KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
The most appropriate to adopt when growing vegetables in the dry season is
A.
watering.
B.
transplanting.
C.
pest control.
D.
fertilizer application.
Answer: A
2.
The planet in our solar system which has the largest orbit is
A.
Jupiter.
B.
Mars.
C.
Pluto.
D.
Venus.
Answer: C
3.
Which of the following agencies is responsible for providing information on the weather and climate conditions of an area?
A.
Animal Husbandry Department
B.
Extension Services Department
C.
Information Services Department
D.
Meteorological Services Department
Answer: D
4.
Which of the following statements about pressure in liquids is/are correct?
I. Pressure in liquids at the same level acts equally in all directions.
II. Pressure in liquids depend on the area of the liquid.
III. Pressure in liquids decreases with depth.
A.
I only
B.
II only
C.
I and III only
D.
I, II and III
Answer: A
Pascal's law states that pressure in liquids is transmitted equally in all directions.
Pressure in liquids does not depend on the surface area.
The pressure exerted by a liquid increases with depth.
5.
A fuse is connected in an electric circuit to
A.
prevent electric shock.
B.
increase the current.
C.
prevent current from increasing.
D.
increase the heat generated.
Answer: C
A fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. It is designed to melt and separate in the event of excessive current thereby stopping or interrupting the current.
6.
By what process is heat transferred from the bottom of a beaker containing water to the top?
A.
convection
B.
conduction
C.
radiation
D.
absorption
E.
transmission
Answer: A
7.
The male and female sex cells of a plant are respectively in the
A.
Sperm and egg
B.
Pollen grain and ovary
C.
Sperm and ovary
D.
Ovary and ovule
E.
Embryo and seed
Answer: B
8.
Which of the following characteristics applies to only plants?
A.
Excretion of waste materials
B.
Response to stimuli
C.
Ability to manufacture food from simple substances
D.
Ability to respire
Answer: C
9.
In which part of the digestive system of a fowl does grinding of feed take place?
A.
Crop
B.
Gizzard
C.
Oesophagus
D.
Proventriculus
Answer: B
10.
Which of the following statements about all living things is/are true?
I. They respire
II. They manufacture their own food
III. They grow
A.
I only
B.
II only
C.
I and II only
D.
I and III only
E.
II and III only
Answer: D
Only plants manufacture their own food.
11.
The humidity of the atmosphere is measured with
A.
an anemometer.
B.
a barometer.
C.
a hygrometer.
D.
a hydrometer.
Answer: C
Anemometer → Wind Speed
Barometer → Atmospheric Pressure
Hygrometer → Humidity
Hydrometer → Density of liquids
12.
The component of the soil which is made up of the finest particle is
A.
clay.
B.
humus.
C.
loam.
D.
sand.
Answer: A
13.
The two main particles in the nucleus of an atom are
A.
neutrons and protons.
B.
neutrons and electrons.
C.
shells and neutrons.
D.
electrons and protons.
Answer: A
14.
The angle between an incident ray and a reflecting surface is 20o. Determine the angle of reflection.
A.
60o
B.
70o
C.
90o
D.
110o
Answer: B
20o + i = 90o
i = r
Where i= angle of incidence and r = angle of reflection.
20o + i = 90o
i = 90 - 20
i = 70o
i = r = 70o
15.
Which of the following methods of preserving food makes use of heat energy from the sun?
A.
Drying
B.
Frying
C.
Salting
D.
Refrigeration
Answer: A
16.
Which of the following activities is a reflex action?
A.
Eating
B.
Fighting
C.
Learning
D.
Sneezing
E.
Writing
Answer: D
Reflex action is a sudden and involuntary response to stimuli. It helps organisms to quickly adapt to an adverse circumstance that could have the potential to cause bodily harm or even death. Pulling our hands away immediately after touching a hot or cold object is a classic example of a reflex action.
17.
Power is defined as the rate at which
A.
energy is used.
B.
temperature rises.
C.
a body travels.
D.
a body cools down.
Answer: A
Power =
18.
The force which pulls all objects towards the centre of the earth is the
A.
frictional force.
B.
electrostatic force.
C.
gravitational force.
D.
rotational force.
Answer: C
19.
Which of the following is a horizontal underground stem?
A.
Cocoyam
B.
Onion
C.
Carrot
D.
Yam
E.
Ginger
Answer: E
20.
An object weighing 60 N is dragged through a distance of 2 m. Calculate the work done
A.
6 J
B.
15 J
C.
30 J
D.
120 J
E.
1200 J
Answer: D
21.
In which of the following vegetation of Ghana does millet and sorghum grow well?
A.
Costal savannah
B.
Forest zone
C.
Guinea savannah
D.
Transition zone
Answer: C
22.
The darkest part of a shadow formed during an eclipse is called
A.
Lunar eclipse
B.
Annular eclipse
C.
Penumbra
D.
Umbra
E.
Solar eclipse
Answer: D
23.
When the testa of a soaked bean is removed, the seed is seen to be made up of mainly
A.
micropyles
B.
hilum
C.
radicle
D.
embryo
E.
cotyledons
Answer: E
24.
Which of the following methods protects pure iron from rusting by coating with zinc?
A.
Alloying
B.
Galvanizing
C.
Greasing
D.
Painting
Answer: B
25.
The heavenly body that produces and emits its own light is
A.
Mars.
B.
meteorite.
C.
the moon.
D.
the sun.
E.
Venus.
Answer: D
26.
Most machines waste energy because of
A.
old age
B.
force
C.
friction
D.
load
E.
too much effort
Answer: C
27.
Which of the following forces will cause an object to move in a circular path?
A.
Centripetal force
B.
Gravitational force
C.
Inertial force
D.
Reaction force
E.
Tensional force
Answer: A
28.
When the north poles of two magnets are brought together they
A.
attract each other.
B.
repel each other.
C.
first attract and then repel each other.
D.
have no effect on each other.
Answer: B
When two north poles are approached together, the magnetic field lines repel each other and the two magnets experience a repulsive force. The same occurs if two south poles are approached together.
Like poles repel each other
29.
The scent of a perfume sprayed at one corner of a room fills the entire room through
A.
conduction.
B.
diffusion.
C.
osmosis.
D.
radiation.
Answer: B
Diffusion is the net passive movement of molecules or particles from regions of higher to regions of lower concentration.
At the corner of the room where the perfume was sprayed, the concentration was higher and the molecules moved from that region to the region where the concentration was lower.
30.
Which of the following statements about plants is true?
I. Most plants show movement
II. Green plants manufacture their own food
III. All animals depend directly on plants for food
A.
I only
B.
II only
C.
III only
D.
I and II only
E.
II and III only
Answer: B
31.
Which of the following structures takes part in human digestion?
A.
Caecum
B.
Kidney
C.
Larynx
D.
Pancreas
Answer: A
32.
Which of the following substances is a non-metal?
A.
Diamond
B.
Mercury
C.
Sodium
D.
Steel
Answer: B
33.
Which of the following structures regulate the amount of light that enters the eye?
A.
Choroid
B.
Cornea
C.
Iris
D.
Lens
E.
Retina
Answer: C
34.
Droplet infection is the method by which
A.
disease are transmitted from animals to plants.
B.
infected animals are processed.
C.
human beings protects themselves from diseases.
D.
diseases are spread through the air.
Answer: D
35.
Digestion of protein starts in the
A.
duodenum
B.
gullet
C.
mouth
D.
small intestine
E.
stomach
Answer: E
36.
The function of the white blood cells in humans is to
A.
produce haemoglobin.
B.
produce digestive enzymes.
C.
ensure blood clot during an injury.
D.
produce antibodies to fight disease causing organisms.
Answer: D
37.
The second large in the life cycle of a mosquito is the
A.
egg.
B.
imago.
C.
larva.
D.
pupa.
Answer: C
38.
The equation Carbon (IV) oxide + water → Glucose + Oxygen, represents
A.
Breathing
B.
Diffusion
C.
Photosynthesis
D.
Respiration
E.
Transpiration
Answer: C
39.
The figure below is a diagram of a fish.
Use it to answer the question below.
The function of the part labelled IV is to enable the fish to
A.
sink in water.
B.
absorb oxygen from the water.
C.
protect itself from attack.
D.
detect smell in water.
Answer: B
40.
The dry season in Ghana is mainly from
A.
January to March
B.
April to June
C.
July to September
D.
October to December
Answer: A
The dry season is the period where there is very little or no rainfall. In the southern part of Ghana, the dry season occurs between November to February. The period is much longer in the Northern part which occurs between November to June.
THEORY QUESTIONS
1.
(a)
List in the correct order, the organs through which food passes from the mouth to the anus.
(b)
State the components of a balanced ration for feeding poultry.
(c)
Predict the products formed when:
(i)
magnesium solution reacts with dilute hydrochloric acid;
(ii)
potassium reacts with water.
(d)
(i)
State two effects of heat on a substance.
(ii)
Potassium permangante crystals are dropped into a beaker of water and warmed:
(α)
State what would be observed;
(β)
State the phenomenon demonstrated in (α).
(a)
Order of food passes from the mouth to the anus
Mouth → oesophagus → stomach → small intestine → large intestine → anus
(b)
Components of a balanced ration
1. Carbohydrates
2. Protein
3. Fats and oil
4. Minerals
5. Vitamins
6. Water
(c)
Products formed
(i)
Magnesium chloride and hydrogen/MgCl2 and H2
Illustration
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
(ii)
Potassium hydroxide and hydrogen/KOH and H2
Illustration
2K(s) + 2H2O → 2KOH(aq) + H2(g)
(d)
(i)
Effects of heat on a substance
1. Change of state/melts/vapourises
2. Expansion/contraction/change in shape
3. Increasing temperature/decreasing temperature
4. Increase in pressure
(ii)
Potassium permangante crystals dropped into a beaker of water and warmed:
(α)
Warmed coloured water moves from the bottom of the beaker upwards
The solution turns to purple in color because of a process called diffusion.
Diffusion is the movement of molecules or atoms from high concentrated region to low concentrated region.
(β)
Phenomenon demonstrated
Heat transfer by convection/ Diffusion
2.
a)
A body of mass 100kg is raised to a height of 2m above the ground.
i)
State the name of the energy possessed by the object by reason of the new position.
ii)
Calculate the value of this energy. [g=10ms-2]
b)
i)
What is matter?
ii)
State two of the states of matter.
c)
i)
Describe the nature of a loamy soil.
ii)
Name any two plants nutrients.
d)
i)
State the causative organism for each of the following diseases:
α)
cholera;
β)
tuberculosis.
ii)
State one method of prevention of cholera.
a)
i)
Potential Energy
ii)
Potential Energy = Mass x Acceleration due to gravity (g) x Height
P.E = m x g x h = mgh
Mass = 100 kg, g = 10 m-2, height = 2 m
Potential Energy = 100 x 10 x 2 = 2000 J
b)
i)
Matter is anything that has mass/weight and can occupy space.
ii)
States of matter
1. Solid
2. Liquid
3. Gas
4. Plasma
c)
i)
Nature of loamy Soil
Contains roughly equal quantities of sand, silt and clay and large amount of humus/organic matter or nutrient
ii)
Plant Nutrients
1. Nitrogen
2. Phosphorus
3. Potassium
4. Calcium
5. Magnesium
6. Sulphur
7. Zinc
8. Iron
9. Copper
10. Boron
11. Manganese
12. Molybdenum
d)
i)
Causative organism for cholera & Tubercolosis
α)
Cholera → Bacteria/ bacteria/ Vibrio Cholera
β)
Tubercolosis → T.B germ/ Tubercle Bacillus bacteria/ Mycobacterium
ii)
Prevention of cholera
1. Washing of hands under running water with soap before eating or after visiting the toilet
2. Boiling of water before drinking/ Drinking treated water
3. Proper disposal of faeces
4. Eating food hot
5. Keeping the environment clean
3.
(a)
State two important components each of the soils that helps:
(i)
Crops to grow well;
(ii)
To maintain good soil structure.
(b)
(i)
Explain how energy in a windmill is obtained
(ii)
State one source of renewable energy.
(c)
(i)
Explain why steel is preferred to iron in building construction.
(ii)
State two ways of preventing rusting.
(d)
State three ways of preventing indigestion.
(a)
Important components of the soils that helps
(i)
Crops to grow well
1. Nutrients/humus
2. Air/living organisms
3. Water
(ii)
To maintain good soil structure
1. Soil particles
2. Organic matter/humus
3. Living organisms
(b)
(i)
How energy in a windmill is obtained
When the wind blows, the windmill turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity (energy).
(ii)
Sources of renewable energy
1. Sun
2. Wind
3. Water/hydropower
4. Biomass
5. Tides
6. Geothermal source/heat from the ground
(c)
(i)
Why steel is preferred to iron in building construction
Steel is preferred to iron because it has higher resistance to corrosion (rusting) than steel and has a high tensile strength
(ii)
Ways of preventing rusting
1. Painting
2. Plating or galvanizing
3. Alloying
4. Greasing or oiling
5. Keeping metal at dry place
6. Cathodic protection
(d)
Ways of preventing indigestion
1. Avoid eating late
2. Avoid eating acidic foods
3. Avoid sleeping immediately after meal
4. Chewing food properly
5. Avoid spicy food
6. Avoid eating at regular intervals
7. Avoid eating too much food at a time/eat small food at a time
8. Limit food or drinks that contain caffeine
9. Quit smoking
10. Drink beverages after meal and not during meals
4.
(a)
(i)
Name the stages in the life cycle of a mosquito.
(ii)
Name the stage at which feeding does not take place.
(b)
Explain briefly why air is regarded as a mixture.
(c)
(i)
What is a magnetic pole?
(ii)
State two uses of temporary magenets.
(d)
Give four reasons for planting crops in rows.
(a)
(i)
Stages in the life-cycle of a mosquito
1. Egg
2. Larva
3. Pupa
4. Adult
(ii)
Stage at which feeding does not take place
Pupa
(b)
Why air is considered as a mixture
Contains different elements which are physically combined.
Consist of different substances which can be separated by physical means/methods
(c)
(i)
Magnetic pole
Point/area on a magnet where the magnetic force is greatest or where all lines of force appear to enter.
(ii)
Uses of temporary magenets
1. Loudspeaker
2. Electric bell
3. Telephone earpiece
4. Generators/electric motors
(d)
Reasons for planting crops in rows
1. Facilitate easy movement on the farm
2. It improves drainage
3. It's easy to replace ungerminated seeds
4. It keeps plant roots evenly spaced
5. Enable larger plant population per unit of plot
6. Easy to know plant population on the farm
7. Better access to sunlight
8. For easy control of pest
9. For easy control of diseases
10. Allow free movement of air
5.
a)
Write the systematic name for each of the following compounds.
i)
H2O;
ii)
MgO;
iii)
CaO;
iv)
CaCl2.
b)
Name the instrument used in measuring the following:
i)
Length of a rope;
ii)
Mass of a stone;
iii)
Temperature of a liquid;
iv)
Volume of a liquid.
c)
List three factors that influence vegetable crop production.
d)
Name four stages in the cycle of a flowering plant.
a)
Systematic names
i)
H2O → Water/dihydrogen monoxide/hydrogen oxide
ii)
MgO → Magnesium oxide
iii)
CaCO → Calcium oxide
iv)
CaCl2 → Calcium chloride
b)
Measuring instruments
i)
Length of a rope → Metre rule/tape measure/ruler/surveyor's tape
ii)
Mass of a stone → Beam balance/chemical balance/top pan balance/electronic balance
iii)
Temperature of a liquid → Thermometer
iv)
Volume of a liquid → Volumetric flask/pipette/graduated cylinder/measuring cylinder/burette/graduated beaker
c)
Factors that influence vegetable crop production
1. Slope of land/topography
2. Water/water supply or quality
3. Crop/variety selection
4. Market development
5. Soil type/quality/fertile soil
6. Method of propagation
7. Cultural practices(or any named cultural practice)
8. Harvesting
9. Weather conditions
10. Storage
11. Disease (control)
12. Processing
d)
Stages in the cycle of a flowering plant
1. Seed/fruit formation
2. Germination
3. Reproduction
4. Pollination
5. Seed spreading/dispersal
6. Flowering
7. Fertilization
8. Maturation of fruit or Seed
9. Seedling
10. Growth/maturation/matured plant
6.
a)
Explain briefly why a tomato plant is likely to wilt if too much fertilizer is applied.
b)
State the dangers involved in each of the following activities in the laboratory:
i)
eating or drinking water in the laboratory;
ii)
walking barefooted;
iii)
washing hands with unknown liquid in a beaker.
c)
A child is found not to be able to see at night.
i)
What deficiency disease may the child be suffering from?
ii)
What food nutrient is the child lacking?
iii)
State three source of food substances that can provide the nutrient that the child lacks.
d)
i)
What is a force?
ii)
Explain briefly why a driver could not stop a car on a slippery section of a road when he applied the brake.
a)
Why tomato plant wilts if too much fertilizer is applied
The solution in the fertilizer become more concentrated than that of the plant when the fertilizer is too much.
Osmosis then occurs (water moves from the plant to the solution in the fertilizer with the higher concentration to equalize the concentration) making the plant to lose water.
b)
i)
Dangers for eating or drinking water in the laboratory
Food/water may be contaminated with poisonous substance which will be harmful to the person when eaten or drank
ii)
Dangers for walking barefooted in the laboratory
A person may be pricked with pieces of broken glasses, pins or slip or get burnt.
iii)
Dangers for washing hands with unknown liquid in a beaker
The liquid may be acidic or corrosive which can cause burns/irritation/injury or harm the person.
c)
i)
Disease for not able to see at night
Night blindness
ii)
Night blindness is caused by difficiency of vitamin A
iii)
Vitamin A food substances
1. Leafy green vegetables such as spinach, orange and yellow vegetables such as carrots or sweet potatoes
2. Tomatoes
3. Mango/Orange/Fruits
4. Beef liver
5. Fish oils
6. Milk
7. Eggs
d)
i)
Force is a push or a pull or that which changes a body's state of rest or uniform motion in a straight line
ii)
Why brake fails on a slippery road
Because there is no friction between the tyres and the road.