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WorksheetsScience Practice
Total questions: 25
Worksheet time: 25mins
Objects with equal masses but different densities means ...
have different shapes
have different volumes
have different weights
have different states of matter
None of the above
What is the meaning of balanced diet?
The food taken by an individual according to his appetite.
The food that can help an individual to resist disease.
The food that provides energy to maintain an individual physical activities.
None of the above.
The food that contains sufficient proportion of all classes of food
Which of the following characteristics indicate physical change of substance?
The change is irreversible
Heat and light are released
No new substances are formed
Involves a lot of energy change
None of the above
Water takes a shorter time to boil on the mountain top compared to in the valley although the same electric kettle is used. This is because of ...
the air on the mountain top is less damp
the mountain top is cooler than the valley
the atmospheric pressure is higher in the valley
the rate of heat loss is faster on the mountain top
None of the above.
The efficiency of devices are normally less than 100%. The energy loss is normally in the form of ....
Sound
Light
Magnetism
Heat
None of the above
What is the optimum temperature for the growth of bacteria that cause human disease?
0°C
25°C
37°C
60°C
None of the above
What is the purpose of food processing?
Thickens the food
Extend food shelf-life
Increase the quantity of food
Increase the oxidation of food
None of the above
Diagram above shows some products made of synthetic rubber.
Which of the following is the characteristic of the products?
Can withstand heat and high temperature
Good electric conductor
Dissolve in water
Easily burn
None of the above
What is the purpose of a male peacock showing its colourful tail?
To attract its mate
To camouflage
To warn enemies
To attract its prey
None of the above
Which of the following organisms is located at the second trophic level in the pyramid of numbers?
Grass
Grasshopper
Eagle
Snake
None of the above
Which characteristic is affected by environmental factors?
Ability to roll tongue
Intelligence
Type of blood group
Pattern of fingerprints
None of the above
Diagram above shows the burning of paper.
What is the type of change?
Instant change
Color change
Physical change
Chemical change
None of the above
Why do poisonous frogs have bright colours on their bodies?
As protection
For camouflage
To attract a mate
As a warning sign
None of the above
The following information describes a method of food processing.
The food is heated at 72°C for 15 seconds, followed by immediate cooling and packaging. Most of the nutrients and the natural flavour of food are maintained. Which of the following food is processed using the method?
Meat
Seafood
Fruit juice
Milk powder
None of the above
What is the effect of insufficient intake of fibre in a person’s daily diet?
Indigestion
Dehydration
Constipation
Gastric ulcer
None of the above
Which colour of light is scattered the most at noon?
Red
Blue
Violet
Orange
None of the above
Which of the following food chains is correct?
Nectar-Butterflies-Birds-Snake
Nectar-Birds-Butterflies-Snake
Snake-Birds-Butterflies-Nectar
Nectar-Snake-Butterflies-Birds
Snake-Butterflies-Nectar-Birds
An object moves at a constant velocity on the surface of a floor. What can be said about the object or the surface of the floor?
No force is acting on the object.
The force acting on the object is equal to the opposing frictional force on the object.
The surface is a smooth surface.
The floor is inclined.
None of the above.
A person who is healthy will experience food poisoning if ingested food which is not fresh although food has been cooked properly. What is the factor that causes this to happens?
The bacteria could not be killed by heat.
Bacteria have became immune to the heat.
The bacteria produce toxins that cannot be destroyed by heat.
The bacteria multiply in the food.
None of the above
Which of the following is not a method that can be used to reduce environmental pollution problems?
Recycle paper materials.
The use of forest areas for agricultural activities.
Reducing the use of petroleum.
The use of renewable energy sources.
None of the above
Which of the following factors determine the energy requirement by a person?
I Age
II Sex
III Occupation
IV Size of body
V Weight of body
I, II and III
I, III and IV
I, II and IV
II, III and IV
I, II, III, IV and V
The following information shows the effects of pollution on the environment. Acid rain Global warming. What is the source of the pollution?
Agricultural waste
Radioactive waste
Burning fossil fuels
Industrial toxic waste
None of the above
Radioactive residues must be handled with great caution because their rays ...
easily burned
can destroy living cells
can cause water pollution
can cause air pollution
None of the above
Which of the following is the natural method to control pests at a farm without polluting the environment?
Vector control
Fertiliser control
Biological control
Insecticide control
None of the above
Diagram above shows a food pyramid. S R Q P. Which are most probably the examples of food levels P, Q, R and S?
P=Vegetables, Q=Cereals, R=Meats, S=Fats
P=Cereals, Q=Fruits, R=Beans, S=Sugar
P=Beans, Q= Cereals, R= Vegetables, S=Cheese
P=Chickens, Q=Sweets, R=Vegetables, S= Sugar
P=Chickens, Q=Sweets, R=Cereals, S=Fruits
