2015

Year 9 Yearly Examination

Science

General Instructions

For multiple choice items, choose the response that you think is best and colour the 'bubble' on the answer sheet provided at the back of this booklet.

Write extended response answers in the space provided. Write using a black or blue pen A calculator may be used Time allowed: 1 hour

Knowledge and Understanding: 18 multiple choice questions 18 marksCritical Thinking: 6 extended response questions 52 marksTotal marks: 70

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Outcomes

SC5-12ES - Describes changing ideas about the structure of the Earth and the universe to illustrate how models, theories and laws are refined over time.

SC5-ES2 – The theory of plate tectonics explains global patterns of geological activity and continental movement.

SC5-WS7 Processing and analysing data and information: processes, analyses and evaluates data from first-hand investigations and secondary sources to develop evidence based arguments and conclusions.

SC5-11PW – Explains how scientific understanding about energy conservation, transfers and transformations is applied in systems.

SC5-PW3 - Scientific understanding of current electricity has resulted in technological developments designed to improve the efficiency in generation and use of electricity.

SC5-15W – Analyses interactions between components and processes within biological systems SC5-LW1 – Multicellular organisms rely on coordinated and interdependent internal systems to respond to

changes in the environment. SC5-PW1 – Energy transfer through different mediums can be explained using wave and particle models. SC5-10PW – Applies models, theories and laws to explain situations involving energy, force and motion.

Student name:________________________

Teacher/Class:________________________

MULTIPLE CHOICE: 1 mark each

Use the multiple choice answer sheet at the back of the examination tear it off and put your name on it

Question 1

Lenses are used in:(A) microscopes, telescopes and binoculars.

(B) telescopes, cameras and hand lenses.

(C) binoculars, cameras and microscopes.

(D) all of the above.

Question 2

A disease that can be caught from another living creature is described as:(A) congenital

(B) infectious

(C) chronic

(D) widespread

Question 3

Which one of the following is an example of a non-infectious disease?(A) Lung cancer

(B) Ross River fever

(C) Influenza

(D) Smallpox

Question 4

A pathogen:(A) cures a disease.

(B) prevents a disease.

(C) causes a disease.

(D) is a sick person.

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Question 5

The central nervous system is made up of:(A) the brain and the spinal cord.

(B) the brain.

(C) neurones.

(D) glands and nerve cells.

Question 6

Anything that provokes a response from the body is called:(A) an impulse.

(B) a response.

(C) a stimulus.

(D) sensation

Question 7

The diagram shows the parts of a neurone. This cell is composed of a cell body containing a nucleus and a long, thin fibre called an axon, along which an electrical signal travels. The axon is insulated by a myelin sheath.

The part labelled ‘10’ is the:(A) axon.

(B) cell body.

(C) myelin sheath.

(D) nucleus.

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Question 8

One major advantage of nuclear energy over conventional sources of energy (e.g. coal and oil) is that:(A) it does not produce the ‘greenhouse’ gases that coal and oil do.

(B) it is the safest form of energy to produce.

(C) nuclear energy is much cheaper to produce than energy from conventional sources.

(D) there are virtually no waste products for disposal.

Question 9

One of the great things that has resulted from nuclear energy science is the production of radioactive ‘isotopes’. Radioactive isotopes of an element are:(A) atoms of the element which always have equal numbers of protons and neutrons.

(B) different forms of the common atoms of the element which give out nuclear radiations.

(C) atoms of the element which are no different to the normal atoms but which possess more energy.

(D) able to be used only in medical situations.

Question 10

Hormones:(A) are produced by glands.

(B) travel in the bloodstream.

(C) are chemicals.

(D) are all of the above.

Question 11

Hormones differ from nerve impulses in that hormones:(A) travel along nerve cells.

(B) cause slower reactions than nerve cells.

(C) cause quicker reactions than nerve impulses.

(D) are electrical impulses.

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Question 12

The particles which make up atoms are:

(A) protons which have a positive charge, electrons which also have a positive charge and neutrons which have no charge.

(B) protons which have a positive charge, electrons which have a negative charge and

neutrons which also have a negative charge.

(C) protons which have no charge, electrons which have a negative charge and neutrons which have a positive charge.

(D) protons which have a positive charge, electrons which have a negative charge and neutrons which have no charge.

Question 13

Ultrasonic waves in the form of ‘sonar’ devices are used by geologists and fishers to survey the ocean floor and to find schools of fish. A ship sends a signal downwards and detectors on the ship sense when the signal is received at the ship. This could only happen if:

(A) the sonar waves can penetrate water and can be reflected.

(B) the sonar waves have the same intensity as those used in medicine.

(C) the sonar waves are only reflected by rocks and fish.

(D) sonar waves are absorbed by water.

Question 14

Some types of waves are known to be very penetrating. Of the following pairs, which are the most penetrating?(A) light and sound waves.

(B) radio and infra-red waves.

(C) X-rays and gamma rays.

(D) TV and ultraviolet.

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Question 15

Shown below are four outputs from a seismograph.

Which statement about these outputs is correct?

(A) The movement shown on graph E lasted for two minutes and is the strongest.

(B) The movement shown on graph E lasted for three minutes and is the weakest.

(C) The movement shown on graph F lasted for eight minutes and is the strongest.

(D) The movement shown on graph H lasted for one minute and is the weakest.

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Question 16

The teacher places a microphone near the pupil as she plays her flute. The diagram below shows the pattern on an oscilloscope screen.

The pupil then plays her flute at a higher pitch and more quietly.Which diagram below shows the pattern that would be seen on the oscilloscope?

Question 17

When astronauts on the Moon talk to one another, the sound waves that their voices make can’t travel to the other astronaut directly. This is because:(A) their sounds are stopped by the visors in their helmets.

(B) their spacesuits are made of a material which stops sounds for safety reasons.

(C) the pressure inside their spacesuits is too high for sound to be transmitted.

(D) there is no substance between their two spacesuits to transmit the sound.

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Question 18

The table shows the results of measurements of the speed of sound waves in different substances, and the densities of those substances. The values in the table are approximate only.

Substance Air Water Iron Granite rock

Density 0.0013 1.00 7.80 2.6

Speed of sound 330 1410 5130 6000

Based on the information in the table, which of the following statements is FALSE?

(A) Sound travels faster in water than in air.

(B) The speed of sound through a substance increases with the density of the substance.

(C) Sound appears to travel faster in solids than in liquids or gases.

(D) The speed of sound in granite is greater than in the other substances

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End of Multiple Choice

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Section B EXTENDED RESPONSE

Question 19 WOODLAND BIRDS

A year 9 class wants to see if there is a relationship between the level of light and the level of sound in their school grounds. Throughout one day in spring, they use a light sensor to record changes in light levels. On the same day, they use a sound sensor to record sound levels. Birds singing make most of the sounds.

The class draws this graph to show their results.

Use the graph to answer the following questions:

(a) The birds start singing at 4a.m. At what time is the birdsong the loudest?

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(b) Between what times on the graph is the light level highest?

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(c) The students think that increasing daylight in the morning is a signal for the birds to start singing. Explain how the information in the graph supports this idea.

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(d) Predict what might happen to the level of birdsong during the evening. Justify your prediction.

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1 mark

2 marks

2 marks

3 marks

___________________________________________________________________________

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Question 20 DUCKWEED

Donald and Liz are investigating whether changing the amount of fertiliser in water will affect the growth of the duckweed.

First they set up four identical containers of water. In each container they put a different concentration of fertiliser in the water. Then they put 10 duckweed plants in each container. They leave the containers for three weeks.

(a) The diagram above shows the containers after three weeks. Count the number of duckweek plants in each one and record the results in the boxes provided. The first box has been done for you.

(b) What concentration of fertiliser did the duckweed grow best in?

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(c) Record two things Donald and Liz did to set up a fair test.

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(d) Record two more things you would do to make the test fair.

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(e) From the results in container 1 what can you infer about duckweed?

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3 marks

1 mark

2 marks

2 marks

2 marks

Question 21 HEAT RADIATION

Some black cotton fabric and some white cotton fabric were each cut to a size of 2cm x 2cm. The pieces of fabric were wrapped around the bulbs of two separate thermometers. The thermometers were clamped and placed 10cm from a light globe so that the globe was positioned in the centre. The light globe was switched on and the temperature of each thermometer was recorded every minute for 10 minutes.

RESULTS

Time (min) 0 1 2 3 4 5 6 7 8 9 10

Black Fabric Temp (Co)

23 24 25.5 26 27 27.5 29 30 32 34.5 36

White Fabric Temp (Co)

23 23.5 24 24 24.5 24.5 25 26 27 27.5 28

(a) Draw a double line graph for the above results. Give the graph a suitable title, label axis and complete a key _____________________________________________

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KEY

8 marks

__________________________________________

Question 21 HEAT RADIATION (continued)

(b) Identify the independent variable

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(c) Identify the dependent variable

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(d) From the graph identify which colour absorbed more heat.

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(e) What do you predict would happen if the thermometers were moved twice the distance

away from the light globe?

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(f) Explain why the students used the light globe.

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1 mark

1 mark

1 mark

2 marks

2 marks

Question 22 SOUND, LIGHT and LASARS

Claire is sitting in her bedroom listening to music. The sound she hears is produced by the loudspeaker in her radio.

(a) What is the loudspeaker doing to produce the sound?

Tick the correct box.

blowing

filtering

spinning

vibrating

(b) How does the sound get from the radio to Claire?

__________________________________________________________________________

__________________________________________________________________________

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The table below shows the lowest and highest frequencies that five living things can hear.

Living Things

lowest frequency(Hz)

highest frequency(Hz)

human 20 20 000

sparrow 300 20 000

dog 20 45 000

cat 20 64 000

rabbit 300 42 000

(c) Which three living things from the table cannot hear a frequency of 43 000 Hz?

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1 mark

2 marks

3 marks

1 mark

___________________________________________________________________________

(d) From the table, choose the living thing that can hear the biggest range of frequencies.

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A teacher shines a laser beam onto a classroom window. It reflects off the window and onto a screen.

window

screen

laser beam

(e) On the diagram above, continue the laser beam to show its path as it reflects off the window and onto the screen. Use a ruler.Add arrows to show the direction of the laser beam.

(f) The diagrams below show light about to enter a convex and concave lens. Complete the diagrams showing what happens to the light rays as they pass through the lenses.

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3 marks

4 marks

Question 23 DYNAMIC EARTH

280 million years ago all the continents were joined as one large continent, as shown in diagram P.

Over time this continent broke up and moved apart into the continents we know today.

Diagrams Q, R and S show three other positions of the continents between the past and today. The diagrams are not necessarily in correct order.

(a) Starting with P, list the diagrams in correct sequence.

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1 mark

The map shows the movement of crustal plates in the Australia, Antarctica and New Zealand region.

The diagrams below show plate boundary types.

Use the map and diagram to answer questions (b) and (c).

(b) Name what type of boundary is found underneath New Zealand.

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(c) Predict what countries are likely to have active volcanoes. Justify your answer.

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1 mark

3 marks

NAME: ______________________________________________________

Class/Teacher: _________________________________________________

Multiple Choice Answer Sheet

1 A B C D

2 A B C D

3 A B C D

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4 A B C D

5 A B C D

6 A B C D

7 A B C D

8 A B C D

9 A B C D

10 A B C D

11 A B C D

12 A B C D

13 A B C D

14 A B C D

15 A B C D

16 A B C D

17 A B C D

18 A B C D

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