Design and Technology KS4: The importance of staying hydrated

Why is water essential to the human body?

Water is essential for diet and functions in the body, including digestion and absorption of nutrients, kidney function, regulating body temperature regulation and preventing dehydration.

We lose water from our bodies in sweat, faeces, urine and respiration, and faster during exercise because both our respiration and sweating rates increase.

Recommended daily fluid intakes vary according to age and physical activities.

Symptoms of dehydration include thirst, a dry mouth, headache, passing less urine less frequently, constipation, irritability and anxiety …and unfortunately, as our hapless legionnaire ultimately discovers, death.

Teacher Notes

Key Stage 3: Students could prepare and serve either a water or milk- based thirst - quenching fruit drink to rehydrate an athlete after exercise.

Students could explain to others why their drink is suitable for an athlete.

They could taste the drinks and evaluate their qualities.

Key Stage 4: Students could survey fellow students to discover which bottled or canned soft drinks, including sports drinks they consume regularly.

From the can, bottle or pack information, students could calculate the amount of sugar in grams in each drink.

Show the amount of sugar in grams (and in teaspoonfuls) each drink contains on a chart.

A slightly rounded teaspoonful of sugar = 6g.

As a group or whole class, discuss the findings.

Should manufacturers be forced to reduce the amount of sugar in food and drink?

Curriculum Notes

This clip will be relevant for teaching Food Technology and Modern Studies at GCSE in England, Wales and Northern Ireland.

This topic appears in OCR, Edexcel, AQA, WJEC KS4/GCSE in England and Wales, CCEA GCSE in Northern Ireland

More from the series Food preparation and nutrition

Eight tips for healthy eating
The causes of food poisoning
Food production
Food Groups and the Eatwell Guide
Energy needs of the body
Healthy cooking methods
What information is included on food packaging?
How our senses guide food choices