mid test set 4

7/27/2019 Mid Test Set 4

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Prepared By: K.C. Ngu Form One: Science Set 4

Mid Test1. P, Q, R and S are steps in a scientific

experiment. State the correct sequence.

P Making a hypothesis

Q Forming a summary or conclusion

R Identifying the problem

S Testing the hypothesis by doing an experiment

2. 20 cm 3 of water is poured into a 40 cm 3bottle. If one iron shot can displace 0.2 cm

3

water, how many iron shots are needed to

completely fill the bottle?

3. Figure below shows an outline of a leaftraced on a piece of graph paper. Estimate

the area of the leaf.

4. When 20 drops of water flow out of avertical burette, the water level changes

from 40 cm3

to 45 cm3. Calculate the

volume of a drop of water.

5. Amir wishes to determine the volume of amarble. He uses 10 marbles of the same sizeand a measuring cylinder. Based on the

below figure, what is the volume of one

marble?

6. W, X, Y and Z are steps taken whenmeasuring the temperature of a human body.

State the correct sequence.

W Put the thermometer under the tongue

for a few minutes

X Dip the thermometer into a beaker

containing antiseptic

Y Shake the thermometer

Z Take the reading of the thermometer

7. Figure below shows a simple pendulummoving fromX to Zand then back again to

X. Which of the following influences the

period of oscillation of a simple pendulum?

A The weight of the pendulum

B The thickness of the thread

C The length of the thread

D The number of oscillations

8. The distance between P and Q shown in thebelow figure can be measured by using

I some thread and a meter rule

II internal calipers and a meter rule

III external calipers and a piece of graph

paper

9. Figure below shows a non luminous flameof a Bunsen burner. K,L,MandNare three

different areas of the flame. Which areas

have the highest and lowest temperature?

10. A human cheek cell and an onion cell aresimilar because both possess

A nuclei C vacuoles

B cell walls D chloroplasts


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11. Which structure can only be found in a plantcell?

A Cell membrane C Cytoplasm

B A nucleus D A chloroplast

12. Based on the information given below,which is true aboutR, Sand T?

R A group of cells performing

the same function

S A basic unit of a living

organism

T A few groups of tissues

involved in a specific function

R S T

A Liver Muscle Ovum

B Muscle Ovum Liver

C Ovum Muscle Liver

D Liver Ovum Muscle

13. Based on the below information, which iscorrect about organXand system Y?

OrganX Organ Y

A Ear Respiratory

B Alveolus DigestiveC Uterus Reproductive

D Red blood cell Circulatory

14. Which structure labelled A, B, C or D asshown in the below figure is not found in an

animal cell?

15. Which part of a plant cell as shown in thebelow figure is not found in an animal cell?

I cytoplasm II Big vacuoles

III Cell walls

16. Figure below shows the structure of a cell.Which organism has this type of cell?

I A rabbit II A cockroach

III A mushroom

17. Figure below shows the organization of cellsin the human body. Which of the following

are examples of stage P?

A Stomach, platelet, eye

B Kidney, sperm, ear

C Liver, ovum, lung

D Uterus, skin, nose

18. Which of the following statements show thathuman is special compared to other living

things?

I Human can think rationally

II Human can communicate with oneanother

III Human suckles, takes care and teaches

his young

19. Some potassium (VII) manganate crystalsare put into a test tube containing water asshown in the figure above. Which of the

following is seen after a few days?


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20. Figure below shows the different weights ofwater, ethanol, benzene and carbon

tetrachloride. The volume of the liquids and

the size of the beakers are similar. State the

correct arrangement of liquids according to

descending densities.

21. 10 cm 3 of copper (II) sulphate crystals arestirred into 200 cm

3of water in a measuring

cylinder. When all the crystals have

dissolved, the volume of the solution in the

measuring cylinder is still 200 cm 3. Why?

A Copper (II) sulphate molecules enter the

water molecules.

B Copper (II) sulphate molecules become

smaller when they change from solid to

liquid.

C Water molecules become closer in a

copper (II) sulphate solution.

D Copper (II) sulphate molecules enter the

spaces between the water molecules.

22. Table below shows the different densities offour liquids J, K, L and M. The four liquids

with similar volumes are poured into fourdifferent gas jars. Then a wooden cube with

a length of 3 cm and a mass of 18.9 g is put

into each gas jar. In which liquid will the

wooden cube sink?

Liquid Density (g cm 3

)

J 0.63

K 0.87

L 1.0

M 1.3

23. In cold countries, we see ice floating in theriver or pond because

A ice molecules are smaller than water

molecules

B the molecules of ice are very close to

one another

C the mass of ice becomes less when

water freezes

D the density of ice is less than the density

of water

24. What will happen to the molecules in matterwhen it becomes cold?

I The kinetic energy will decrease

II The number of molecules will become

less

III The molecules will become smaller

25. How do ice and steam molecules differ fromeach other? They have different

I amounts of kinetic energy

II distances between molecules

III molecule sizes

26. Which object will float on a liquid whichhas a density of 1.26 g cm

3?

Object Density (g cm 3

)

I Ice cube 0.90

II Charcoal 1.60

III Glass stopper 2.50

27. Figure below shows three different solids P,Q and R with different masses but with the

same volume. State the arrangement of

density according to ascending order.

28. K, L and M are three liquids which do notmix. Solids P and Q are put inside and the

result is shown in the below figure. State the

arrangement ofK, L,M, P and Q according

to descending order of density.

29. Table below shows the densities of fivedifferent kinds of substances V, W, X, Yand

Z. all the five substances are put into a

cylinder and left for a while. Which of the

following positions is correct for substances

V, W,X, YandZ?


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A C

B D

30. The tyres of a bicycle become deflated afterone week. This is because the air molecules

in the tyres

A have diffused out.

B have become smaller.

C have become less dense.

D have weak forces of attraction betweeneach other.

31. Based on the key, which of the following isa molecule?

I II

III

32. When ice melts,I its molecules become bigger.

II the distance between the molecules is

further apart.

III the kinetic energy of ice molecules

increases.

33. Which of the following statements is trueabout the air molecules when a balloon isbeing blown?

I The air molecules are closer to each

other.

II The rate of collision among air

molecules increases.

III The air molecules in the balloon

become bigger.

34. Which of the following activities does notapply the principle of density?

I Drying fish on the beach

II Floating timber in the river

II Spraying oil onto the surface of water to

kill mosquito larvae

35. Based on the below figure, what will nothappen if all the plants are destroyed?

A The amount of carbon dioxide will

increase

B The amount of oxygen will increase

C The amount of mineral salts will

increase

D Earths temperature will increase

36. Which of the following reactions willseparate the elements in a compound?

A Burning a magnesium tape

B Dissolving sodium hydroxide in water

C Electrolysis of water

D Evaporating a salt solution

37. Which of the following processes can beused to separate the elements in a

compound?

A Sublimation C Distillation

B Electrolysis D Filtration

38. The information given below are the stepsthat should be taken to separate a mixture of

sand, iron filings and common salt. State the

correct sequence when separating the three

substances.

P EvaporateQ Filter

R Dissolve in water

S Use a magnet

39. Figure below shows the classification ofmatter. Which of the following represent X,

YandZ?


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X Y Z

A Ammonia Copper Sulphur

B Sugar Aluminium Iron

C Air Tin Carbon

D Petroleum Zinc Potassium

40. Soil is important to plant because it providesI mineral salts II food

III carbon dioxide

41. Figure below shows the change of state ofwater from the state ofJto the state ofK.J

and K are different states. Which of thefollowing arrangements of particles

representJand K?

State J State K

A

B

C

D

42. Figure below shows the classification ofmatter. Which of the following most

probably representR, Sand T?

R S T

A Non metals Mercury Bromine

B Non metals Bromine Mercury

C Alloys Mercury Bromine

D Alloys Bromine Mercury

43. Which of the following experiments andobservations determine if substances X, Y

andZare compounds or not?

Experiment Observations

I The black

substance sticks to

the magnet and the

yellow substance

remains in the

crucible.

II Lime water turns

cloudy

III Gas P and Q are

collected in the test

tubes.

44. Figure below shows the classification ofmatter. Which of the following examples is

correct for G andH?

G H

A Carbon dioxide Chlorine

B Sodium chloride Copper

C Air Mercury

D Sodium Sulphur


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45. Based on the below figure, why do youthink the candle in beaker M burns for a

longer time than the candle in beakerN?

A There is more carbon dioxide in beaker

Mthan in beakerN

B There is more oxygen in beaker Mthan

in beakerN

C There is more water vapour in beakerM

than in beakerN

D The air pressure in beaker M is higher

than air pressure in beakerN

46.

A burning candle is put inside a gas jar thatcontains exhaled air. Which experiment in

the below figure indicates the correct water

level when the candle is extinguished?

A C

B D

47. Figure below shows the carbon cycle. Namethe processes labelledX, YandZ.

48. Which of the following processes helps tomaintain the amount of oxygen and carbon

dioxide in the atmosphere?

A Transpiration and photosynthesis

B Transpiration and respiration

C Decomposition and transpiration

D Photosynthesis and respiration

49. Figure below shows an experiment to findthe percentage of oxygen used by a burning

candle. When the candle extinguishes, find

the percentage of oxygen used.

50. Three test tubes containing oxygen, carbondioxide and nitrogen are inverted into three

beakers containing pyrogallol solution as

shown in the below figure. After a few

minutes, what will happen to the level of

pyrogallol in test tubesX, YandZ?

X Y Z

A Unchanged Rise Rise

B Unchanged Rise Unchanged

C Rise Unchanged UnchangedD Rise Rise Rise

51. The rise in the temperature of the Earthcaused by increased carbon dioxide levels is

called

A the thinning of the ozone layer

B the greenhouse effect

C air pollution

D a drought

52. Table below shows the different percentagesof gases in normal air and exhaled air. Whatprocess cause the differences in percentage

between the two types of air?

Gas Normal air Exhaled air

Nitrogen 78 % 78 %

Oxygen 21 % 16 %

Carbon dioxide 0.03 % 4 %

Inert gases 1 % 1 %

Water vapour Less More


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53. The pie chart below shows the percentage ofgases P, Q, R, S and T in the atmosphere.

Which statement is true about the percentage

of gases in exhaled air and in normal air?

I The percentage of gas Q in exhaled air

decreases

II The percentage of gas P in exhaled air

is unchanged

III The percentage of gas R in exhaled air

increases

54. Which of the following pairs of pollutantsand effects is not correct?

Pollutant Effect

A Chlorofluorocarbons Thinning of the

ozone layer

B Lead compounds Damage to the

nervous system

C Carbon monoxide Retards the growth of

plants

D Soot Causes respiratory

problems

55. Figure below shows an experiment carriedout by a student. A few tests were done on

the gas that was released. Which of the

following observation(s) about the

experiment is true?

I Water droplets were formed on the

inner surface of the gas jar.

II Lime water which was poured into the

gas jar became cloudy

III Moist blue litmus paper changed to red

56. a) Define volume.b) State the SI unit for volume.

c) Change the following measurements to

cm3.

i) 215 ml ii) 0.95 liter

iii) 0.00005 m3

57. a) State the SI unit for weight.b) Why does the weight of an object vary

in different places?

c) Fill in the chart below.

Kilograms Grams Milligrams

2.5

84

63 000

0.00258

58. List the similarities and differences betweenmass and weight in the chart below.

Mass Weight

Similarities

Differences (Aspects)

Definitions

Measuring

instruments

Values

SI units

59. a) What is microorganism?b) Name four main groups ofmicroorganisms.

60. a) Name the microorganisms labelledA,B,CandD.

b) Which of the microorganisms given by

you in (a) is protozoa?

61. a) Which cell structure is green in colourand can be found in plants?

b) What is the function of this cell?

c) State the function of

i) the nucleus of a cell,

ii) the cytoplasm.


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62. a) State the sequence of cell organizationin a multicellular organism.

b) Name the system that red blood cell

belongs to.

c) Why does our heart beat faster when we

are exercising?

d) If someones brain is injured, what will

happen to him?

63. a) Complete the following chart to showthe similarities, differences and the

functions of the various parts of an

animal and a plant cell.

Animal Plant

Similarities

i)

ii)

iii)

Differences (Aspects)

Shape

Chloroplast

Cell wall

Vacuole

b) State the function for each cell structure

in both animal and plant cells.

64. List 5 systems in the human body. Includethe functions of these systems.

65. a) What is a molecule?b) Why do gases diffuse very fast?

c) Why are solids more difficult tocompress?

66. An experiment is carried out to determinethe densities of a few solids. A lever balance

is used to measure the mass. A measuring

cylinder is used to measure the volume of

the solids. The measurements are recorded

in the below table.

SolidMass

(g)

Volume

(cm3)

Density

(g cm 3

)

Wood 4.8 6

Copper shot 17.8 2Cork 2.1 7

Lead shot 45.2 4

Glass stopper 12.0 4.8

a) Calculate the densities of the solids in

the table.

b) Arrange the solids in ascending order of

density.

c) Which solids will float on water?

d) Why?

e) What conclusion can you make from

this experiment?

67. State the differences and similaritiesbetween solids, liquids and gases based on

the following aspects.

Differences:

i) Particle arrangement

ii) Distance between particles

iii) Volume

iv) Force of attraction between particles

v) Movement of particles

Similarities (State 3)

68. a) What are the basic natural resources inthis world?

b) List three main gases found in theatmosphere and state their percentages.

69. Jamal puts a few cockroaches into a tightlyclosed can. The lid of the can has a few

small holes.

a) Why did Jamal make a few small holes

on the lid of the can?

b) What will happen if there are no holes

on the lid of the can?

c) Why do you say so?

70. Compare the characteristics of mixtures andcompounds. Write their similarities anddifferences.

Similarities: ...

Differences:

i) Energy change

ii) Ratio of components

iii) Substance formed

iv) Method of separation

71. Write the similarities and differences toshow the properties of metallic and non

metallic elements.

Similarities: ...

Differences:i) Surface appearance

ii) Ductility

iii) Malleability

iv) Boiling point

v) Melting point

vi) Electrical conductivity

vii) Heat conductivity


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72. a) Why are the carbon and oxygen cyclesimportant?

b) Why is oxygen important for

respiration?

c) How do plants help to control the

amount of carbon dioxide in the

atmosphere?

d) What causes the amount of carbon

dioxide in the atmosphere to increase?

e) What is the effect of excessive carbon

dioxide levels in the atmosphere?

73. Fill in the properties of oxygen (O2), carbondioxide (CO2) and nitrogen (N2) in the

below table.

O2 CO2 N2

Colour

Odour

Taste

Solubility in water

Solubility in sodium

hydroxide solution

Solubility in pyrogallol

solution

Moist litmus paper

Lime water

Hydrogen carbonate

indicator

Glowing splinter

Burning splinter

Confirmation test


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Answer1. R, P, S, Q 2. 100

3. 76 cm2

4. 0.25 cm3

5. 2.9 cm3

6. Y, W,Z,X

7. C 8. I

9. L,N 10. A

11. D 12. B

13. C 14. C

15. II, III 16. I, II

17. D 18. I, II

19. A 20. B

21. D 22. J

23. D 24. I

25. I, II 26. I

27. Q,R, P 28. M, Q,L, K, P

29. A 30. A

31. I, II 32. II, III

33. I, II 34. I

35. B 36. C

37. B 38. S,R, Q, P

39. A 40. I

41. C 42. A

43. II, III 44. A

45. B 46. B

47. X: photosynthesis; Y: respiration;Z: Burning

48. D

49. 20 % 50. C

51. B 52. Respiration

53. I, II 54. C

55. I, II

56. a) The volume of a matter is the space

occupied by it.

b) Cubic metre (m3)

c) i) 215 ii) 950

iii) 50

57. a) Newtons

b) The weight of an object depends on the

gravitational force of the Earth.

c) i) 2 500, 2 500 000

ii) 0.084, 84 000

iii) 0.063, 63

iv) 2.58, 2 580

58. Similarities: Both are due to the presence of

matter in an object.

Differences

Mass Weight

The amount of matter

in an object

The gravitational force

that acts on an object

Beam, lever, electronic Spring. Compression

Remains the same Depends on the

gravitational force

Kilograms Newtons

59. a) A tiny living thing that cannot be seen

with the naked eyes.

b) virus, bacteria, fungi, protozoa

60. a) A: yeast;B: paramecium;C: amoeba;D: euglena

b) Paramecium, amoeba, euglena

61. a) A chloroplast

b) Contains chlorophyll that is used to

carry out photosynthesis

c) i) Controls all the activities of a cell

ii) Contains dissolved substances such

as protein, minerals, vitamins and

starch

62. a) Cell Tissue Organ System

Organismb) Blood circulatory system

c) To transport more oxygen to every part

of the body

d) Part of or the whole body will become

paralyzed can cannot react to any

stimuli.


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63. Similarities: nucleus, cell membrane,

cytoplasm

Differences:

Animal Plant

Irregular Regular

Absent PresentAbsent Present

None / very small Big

Nucleus Controls all the activities of a cell

Cell

membrane

Controls the movement of

substances in and out of a cell

Cytoplasm The place where chemical

processes take place

Chloroplast Produces chlorophyll

Cell wall Protects and maintains the shape

of a cell

Vacuoles Contains dissolved substances

such as water, minerals and sugar

64. i) Digestive: Digests and absorbs food

ii) Excretory: Remove waste products

iii) Respiratory: Takes in O2 and gives out

CO2

iv) Nervous: Coordinates body activities

and helps to respond to any stimuli

v) Circulatory: Transport O2, CO2, food

and waste products

vi) Skeletal: Supports the body and protects

internal organs.

vii) Reproductive: Reproduces new

generations.

65. a) A molecule is a particle consisting of

two or more atoms that are chemically

combined together.

b) Gas particles are very far apart from one

another. Also the forces of attraction

between the gas particles are very weak.

c) Solid particles are very compact and the

spaces between them are very small.

66. a) Wood: 0.80; Copper shot: 8.90;

Cork: 0.30; Lead shot: 11.3;

Glass stopper: 2.50

b) Cork, wood, glass stopper, copper shot,lead shot

c) Cork and wood

d) The densities of cork and wood are less

than 1 g cm 3

(density of water)

e) Different substances have different

densities.

67. Differences

Solid Liquid Gas

Orderly Not orderly Very disorderly

Close Far Very far

Definite DefiniteIndefinite, depending

on the containerStrong Moderate Weak

Not free Free Very free

Similarities:

i) Made up of particles

ii) Occupies space

iii) Has volume

68. a) Air, water, soil

b) i) O2: 21 % ii) CO2: 0.03 %

iii) N2: 78 %

69. a) So that the cockroaches can breathe.

b) All the cockroaches will die after some

time.

c) Cockroaches need oxygen to live.

70. Similarities: Both consists of two or more

different substances.

Differences:

Compound Mixtures

Absorbs or releases

energy during its

formation

No energy is absorbed

or released during its

formation

Fixed Not fixed

New substance formed

which is different from

the original substance

No new substance in

formed

Chemically Physically

71. Similarities: Consists of only one kind of

atom

Differences:

Metallic Non metallic

Shiny Dull

Ductile Non ductile

Malleable Not malleable (brittle)

High Low

High Low

Good electrical

conductors

Electrical insulator

except carbon

Good Poor


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72. a) To control the composition of gases in

the air

b) Because cells need it for respiration

c) By carrying out photosynthesis

d) The burning of rubbish and fuels by

motor vehicles, factories and power

stations.

e) The temperature of the Earth will rise.

This is called the greenhouse effect.

73. Properties of O2, CO2, and N2

O2 CO2 N2

Colourless Colourless Colourless

Odourless Odourless Odourless

Tasteless Slightly sour Tasteless

Slightly soluble Soluble Insoluble

Insoluble Very soluble Insoluble

Very soluble Insoluble Insoluble

Unchanged Blue red Unchanged

Unchanged Cloudy Unchanged

Unchanged Red yellow Unchanged

Rekindles Extinguished Extinguished

Burns brighter Extinguished Extinguished

Rekindles a

glowing

wooden splinter

Turns lime

water cloudy

mid test set 4

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