Name: ________________________________________

Yr 8 Science Exam Multiple Choice Answer Sheet

END OF PART A COMMENCE PART B (SHORT ANSWERS)

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YEAR 8 SCIENCE EXAMINATION - SEMESTER 1, 2018

QUESTION AND ANSWER BOOKLET

DO NOT ANSWER ON THIS SHEET USE ATTACHED ANSWER GRID

TIME ALLOWED FOR THIS EXAM: Reading time before commencing work: 10 minutes Working time for this paper: 1 hour 50 minutes

MATERIAL REQUIRED / RECOMMENDED FOR THIS PAPER: To be provided by the supervisor:

- This question booklet and answer booklet

To be provided by the candidate:

- Pens, pencils, calculator, eraser and ruler

IMPORTANT NOTE TO CANDIDATES: No other items may be taken into the examination room. It is your responsibility to ensure that you do not have any unauthorised notes or other items of a non-personal nature in the examination room. If you have any unauthorised material with you, hand it to the supervisor BEFORE reading any further. All iPads and mobile phones must be turned off and in your bag along with any other devices and notes. Bags are to be closed and placed under the desk.

INSTRUCTION TO CANDIDATES:

1. Read through both papers to familiarise yourself with all the questions.

2. Use a blue or black ballpoint / ink pen for written answers. Use pencil for drawing the graph.

3. Write your answers in the booklets.

4. Should you require more space than you have been given please use the spare sheet (at the back of this booklet) and ensure that you include your name and the question / statement to which you are responding.

AT THE END OF THE EXAMINATION:

- Any planning sheets or other pieces of paper MUST be handed in with this booklet. - At the end of the examination make sure that your name is on your booklet and any other

pieces of paper used.

Do not turn this page until you are asked to do so.

MULTI-CHOICE CHOOSE THE LETTER WHICH BEST FITS THE STATEMENT OR QUESTION: (USE THE ANSWER SHEET BEFORE THIS PAGE)

1.

EARTH SCIENCE & TOOLKIT

1. Which one of the following is not safe behaviour in a science laboratory?

A. Wearing a lab coat when using chemicals.

B. Wearing closed-toed shoes at all times in a laboratory.

C. Wearing long hair out when using Bunsen burners.

D. Wearing safety glasses when heating substances.

You are conducting a simple experiment to determine the optimal amount of water required each day for bean plants to sprout from seed.

2. The independent variable of the experiment above is:

A. the type of seeds used.

B. the amount of water used each day.

C. the time taken for the seeds to sprout.

D. the time of day the seeds are watered.

3. A variable that should be controlled in the above experiment is:

A. the amount and intensity of light received by each plant.

B. the time taken for the seeds to sprout.

C. the amount of water used each day.

D. what the experimenter has for lunch.

4. The Rock Cycle can explain:

A. How a sedimentary rock can become metamorphic

B. How a metamorphic rock can become sedimentary

C. How all rocks can become igneous

D. All of the above.

5. Which of the following is an igneous rock?

A. Pumice

B. Diamond

C. Limestone

D. Marble

6. Where are the oldest layers of rock usually found in a cliff made from

sedimentary rock?

A. At the top

B. In the middle

C. At the bottom

D. At the top and in the middle

7. Which type of rock often contains fossils?

A. Sedimentary

B. Igneous

C. Metamorphic

D. All of them will contain fossils

8. Rock that forms from the cooling of magma or lava:

A. Metamorphic rock.

B. Igneous rock.

C. Sedimentary rock.

D. Volcanic rock.

9. What two factors does a metamorphic rock need to form?

A. Weathering and erosion

B. Heat and pressure

C. Cooling and solidification

D. Crystallisation and evaporation

10. The destruction of rocks by frost shattering is an example of:

A. chemical weathering.

B. erosion.

C. biological weathering.

D. physical weathering.

11. What is the useful output energy of a lightbulb?

A. Electricity

B. Chemical

C. Heat

D. Light

12. Which flow diagram shows the correct energy transforms that happen in a

hydroelectric power station.

A. Electrical Gravitational potential Kinetic

B. Gravitational potential Kinetic Electrical

C. Solar Electrical Kinetic

D. Thermal Kinetic Electrical

13. Kinetic energy is also known as: a) Heat energy

b) Movement energy

c) Stored energy

d) Light energy

14. Energy: a) Can be created, but not destroyed.

b) Cannot be created or destroyed.

c) Can be created and destroyed

d) Cannot be created, but can be destroyed.

15. Thermal energy is also known as; a) Heat energy

b) Movement energy

c) Stored energy

d) Light energy

16. Potential energy is also known as: a) Heat energy

b) Movement energy

c) Stored energy

d) Light energy

17. Four vehicles are travelling at the same speed. Which has the least kinetic energy? a) A bike

b) A car

c) A bus

d) road train

18. Which of the following is not a form of energy? a) Nuclear

b) Elastic

c) Friction

d) Kinetic

19. Four balls are positioned 10m above the ground. Which has the least gravitational potential energy? a) Ping pong ball

b) Golf ball

c) Cricket ball

d) Bowling ball

20. An archer shoots an arrow from a bow. The useful energy change as he releases the arrow is: a) Elastic kinetic

b) Kinetic elastic

c) Chemical gravitational

d) Heat --> electrical

End of multiple choice section

KEYWORDS AND DEFINITIONS Match the definitions to the appropriate keyword.

Keywords Definitions 1 metamorphic rock a a substance that is destructive to living

tissues, such as skin and eyes, or to some types of metals

2 hazard b breakdown of rocks and minerals by movement of water and animals, and extremes of temperature

3 weathering c rock formed from other rock that has experienced intense heat and pressure

4 erosion d the process of disassembling and studying the internal structures of plants, animals and humans

5 corrosive e energy stored in objects and waiting to be used

6 transform f rock formed from compacted mud, sand or pebbles, or the remains of living things

7 potential energy g something that has the potential to put your health and safety at risk

8 sedimentary rock h energy of motion or moving objects 9 kinetic energy i movement of sediment to another area

10 dissection j changed one form of energy into another form of energy

Put the letter of the correct definition to the keyword. Keywords Definitions

1 2

3

4 5

6 7

8

9 10

SHORT ANSWERS (62 marks): EARTH SCIENCE AND TOOLKIT (30 MARKS) 1. Use the following four words to label 1,2,3 & 4 on the diagram below showing the rock cycle . (cooling, melting, weathering & erosion, metamorphic rocks) (4 marks)

2 . Name and describe one method that a palaeontologist can use to estimate

the age of a fossil. (2 marks)

Name of method:

Description:

3. Look at Fig 3. a) What type of weathering is shown? Circle your answer Physical Chemical Biological (1 mark)

b) Explain your answer for part a.

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ________________________________________________________________ (2 marks)

1……………………….

2………………………

3………………………

4………………………

Figure 3

C) Compare and contrast the terms weathering and erosion. Write down one thing

they have in common and one thing that is different. (2 marks)

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

d) Analyse the picture. What are three things that you can see that are evidence that erosion has taken place in this area?

(3 marks) ________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________

__________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________

You have been asked to select a building material for a new construction and

have narrowed the choice down to three minerals. Your final decision will be

based on which of the minerals is the hardest.

10. Describe how you would test the minerals to put them in order of hardness, without looking them up on the Mohs scale. (3 marks) ________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________

________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________

________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________

________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________

11. Label the Venn diagram and use it to compare and contrast intrusive igneous rocks and extrusive igneous rocks. (4 marks)

13. Write the correct meaning next to each hazard sign. Choose from

oxidising; irritant; flammable; corrosive (4 marks)

i.

ii.

iii.

iv.

13. A student reacted two chemicals together and recorded the

temperature of the reaction for 8 minutes.

- Create a line graph of the set of data that was obtained. (5 marks)

Include Title, label, units, scale

PHYSICS (32 MARKS)

14. For the devices shown, write down the main input energy and the

main output energy. (One has been done for you) (5 marks)

a) Bike

b) Pump

c) Catapult

d) Whistle

e) TV

f) Snowboard

15. Below is an energy transfer arrow for a light bulb. It shows that a light bulb converts electrical energy into a lot of heat energy and a little bit of light energy. 16. Create energy transfer diagrams for the following: a) Electrical heater (2 marks)

b) Playing music on your phone (2 marks)

16. There are 3 main types of potential energy: name the two that are missing and give an example for the third. (3 marks)

Type Example

a) A stretched rubber band, windup toy.

b) A candle that can burn to give out light and heat.

Gravitational c)

17. Energy efficiency is a calculation of the percentage of useful energy transformed. a) Calculate the energy efficiency of a hairdryer that has 800 unit of energy input and 600 units of useful energy output. (2 marks)

b) Calculate the energy efficiency of a kettle that wastes 120 units of energy output and has 540 units of energy input. [ Hint – work out the useful energy first] (3 marks)

Energy efficiency = useful energy output x 100

Energy input

18.

19.

20. You have been given some equipment to conduct an experiment to find out how the amount of potential energy starts with affects the amount of kinetic energy it ends up with.

The equipment you have is: A ball, a ramp, a ruler, some books, a plastic cup, a tape measure, a protractor and a stop watch.

a) Write a step – by-step method that you could use to find out if the amount of potential energy an object starts with affects the amount of kinetic energy it ends up with. (3 marks)

b) What is the independent variable in the experiment? (1 mark)

c) What is the dependent variable in the experiment? (1 mark)

END OF EXAM