UPDATED WASSCE SYLLABUS FOR INTEGRATED SCIENCE AND DOCS FOR TEACHING INT. SCIENCE
Integrated Science : Active Transport, Diffusion, Osmosis, Practical Lesson SHS
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The integrated science papers are ;
Paper 1 Objectives
Paper 2 theory
Paper 3 Practical’s.
Students were asked to answer the questions on the Question paper.
You’ll be required to answer Four Questions only.
Duration is usually 1 1/2 hours for the Paper 2.
2022 examination past questions and answers integrated science
1. (a) (i) Name three substances that are excreted from human body
(ii) Name two organs in humans which perform excretory functions
(b) (i) what is grafting as used in crop production?
(ii) State three benefits of Grafting
(c) (i) Two ways in which scientific methods is important
(ii) Give one reason for each of the following
a0 Do not wear rubber slippers to The laboratory
b0 Close all tabs before leaving the laboratory
c0 Spell liquids must be clean immediately
(d) (i) Explain briefly the term earthing as used in household wiring
(ii) Name two sources of electric power generation
Answers
1. (a) (i) Three substances that are excreted from human body
Carbon dioxide
Salt
Bile pigment
Urea
(ii) Two organs in humans which perform excretory functions.
Liver
Skin
Lungs
Kidneys.
(b) (i) Grafting as used in crop production?
Grafting is a process in which part of different plants known as the shoot or Scion is connected or joined to another plant of the same species known as the stock to grow as one plant
(ii) Three benefits of Grafting
Can be done under any weather condition
Easy method of Multiplication of plants
Can be use to produce varities of the same plant
Early Maturity
(c) (i) Two ways in which scientific methods is important
Helps to identify Problems
Provides logical procedure at drawing valid conclusions
(ii) one reason for each of the following
a0 Do not wear rubber slippers to The laboratory
To avoid slipping that may cause damage or hurt
b0 Close all tabs before leaving the laboratory
To Avoid flooding with water.
c0 Spill liquids must be clean immediately
To Avoid slipping
(d) (i) Explain briefly the term earthing as used in household wiring
It is the transfer of electrical charges from the atmosphere directly to the earth through a wire buried in the ground.
(ii) Two sources of electric power generation
Solar, Wind, Biogas , Nuclear, Hydro/water , Diesel
Question 2
2. (a) (i) Give four reasons why farmers should be discouraged from using chemical fertilizers
(b) (i) what is temporary hard water?
(ii) Write a chemical equation to show how the Temporary hard water can be softened by heating.
(c) (i) What is lever
(ii)Explain each of the following terms as applied to simple machines
a0 Mechanical advantage
b0 Velocity ratio
(d) (i) what is food processing
(ii) State
a0 two advantages of food processing
b0 One disadvantage of food processing
Answers
seekersnewsgh
2. (a) (i) Four reasons why farmers should be discouraged from using chemical fertilizers
Are harmful to soil living organism
They are expensive
It increases the acidity of the soil
It can cause food poisoning
They are easily leached
(b) (i) Temporary hard water
This is the hardness of water caused by hydrogen carbonates (bicarbonates) of calcium and magnesium pg 37 Integrated science for senior high schools 2. gov text books.
(ii) Write a chemical equation to show how the Temporary hard water can be softened by heating.
Ca(HCO3)2 – CaCO3 + CO2 + H2O or Mg(HCO3)2 – heat – MgCO3 + CO2 + H2O
(c) (i) lever
Is a rigid bar which moves freely around a Pivot.
(ii) a0 Mechanical advantage
Mechanical Advantage is the ratio of the loan to the effort applied to the machine.
b0 Velocity ratio
Is the ratio distance moved by the effort to the distance moved by the load.
(d) (i) Food processing
Is the chemical operations on food in order to preserve it.
(ii) a0 two advantages of food processing
Increases the commercial value of food
improves the shelf life of food products
Makes food available for easy marketing
Allows the addition of food nutrients to improve it quality
b0 One disadvantage of food processing
Loss of nutrient
Food may not taste well
Frequent intake may lead to serious health issues.
Question 3
3. (a) (i) Mention three benefit that Ghana could derived from nuclear energy.
(ii) List two types of nuclear radiation
(b) State the scientific principle involved in each of the following local industry
a0 Kenkey production
b0 Soap production
c0 Salt production
d0 Vegetable oil production
e0 Gari processing
(c) (i) list two micronutrients in the soil
(ii) Differentiate between broadcasting and side dressing method of fertilizer application
(d) (i) Differentiate between conductors and semiconductors
(ii) Name two appliances in a home which use semiconductors
Answers
3. (a) (i) Three benefit that Ghana could derived from nuclear energy.
Generation of Electricity
For the treatment of Cancer
For Research
For the Production of nuclear weapons
(ii) Two types of nuclear radiation
Alpha particles
Beta Particles
Gamma rays
(b) scientific principle involved in each of the following local industry
a0 Kenkey production Fermentation
b0 Soap production Saponification
c0 Salt production Evaporation
d0 Vegetable oil production Fermentation / Chemical extraction
e0 Gari processing Fermentation / Evaporation
(c) (i) Two micronutrients in the soil
Chloride
Iron
Boron
Copper
Nickel
(ii) Difference between broadcasting and side dressing method of fertilizer application
Broadcasting methods of fertiizer application involved the use of hand to spread the fertilizer over the soil Whilst side dressing is when the fertilizer is placed in one particular spot near the plant or the the roots of grain crops
(d) (i) Difference between conductors and semiconductors
Conductors are materials which allow electrons to pass through them (seekersnewsgh) Whilst Semi-conductors are solid materials which electrons are held in covalent bond or materials whose conductivity lies between conductors and insulators.
(ii) Name two appliances in a home which use semiconductors
Solar panel
LED Bulbs
Microwave
Central Processing Unit CPU
Washing Machines
Radio Sets
TV sets
Question 4
4. (a) (i) state three conditions to be considered when selecting viable seeds for planting
(ii) State two characteristics of good seeds
(b) (i) state ohm’s law
(ii) A resistor has a resistance of 12.5 ohms. If a current of 10 Amperes passes through the resistor, calculate the potential difference across a resistor.
(c) (i) Differentiate between a pandemic and an an epidemic
(ii) state two roles of the world health organisation (seekersnewsgh) in a management of the COVID-19 disease
(d) (i) Name two instrument used for measuring the volume of liquids accurately
(ii) Give three reasons why a crate measurement is necessary
Answers
4. (a) (i) Three conditions to be considered when selecting viable seeds for planting
Cost of Seed
Desired Colour
Moisture content of the seed
Seed must be free from infection
only whole seed must be selected
(ii) Two characteristics of Good seeds
Free from Dirt
Disease Free
Free from Pest
Free from holes
(b) (i) Ohm’s law
States that the current flowing through a conductor is directly proportional to the potential difference across the conductor, provided the temperature and other physical properties remains constant.
(ii) A resistor has a resistance of 12.5 ohms. If a current of 10 Amperes passes through the resistor, calculate the potential difference across a resistor.
V = IR
V = 10 x 12.5
V = 125V
(c) (i) Difference between a pandemic and an an epidemic
Pandemic is a disease occurring world wide over wide area crossing international boundaries which usually effects a large number of people Whilst Epidemic is a disease that affects a large number of people within a community or population/region.
(ii) Two roles of the world health organisation in a management of the COVID-19 disease
Establishes a Respond fund
Research
Distribute very important medical supplies
Provide education on the disease
Advices countries on critical interventions
(d) (i) Two instrument used for measuring the volume of liquids accurately
Pipette
Burette
Volumetric Flask
Calibrated Beaker
(ii) Three reasons why a crate measurement is necessary
To prevent cheating
To prevent Wastage
To avoid error
Avoid over dose and under dose of medicine
Question 5
5. (a) (i) Give three examples of endoparasites of cattle
(ii) Enumerate two method of controlling pest of cattle
(b) (i) What is a formula mass of a compound?
(ii) An atom Q has 12 neutrons and 11 protons
a0 Calculate its mass number
b0 Write its electron configuration
c0 What type of ion will Q for me no compound
(c) (i) state two ways by which humans could be protected from harmful effects of radioactivity
(ii) Give three uses of radioisotopes
a0 Do not wear rubber slippers to The laboratory
b0 Close all tabs before leaving the laboratory
c0 Spell liquids must be clean immediately
(d) State five effects of climate change on humans
Answers
5. (a) (i) Three examples of Endoparasites of cattle
Tapeworm
Liver Flukes
Round worm
Pin Worm
(ii) Two method of controlling pest of cattle
Dipping / Oral method
Hand picking
Quarantine
Good Farm sanitation
Using recommended repellants
(b) (i)Formula mass of a compound?
Integrated Science : Active Transport, Diffusion, Osmosis, Practical Lesson SHS
It is the sum of relative atomic mass of atoms that constitute a chemical formula
(ii) An atom Q has 12 neutrons and 11 protons
Number of protons + number of neutrons = 11 + 12 = 23
b0 Write its electron configuration
2, 8, 1
c0 Type of ion will Q form in a compound
Cation
(c) (i) Two ways by which humans could be protected from harmful effects of radioactivity.
Minimize time of exposure
Move far away from source of radiation
By using protective clothing
(ii) Three uses of radioisotopes
For food preservation
Pest Control
Crop improvement
Sterilization of equipment
Use as a fuel in nuclear reactor
To establish ages of various objects
(d) Five effects of climate change on humans
Change in rainfall affects farming /food availability
It can lead to shortage of food /rise in hunger
River overflow their banks affecting crops
Frequent flooding displaces people
Drought can lead to scarcity of water for humans.
It leads to hotter or warmer temperature which increases heat related illness
Question 6
seekersnewsgh
6. (a) (i) What are alkanoates ?
(ii) state three uses of alkanoates
(b) (i) Explain the term weathering
(ii) State three ways of maintaining soil fertility on a sloppy land
(c) (i) Give two reasons why genetic variation is important in living organisms
(ii) Give three examples of genetic variations in humans
(d) (i) State Archimedes principles
(ii) A box of volume 200 M3 float on Sea water of density 10.30 kg per cubic metre.
Calculate the Upthrust of the sea water on the boat [g = 10 ms-2 ] Name two sources of electric power generation
Answers
seekersnewsgh
6. (a) (i) What are alkanoates ?
They are products /esters / salts formed when an organic acid reacts with an alcohol
(ii) State three uses of alkanoates
Use as perfume
use as solvent
Use in the production of plastics / Polymers
Use in making glycerol
(b) (i) Explain the term weathering
Is the breakdown of rocks into smaller into smaller particles to form soil.
(ii) Three ways of maintaining soil fertility on a sloppy land
Cover cropping
Strip Cropping
Terracing
Countour ploughing
Land rotation
(c) (i) Two reasons why genetic variation is important in living organisms
Prevents extinction of species
Helps in disease resistance in organism
It ensures the survival of the species
(ii) Three examples of genetic variations in humans
Skin colour
Hair Colour
Blood type
Baldness
Sickling
Dimples
Colour blindness
Albinism
Height
Rhesus factor
(d) (i) State Archimedes principles
A body wholly or partially immersed in a fluid experiences an upward force called upthrust which is equal to the weight of fluid displaced.
(ii) A box of volume 200 cubic metre float on Sea water of density 10.30 kg per cubic metre.
Calculate the Upthrust of the sea water on the boat [g = 10 metre per second squared ]
Upthrust = Volume x density x gravity
Upthrust =200 x 10.30 x 10
Upthrust = 20, 600 N
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