KCSE HOME SCIENCE QUESTIONS AND ANSWERS

Explain four practices necessary for maintaining healthy teeth.

2/6/2020

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Explain four practices necessary for maintaining healthy teeth.

visit the dentist for dental check up to ensure any problem is taken care of promptly
discourage the use of sharp objects to remove food from in-between the teeth to avoid damaging the gums
brush the teeth regularly - preferably at night before going to bed and in the morning to avoid build up of plaque
eat a balanced diet with plenty of calcium and phosphorous to promote growth of well formed strong teeth
avoid eating sweet things after cleaning teeth and especially before going to bed to prevent decay/weakening of the teeth
eat hard foods occasionally to exercise your jaws and to strengthen your teeth.
floss the teeth regularly to keep away food particles.

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Giving two reasons in each case, identify a method of lighting each of the following rooms;Study room,Living sitting room,

2/6/2020

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Giving two reasons in each case, identify a method of lighting each of the following rooms;Study room,Living sitting room,

Study room
Direct

the light source is of the correct intensity as it avoids glare which may strain the eyes
the light is distributed downwards hence does not cast shadow.

Living Sitting room
Decorative

the light enhances beauty of interesting art objects/pictures. designs
create/reflects different moods in the home

Semi-direct

light is distributed evenly in all directions
less intense, therefore suitable for general activities
intensity of light can be controlled such as by use of adjustable pendent
(which can be lowered or raised).

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Outline the procedure of daily cleaning a baby’s bedroom.

2/6/2020

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Outline the procedure of daily cleaning a baby’s bedroom.

strip the bed, air the beddings and wash bed sheets and pillow cases collect the equipment and materials required for cleaning
make the bed
dust all the surfaces and ornaments
sweep/mop the floor
tidy, arrange the room and clean the equipment used, dry and store.

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Describe the procedure of laundering a polyester pair of trousers.

2/6/2020

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Describe the procedure of laundering a polyester pair of trousers.

wash in warm detergent water by kneading and squeezing rinse thoroughly in warm water
give a final rinse in cold water
use fabric conditioner
drip dry in the shade
press with a warm iron
air dry completely
store appropriately.

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Explain four qualities of a well made in-seam pocket.

2/6/2020

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Explain four qualities of a well made in-seam pocket.

pocket is inconspicuous on the RS for neat appearance
pocket should lie flat to avoid bulkiness
pocket should face the RS of the garment for ease of use
pocket is reinforced at the mouth to avoid tearing
grain of the pocket and that of the garment should be matching to give good drape
pocket mouth should be large enough for the hand of the wearer to enter with ease
pocket bag should be deep enough to prevent items placed inside from dropping out.

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Outline the steps followed in making pin tucks.

2/6/2020

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Outline the steps followed in making pin tucks.

mark the position of the tucks
fold the fabric appropriately/on straight grain on the RS
hold the tucks with temporary stitches close to the fold
stitch close to the fold
work as above, until all tucks are made
remove the temporary stitches and press.

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Explain three points to take into account when buying quality baking tins.

2/6/2020

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Explain three points to take into account when buying quality baking tins.

buy reliable and tested products as these are more likely to be of reasonable standards and good value for money .
insist on a warranty as this is a good indicator of the quality of the item
buy from reliable and established dealers as they are dependable
buy renowned brands as they are a symbol of quality.
buy rust-free tins to avoid poisoning, discolouration or altering the taste of food
buy one that is smoothly finished to avoid injuries and ease of cleaning

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Explain three hygiene practices to observe during food storage.

2/6/2020

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Explain three hygiene practices to observe during food storage.

storage equipment such as refrigerators, kitchen stores, must be kept clean at all timesto avoid attracting pests and micro-organisms
the principal of first in, first out should be practiced when storing foods to prevent food spoilage .
containers used to hold cooked food should be free from cracks and chips to avoid harbouring micro-organisms
dry foods should be stored in well ventilated storage places which are free from pests to avoid spoilage.
Food should be covered or wrapped during storage to avoid contamination

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Giving a reason in each case, state four rules to observe when making short crust pastry.

2/6/2020

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Giving a reason in each case, state four rules to observe when making short crust pastry.

all ingredients must be weighed accurately to come up with a quality product
the mixture should be aerated as much as possible to allow proper raising of the product
pastry should be kept as cool as possible to avoid the fat melting
the pastry should be handled as little as possible to avoid hardening the product
the pastry should be rolled on a light floured surface to avoid sticking
pastry should be rolled with light to and fro movement to avoid extracting the trappe air
the pastry should be baked in a fairly hot oven so that the water is quickly turned to steam to puff up the pastry
all measured liquids should be added at once to give an even texture.

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Describe the procedure you would follow when laundering a coloured cotton handkerchief.

2/6/2020

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Describe the procedure you would follow when laundering a coloured cotton handkerchief.

wash in warm soapy water using friction method rinse in clean warm water
finally rinse in cold water, add vinegar
dry in the shade
iron while slightly damp using a hot iron Air and fold appropriately

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Outline the procedure you would follow to thoroughly clean the plastic chairs to be used for the occasion.

2/6/2020

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Outline the procedure you would follow to thoroughly clean the plastic chairs to be used for the occasion.

Collect equipment and materials
dust the chairs with a dry cloth remove mud with a blunt stick or wet cloth clean with warm soapy water using a soft cloth/sisal fibres/sponge
from top to bottom/underneath/back
rinse using warm water
final rinse with cold water
remove excessive water using a clean cloth/turn/tilt chair upside down so that
water can drain off
buff with a clean dry non fluffy cloth
clean equipment, dry and store

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You are planning to host your sister’s graduation party at home.In preparation for the occasion;Without the use of chlorine, outline the procedure you would use to make muddy contaminated water safe for drinking and store ready for use.

2/6/2020

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You are planning to host your sister’s graduation party at home.In preparation for the occasion;Without the use of chlorine, outline the procedure you would use to make muddy contaminated water safe for drinking and store ready for use.

leave the water to stand for sometime for mud to settle at the bottom of the
container and then decant
filter using a filter paper/home filter/clean cloth
boil the water. Put the boiled water in a clean container
cover with clean lid/cover

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Complete the following table on classification of fibres.

2/6/2020

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Complete the following table on classification of fibres.

Fibre Class

Viscose rayon Regenerated fibres
Elastofiber Synthetic
Polyester Synthetic
Asbestos Mineral

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Differentiate between trimmings and trimming as used in clothing construction.

2/6/2020

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Differentiate between trimmings and trimming as used in clothing construction.

Trimmings are sewing notions used for decorating garments such as laces and bias bindingwhile .
Trimming is the action of cutting off excessive fabric on seams or edges of fabric.

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State two advantages of using tacking stitches.

2/6/2020

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State two advantages of using tacking stitches.

They give direction/guidance for permanent stitching
They hold two or more pieces of fabric in place before permanent stitching
They allow for fitting and adjusting a garment before permanent stitching.

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Identify two functions of openings on a garment.

2/6/2020

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Identify two functions of openings on a garment.

They allow putting on and taking off the garment
They decorate the garment
They introduce a style feature.

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Give two examples of inconspicuous seams.

2/6/2020

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Give two examples of inconspicuous seams.

plain
French seam.
Open seam

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State two precautions to take when laundering viscose rayon.

2/6/2020

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State two precautions to take when laundering viscose rayon.

do not rub or twist dry under the shade/away from sunlight
dry evenly
use a warm iron
iron when damp.
use kneading and squeezing method

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Give two reasons for starching articles.

2/6/2020

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Give two reasons for starching articles.

To restore body and feel of the article
To improve appearance
To give article glossy surface (crease resistant)
To make them dirt resistant
To making them crease resistant

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List two vegetable stains that commonly occur in homes.

2/6/2020

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List two vegetable stains that commonly occur in homes.

banana sap
grass stain
fruit juice stain.
coffee
tea

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Giving an example in each case, differentiate between goods and services.

2/6/2020

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Giving an example in each case, differentiate between goods and services.

Goods are tangible items such as food, tools and clothes which can be bought or sold while services are work rendered at a fee such as cleaning, medical, catering and reaching.

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