YEAR 7 SCIENCE EXAMINATION Semester 2, 2019

WRITTEN QUESTION AND ANSWER BOOKLET

STUDENT NAME:

TEACHER NAME:

DATE: TIME ALLOWED FOR THIS PAPER: Reading time before commencing work: 10 minutes Working time for this paper: 1 hour 30 minutes

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

- This question and answer booklets - To be provided by the candidate: - Pens, pencils, ruler, eraser

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 the paper to familiarise yourself with all of the questions.

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

3. Write your answers in this booklet.

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.

Instructions to candidates

1. Sitting this examination implies that you agree to abide by the examination rules set down by Kinross

College. 2. Answer the questions in the space provided. 3. You must be careful to confine your responses to the specific questions asked and to follow any

instructions that are specific to a particular question. 4. A spare page is included at the end of this booklet. It can be used for planning your responses

and/or as additional space if required to continue an answer. (a) Planning: If you use the spare page for planning, indicate this clearly at the top of the page. If

you choose to use lined paper for planning, ensure your name and the title is clearly printed. (b) Continuing an answer: If you need to use the space to continue an answer give the page

number. Fill in the number of the question (s) that you are continuing to answer at the top of the page.

5. This examination contributes towards your report. If you have any questions, please ask them during the ten-minute reading time. Manage your time wisely. Always provide substantiation (evidence). Make sure that what you have written makes sense.

Topic Section Marks

Biology Multiple Choice /15 Keyword Definitions /5

Short Answer /25

Physical Science Multiple Choice /15 Keyword definitions /5

Short Answer /25 Total /90

Note: Do not turn the page until you are asked to do so.

STUDENT NAME: _______________________________________________

MULTIPLE CHOICE ANSWER SHEET

Circle the letter indicating the best answer.

1 A B C D

2 A B C D

3 A B C D

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

19 A B C D

20 A B C D

21 A B C D

22 A B C D

23 A B C D

24 A B C D

25 A B C D

26 A B C D

27 A B C D

28 A B C D

29 A B C D

30 A B C D

MULTIPLE CHOICE QUESTIONS: PART A

1. A vertebrate is an animal

a. that can fly

b. that has a backbone

c. that does not have a backbone

d. that lives on land

2. The correct order for classifying organisms is

a. Kingdom, Phylum, Class, Order, Family, Genus, Species

b. Phylum, Class, Kingdom, Species, Genus, Order, Family

c. Kingdom, Species, Family, Order, Phylum, Genus, Class

d. Family, Kingdom, Phylum, Order, Class, Genus, Species

3. A dichotomous key helps you identify organisms by asking questions with how many possible answers?

a. 2

b. 3

c. 4

d. 5

4. Vertebrates can be organised into which five classes?

a. Mammals, protists, reptiles, fish, birds

b. Mammals, amphibians, reptiles, fish, birds

c. bacteria, amphibians, reptiles, fish, birds

d. Mammals, amphibians, bacteria, fish, birds

5. Which of the Kingdoms only contains multi-cellular organisms?

a. Animalia

b. Fungi

c. Monera

d. Protista

6. Alyssa observes an animal that she doesn’t recognise. It appears to be covered in hair or fur and is

swimming in the river using its large feet and long tail. She decides it must be:

a. A fish, because it is in the river

b. A bird, because it has large feet

c. A mammal, because it has hair or fur

d. A reptile, because it has a long tail

7. James finds an organism growing in his garden that he doesn’t recognise and is unsure whether it is a

plant or a fungus. It is growing out of the soil, has a stem with a mushroom shaped head and is green in

colour. He decides to cover it with a box to leave it in the dark for a few weeks. When he returns it is

still alive. He concludes:

a. It is a plant, because it is green

b. It is a fungus, because it looks like a mushroom

c. It is a plant, because it was growing in the soil

d. It is a fungus, because it didn’t need light to survive

8. In a food chain, organisms that make their own food from sunlight are:

a. The sun

b. Producers

c. Consumers

d. Decomposers

9. In a food chain, organisms that eat other living organisms are:

a. The sun

b. Producers

c. Consumers

d. Decomposers

10. Which of these human activities has a positive effect on food webs

a. Opening up an area of bushland for recreational activities

b. Removing introduced predators from an area

c. Overfishing particular fish species causing a decline in numbers

d. Introducing exotic species, such as rabbits and foxes

11. Human activities have led to degradation of the physical environment. When used in this context, what

does the word ‘degradation’ mean?

a. increased pollution

b. spoiling or making less useful

c. improvement in value

d. destruction

12. X shrimp fish sea lion shark

The most likely organism to replace “X” in the above food chain would be:

a. Seaweed

b. Whale

c. Snail

d. Crab

13. Green plants are classed as producers because they:

a. Produce food for animals

b. Produce oxygen for animals

c. Produce food for themselves from sunlight

d. Produce compost for the soil

14. Organisms like bacteria and fungi are classed as decomposers because they:

a. Break down in sunlight

b. Break down light energy

c. Break down soil into sand and clay

d. Break down dead organisms to recycle nutrients

15. Grass caterpillar small bird hawk

In the food chain above, if there was a sudden drop in the number of small birds then the number of

caterpillars would:

a. Go up, because they have more to eat

b. Go down, because they have less to eat

c. Go up, because less of them get eaten

d. Go down, because more of them get eaten

16. The definition of a Force is:

a. A push or pull

b. The mass of an object

c. Balancing of objects

d. All of the above

17. An example of a balanced force is:

a. Two people playing tug-o-war with equal force

b. Riding a bike up a steep hill on a windy day

c. Skateboarding down a steep bumpy road

d. Pushing a shopping trolley up an escalator with a broken wheel

18. The unit used to measure forces is:

a. Newton (N)

b. Centimetre (Cm)

c. Decibel (Db)

d. Kilogram (Kg)

19. Which of the following is NOT a way to reduce Friction?

a. Lubricating the surfaces of objects

b. Reducing the amount of pressure on the objects

c. Reducing the amount of contact between objects

d. Increasing the roughness of the surface of objects.

Question 20 and 21 refer to the picture below:

20. North poles and South poles of the magnet are indicated by the letters. Which pairs of

magnets will attract each other?

a. Pair 1

b. None of them

c. Pair 3

d. Pair 1 and 2

21. Which pairs of magnets will repel each other?

a. Pair 1 and 2

b. Pair 2 and 3

c. All of them

d. Pair 3 only

22. Gravity is a force of:

a. Attraction

b. Addition

c. Subtraction

d. Repulsion

23. Simple Machines that increase the force you apply to do a job are called?

a. Force Multipliers

b. Force Minimiser

c. Force Magnifier

d. Gravity

24. If Earth did not have a gravitational field, what would happen to objects on the Earth’s surface?

a. Objects would sink into the ground

b. Objects would float away into space

c. Objects would stick together like magnets

d. Objects would float above the ocean

Pair 1

Pair 2

Pair 3

25. A wheelbarrow is an example of:

a. A first class lever

b. A second class lever

c. A third class lever

d. A fourth class lever

26. When comparing the Moon and the Earth, it is true to say that a person will have a greater

weight on:

a. the Moon than on the Earth, because the Moon’s gravity is greater than the Earth’s.

b. the Earth than on the Moon, because the Earth’s gravity is greater than the Moon’s.

c. the Moon than on the Earth, because the Earth’s gravity is greater than the Moon’s.

d. the Earth than on the Moon, because the Moon’s gravity is greater than the Earth’s.

27. Which of the following best describes why a Spring Tide is larger than a regular tide?

a. The weather in spring is more windy

b. The Earth’s gravity pulls the water more because it is closer to the Sun

c. The Sun and the Moon’s gravity both pull the water together

d. The Earth is spinning more quickly which sloshes the water around more

28. A car is slowing down so that it can stop at a traffic light. What must be true about the forces

acting on the car?

a. The forces are balanced and the net force is backwards.

b. The forces are balanced and there is no net force.

c. The forces are unbalanced and the net force is forwards.

d. The forces are unbalanced and the net force is backwards.

29. The device that scientists use to measure forces is called a:

a. Scale

b. Spring balance

c. Measuring cylinder

d. Camera

30. What causes your hair to stand on end when you slide down a plastic slide at a park?

a. Gravity

b. Static Electricity

c. Magnetism

d. Heat

END OF MULTIPLE CHOICE SECTION

Keywords Definitions 5 MARKS

Below is a list of keywords. Complete the table by writing each keyword next to its definition:

Ectotherm; Dichotomous key; Food chain; Biodiversity; Consumers

Keyword Definition

A diagram used in classification; each ‘arm’ of the key contains two choices

An organism with a body temperature that changes with the environment

Animals that can’t convert the Sun’s energy into sugars and must eat to get the energy they need to survive

A diagram that shows who eats who in an ecosystem and how nutrients and energy are passed on

The variety of life; the different plants, animals and microorganisms and the ecosystems they live in

PART B: SHORT ANSWER – BIOLOGY SECTION 25 Marks

31. An introduced species is a species that has been brought into an ecosystem that it does not usually live in

by human activity. Give an example of an introduced species and give two negative effects that introduced

species can cause in an ecosystem.

Example: __________________________________________ (1 mark)

Effects:

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

____________________________________________________ (2 marks)

32. Rod finds part of a scientist’s notebook. It contains the following information about an animal:

“It breathes air, lays eggs and maintains a constant body temperature”

Is this animal a reptile, a bird or an amphibian? Explain your answer:

It is a: ________________________________________ (1 mark)

Because: ________________________________________ (1 mark)

33. Below is a paired statement key for identifying molluscs. Convert it into a branching key.

(5 marks)

34. Below are two food webs. One with low biodiversity, and the other with high biodiversity:

There is an outbreak of a disease that severely reduces the numbers of Parasitic Wasps in

both these food webs. Describe and compare the impact this would have on the numbers

of leaf hoppers and lizards within both food webs, and use this information to explain why a

high biodiversity is a good thing:

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

____________________________________________________________ (5 marks)

35. Write a dichotomous key that can be used to classify the following organisms:

(5 marks)

36. A group of new houses have been built next to an area of wild bushland. The local environmental

group want to protect the wildlife that live in the bushland and are proposing that people moving in

to the houses are not allowed to keep pets.

Using your knowledge of food webs:

a. Suggest how pets might impact the local wildlife

_______________________________________________________________________

_________________________________________________________________(1 mark)

b. Give an example of a species pet that would impact on the local wildlife and explain the

impact it would have:

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

_____________________________________________________________ (2 marks)

c. Suggest a rule that would allow people to keep pets without impacting local wildlife and

explain how this would help:

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

_____________________________________________________________ (2 marks)

Keywords Definitions 5 MARKS

Below is a list of keywords. Complete the table by writing each keyword next to its definition:

Streamlining Friction Orbit Mass Weight

Keyword Definition

the path a planet moves around the Sun/star, or a moon moves around a planet

making a surface smooth and rounded to reduce friction

a measure of how much gravity is pulling on an object

force that acts to oppose the motion between two surfaces as they move over each other

how many particles or atoms make up an object

PART B: SHORT ANSWER – PHYSICS SECTION (25 Marks)

37. In the boxes below draw a diagram of the following: You must label the Effort, Fulcrum and

Load. (6 marks)

1st class lever

2nd class lever

3rd class lever

38. Nick is driving down to Albany to go on a camping holiday.

He has tied everything he might need to his car’s roof rack.

Identify two forces that will increase as a result, and explain why

This will mean that he uses more petrol than normal.

Force 1: ___________________________

Explanation: _________________________________________

___________________________________________________

Force 2: ___________________________

Explanation: ___________________________________________________________

_____________________________________________________________________(4 marks)

39. Explain how you could make a simple compass using a bar magnet and other items

commonly found in a school science department. (3 marks)

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

40. An astronaut has been travelling through outer space on a rocket ship for 6 months.

a. People become weightless when they travel through outer space. Explain in detail what

being weightless means. (3 marks)

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

b. Why will the astronaut find it difficult to walk and move around when he gets back to Earth?

(2 marks)

________________________________________________________________________

________________________________________________________________________

________________________________________________________________________

41. Beck carried out an investigation to find out the best way of lowering the amount of

friction on a ramp. She sets up 5 identical wooden ramps and covers them in different

substances. She then records the time it takes a wooden block to slide down the ramp.

The table below shows Beck’s results:

Substance on Ramp Time for block to slide down ramp (seconds)

Cooking Oil 2.5

Syrup 6.5 Butter 3.0

Chalk 5.0 Wax 4.0

a. On the grid on the next page, draw a graph showing the data. (5 marks)

b. Using the data or your graph, write a conclusion for the investigation.

(2 marks)

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

***END OF EXAM***