health Archives - Free ZIMSEC & Cambridge Revision Notes

Health and well being

By garikaib|2022-09-15T12:40:41+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Exercise is key to maintaining one’es health. Image credit centrictv.com ZIMSEC O Level Combined Science Notes: Health and well being

Health is the absence of disease
It is a state of being physically and psychologically well.
A person is said to be healthy […]

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Nutrition

By garikaib|2022-09-15T12:40:40+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

A balanced diet. Image credit healthandstylish.com ZIMSEC O Level Combined Science Notes: Nutrition

Nutrition is that branch of science that deals with nutrients and nutrition especially in humans
It is concerned with ensuring that humans are eating foods that provide necessary nutrients for health and growth
Nutrients […]

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Food types and their importance

By garikaib|2022-09-15T12:40:40+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Different types of food have different functions. Image credit healthydietadvisior.com ZIMSEC O Level Combined Science Notes: Food types and their importance

Carbohydrates-these are energy-rich foods that are largely made up of starch and sugars. They are easily broken down in the […]

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Carrying out Food Tests

By garikaib|2022-09-15T12:40:40+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Testing for starch. Image credit fineartamerica.com ZIMSEC O Level Combined Science Notes: Carrying out Food Tests

It is important to know how much nutrients they contain
This would be useful to nutritionist and those who are health conscious

Food Testing experiments

Simple tests can be made […]

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Science:Malnutrition

By garikaib|2022-09-15T12:39:49+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Eating junk food can lead to obesity. Image credit newtimes.co.rw ZIMSEC O Level Combined Science Notes: Malnutrition

Malnutrition is lack of proper nutrition
It is a result of either not having enough to eat
Or not eating enough of certain nutrients that the […]

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Deficiency Diseases

By garikaib|2022-09-15T12:39:49+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Iodised salt can prevent iodine deficiency ZIMSEC O Level Combined Science Notes: Deficiency Diseases

A person might suffer from a deficiency disease if their diet lacks certain essential minerals and vitamins
Two essential minerals and vitamins are:
Iodine and
Vitamins

Iodine Goitre is a [...]
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Experiment: Food and Energy

By garikaib|2022-09-15T12:38:06+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Burning food to to test its energy content ZIMSEC O Level Combined Science Notes: Experiment: Food and Energy

Aim: Comparing the energy value of foods

Materials: burners, small containers/beakers to hold the water, food holders, thermometers, different types of starchy and fatty foods

Method

Set up the apparatus […]

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People and Energy

By garikaib|2022-09-15T12:38:06+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Construction workers require a lot of energy. Image credit nehandaradio.com ZIMSEC O Level Combined Science Notes: Experiment: People and Energy

While it is true that everyone needs energy for metabolism and daily activities
Different people have different food needs
Food requirements can […]

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Teeth and tooth decay

By garikaib|2022-09-15T12:38:05+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Good dental care is part of human health. Image credit claimfame.com ZIMSEC O Level Combined Science Notes: Teeth and tooth decay

While people enjoy food of all varieties
Some types of food
For example sweets, chocolates, carbonated drinks, cakes and […]

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Experiment: Testing tooth cleaning agent

By garikaib|2022-09-15T12:38:05+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Colgate toothpaste ZIMSEC O Level Combined Science Notes: Experiment: Testing tooth cleaning agent

Aim: To test the properties of teeth cleaning agents

Materials: various brands of toothpaste, pH paper, microscopes, slat, bicarbonate of soda, lid bottles/suitable containers for the toothpaste

Method

Examine toothpaste under a microscope to compare the particle size of the various […]

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January 2023