TEST CODE 09630010 FORM PT 2019348

GUYANA MINISTRY OF EDUCATION

NATIONAL GRADE SIX ASSESSMENT

SCIENCE

Paper 01

(APRIL 17, 2019 (p.m.))

1 hour and 10 minutes

READ THE FOLLOWING INSTRUCTIONS CAREFULLY.

1. This test has 40 questions. You have 1 hour and 10 minutes to answer them.

2. Each question has four suggested answers: (A), (B), (C) and (D). Read each question carefully, then choose the correct answer.

3. On your answer sheet, find the number that matches the question you intend to answer.

4. Shade the circle with the letter, (A), (B), (C) or (D), that matches your answer for each question.

Sample Question

Carbon dioxide is a

(A) (B) (C) (D)

mixture liquid solid gas

The correct answer is "gas", so (D) has been shaded.

Sample Answer

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5. If you want to change your answer, erase it completely before you fill in your new choice.

6. When the supervisor tells you to begin, turn the page and work as quickly and as carefully as you can.

7. If you try a question and find that you cannot answer it, leave it and go on to the next one. You may return to that question later.

8. You must not use calculators for this examination. Rough work may be done in this booklet.

DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.

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1. What happens in the human body when someone engages in physical exercise?

(A) Less energy is needed.

(B) The heart beats faster.

(C) More oxygen is produced.

(D) Less carbon dioxide is produced.

Question 2 refers to the following diagram of the human female reproductive

system.

2. The parts labelled R and Q are

R Q

(A) ovary cervix

(B) cervix vagina

(C) fallopian tube vagina

(D) ovary uterus

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3. Which of the following groups of organs helps in carrying out the exchange of

gases in a human body?

(A) Heart, nose and gullet

(B) Lungs, nose and windpipe

(C) Skull, ribcage and backbones

(D) Blood vessels, gullet and lungs

4. Which of the following groups of animals is a class of vertebrates?

(A) Reptiles

(B) Molluscs

(C) Annelids

(D) Arthropods

Question 5 refers to the following diagram which shows an animal, Y.

Animal Y

5. Animal Y belongs to the group called

(A) worms.

(B) molluscs.

(C) myriapods.

(D) arthropods.

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6. Houseflies, mice and mosquitoes are a threat to humans because they

(A) destroy properties.

(B) spread diseases.

(C) damage crops.

(D) spread litter.

7. Which of the following groups of conditions/substances is needed for

photosynthesis to occur in plants?

(A) Oxygen, chlorophyll, starch, sunlight

(B) Water, warmth, carbon dioxide, starch

(C) Sunlight, water, carbon dioxide, chlorophyll

(D) Carbon dioxide, warmth, starch, chlorophyll

Question 8 refers to the following diagram which shows the cross-section of a

flower.

Q

-1-------,£----/--- - p

1-----tt--+----t---- R

1-t----+---- - s -+\--H-+-------,~--- T

8. The female parts of the flower are labelled

(A) Q, R

(B) P, S

(C) Q, R, T

(D) P, Q, S

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9. Air pollution can be caused by

(A) closing down factories in the central area of the country.

(B) the burning of trees and other waste materials.

(C) using more bicycles instead of cars.

(D) the installation of streetlights.

10. The water cycle on Earth can take place repeatedly because water

(A) freezes at ooc and boils at 1 00°C.

(B) has volume and is not compressible.

(C) is essential for the survival of living things.

(D) changes state when it gains or loses heat.

11. Rakesh wants a piece of material that is waterproof, strong and flexible for his

project. Which of the following materials must he choose?

(A) Rock

(B) Glass

(C) Wood

(D) Rubber

12. Which of the following factors causes the sun to appear to change its position

during different times of the day?

(A) The sun's revolution around the Earth

(B) The Earth's rotation about its own axis

(C) The Earth's revolution around the sun

(D) The moon's rotation around the Earth

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13. Which of the following activities will not help to conserve electricity?

(A) Using energy-saving bulbs

(B) Using natural ventilation instead of fans

(C) Leaving the computer on standby mode overnight

(D) Switching off electrical appliances when they are not in use

Question 14 refers to the following diagram which shows a human arm that can

act as a lever.

R

14. Which of the following options correctly identifies the parts of the lever labelled

P, Q and R?

p Q R (A) Effort Fulcrum Load

(B) Effort Load Fulcrum

(C) Load Effort Fulcrum

(D) Load Fulcrum Effort

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Question 15 refers to the following diagram which shows one of the systems of

the body.

15. Which of the following is not a function of the human body system shown

above?

(A) Carries blood to the different body parts

(B) Transports some waste from parts of the body (C) Transports nutrients to the different body parts

(D) Stores waste products before removal from the body

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Question 16 refers to the following diagram which shows the direction of the

flow of blood in the body.

X I Lungs I

Heart

y

I Other parts of the body I

16. Blood flowing in the body may be described as oxygenated or deoxygenated.

Which of the following is correct for the blood flowing at X and at Y?

X y

(A) Deoxygenated Oxygenated

(B) Oxygenated Oxygenated

(C) Oxygenated Deoxygenated

(D) Deoxygenated Deoxygenated

17. In the following table, four body systems are matched to a function. Which body

system has its function incorrectly matched?

Body System Function

(A) Skeletal To give shape to the body

(B) Digestive To break down food into simple substances

(C) Respiratory To take in oxygen and remove carbon dioxide

(D) Muscular To protect the body's main organs

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18. Which of the following features reduces the rate of heat loss in a vertebrate?

(A) Watertight skin on reptiles

(B) Leathery skin on sharks

(C) Feathers on birds

(D) Scales on a fish

Question 19 refers to the following diagram which shows four organisms.

Frog Butterfly Cockroach Grasshopper

19. Which pair of organisms above undergoes four stages in their life cycle?

(A) Frog and butterfly

(B) Cockroach and frog

(C) Grasshopper and butterfly

(D) Cockroach and grasshopper

20. Which of the following parts of the flower correctly indicate where pollination

and fertilization occur?

Pollination Fertilization

(A) Stigma Style

(B) Anther Ovary

(C) Anther Filament

(D) Stigma Ovary

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21. Which of the following flowers can develop into a fruit after poll ination occurs?

G H J

(A) Hand I

(B) Hand J

(C) G and I

(D) G and J

22. Which of the following are ways in wh ich the cactus plant is adapted to survive

in the desert?

I. Fleshy green stem to store water

II. Spiny leaves to prevent water loss

Ill. Roots go very deep into the soil for absorbing water

(A) I and II only

(B) I and Ill only

(C) II and Ill only

(D) I, II and Ill

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23. Pollution is most likely reduced by

(A) burying non-biodegradable waste.

(B) building taller chimneys for factories.

(C) cutting down a vast number of trees to make lumber.

(D) using cow manure in farming instead of artificial fertilizers.

24. Which of the following water conservation techniques involves reusing water

instead of throwing it away?

(A) Take a bath using a bucket of water.

(B) Purify water to make bottled water for drinking.

(C) Collect water used for rinsing clothes to flush the toilet.

(D) Use a bucket of water instead of a hose when washing a car.

25. When Marcus poured water into a container filled with sand, bubbles were seen

at the surface of the sand. Which of the following statements correctly explains

why this occurred?

(A) Air within the sand particles is pushed to the surface as the water takes

its place.

(B) Air is produced when the sand dissolves in the water and floats to the

surface. (C) Air from the surroundings becomes trapped in the sand as the water is

poured.

(D) Air in the water cannot pass through the sand particles and remains on

the surface of the water.

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26. Some items that are attracted by an electromagnet include

(A) an iron nail and a steel spoon.

(B) a steel teapot and a gold ring.

(C) a copper coin and an iron nail.

(D) an aluminium can and a copper coin.

27. Which of the following objects does not possess kinetic energy?

(A) A rotating windmill

(B) A lighted torchlight

(C) A boulder falling off a steep cliff

(D) A pebble released from a catapult

28. An empty test tube was heated over a Bunsen burner, as shown in the following

diagram. After some time, the stopper popped out of the test tube.

Test tube

Which of the following statements could explain why the stopper popped out?

(A) The stopper expanded.

(B) The test tube contracted.

(C) The surrounding air contracted.

(D) The air in the test tube expanded.

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29. In which of the following cases is friction most likely to make the work done

harder?

(A) Pushing a cabinet over the floor

(B) Erasing pencil marks on a book

(C) Stopping a moving bicycle

(D) Sharpening a kitchen knife

30. A ball is thrown upwards. Which of the following statements about the movement

of the ball is true?

(A) The force of gravity causes the ball to change its mass.

(B) There is no force of gravity acting on the ball when it reaches the highest

point.

(C) When the ball is moving upwards, the force of gravity does not act on

it.

(D) The force of gravity causes the ball to change its direction of movement.

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Question 31 refers to the following diagram which shows the human digestive

system.

31. Which of the parts labelled P, Q, R or S contains undigested food?

(A) p

(B) Q

(C) R

(D) S

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Question 32 refers to the following table which shows the features of four

invertebrates, W, X, Y and Z.

Invertebrate Feature

w Segmented bodies

X Protective shells y Jointed legs

z Muscular foot

32. Which two invertebrates belong to the same group?

(A) X and Z

(B) Y and Z

(C) Wand X

(D) Wand Y

Question 33 refers to the following table which shows four different conditions

under which four similar seeds, P, Q, Rand S, are placed.

p Q R s Light Light No light No light

Water No water No water Water

Air Air Air Air 30 oc 30 oc 30 oc 30 oc

33. Which of the seeds above will germinate?

(A) S only

(B) P and S only

(C) P and Q only

(D) Rand S only

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34. Mia places four pots with similar plants, W, X, Y and Z, in different conditions as

outlined in the following table.

Plant Air

Conditions

Water Sunlight Fertilizer w X ./ ./ ./

X ./ X ./ ./ y ./ ./ ./ X

z ./ ./ X ./

Key: ./ Condition present, x Condition not present

Which of the plants, W, X, Y or Z, is most likely to live the longest?

(A) W

(B) X

(C) y

(D) Z

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Question 35 refers to the following diagram of a food web.

~rasses ~ ~rnins

35. If rabbits are removed from the food web, what will most likely happen?

(A) The population of foxes will increase rapidly.

(B) Fewer carrots will be available to the farmer.

(C) The population of foxes will decrease.

(D) The population of birds will increase.

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