen
Oxygen
Inert gases such as argon
Carbon dioxide
Water vapour
Percentage (%)
Inhaled Air
Exhaled Air
78
78
21
17
1
1
0.04
4
little
Saturated
a) List the gases that are present in the same quantities in inhaled and exhaled air.
1
……………………………………………………………………………………………………
b) Explain why the quantities of oxygen and carbon dioxide change.
2
……………………………………………………………………………………………………
……………………………………………………………………………………………………
15
Question 24
The diagram is a drawing of a plate drawn to a scale of 1:10 (1 cm represents 10 cm).
What is the best estimate of the magnitude (size) of the diameter of the plate?
1
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Question 25
The pie chart shows the composition of blood:
What is the approximate percentage of red blood cells in blood?
1
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16
Question 26 (5 marks)
Modern society uses more than 60 metals that are extracted from the earth and used. Each metal has its
own properties which include strength, hardness, conduction of electricity and heat, resistance to corrosion,
density and chemical activity. Some metals are used more than others. This depends on the properties of
the metal and how much it costs. The cost depends on how abundant the metal is and how easily we can
mine and refine ore. The more chemically active a metal is, the faster it will corrode (rust) and the harder it
is to extract from its ore.
The table shows data about some metals.
Metal
Atomic symbol
Aluminium
Iron
Copper
Silver
Gold
Al
Fe
Cu
Ag
Au
World
Production
(Thousands
of tonnes
per year)
15 700
750 000
12 000
10
2
Density
(g ml-1)
2.7
7.9
8.9
10.5
19.3
Chemical
Activity
Most Active
Least Active
Estimated time
known reserves
will last(Years)
260
200
40
150
25
(a) Ignoring cost and using the information provided:
(i)
Identify a disadvantage of making cars out of gold
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(ii)
Explain an advantage of making cars out of gold.
2
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(b) Aluminium is one of the most abundant metals in the Earth’s crust. Despite its abundance, aluminium
is one of the more expensive to obtain. Using the information provided, explain a reason for this.
2
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17
Section II
Part C Long Response – Troubled Waters (6 marks) 10 minutes
Watch the clip that your teacher will show on the screen
https://www.youtube.com/watch?v=ryIadGeJ7O8
Denise and David measured the amount of dissolved oxygen in parts.
They constructed this graph of their results.
Describe the trend shown in the students’ results
How would a scientist explain the impacts of changing water temperature on a river and its
organisms?
18