Grade 5 Home Science Foods And Nutriation – Food Preservation Notes
Home Science — Foods & Nutrition
Subtopic: Food Preservation
For learners in Kenya — age 10
What is food preservation?
Food preservation means keeping food fresh and safe to eat for longer. It stops food from going bad (spoiling) and helps us save money and avoid waste.
Why do we preserve food?
- To stop germs and insects from spoiling food.
- To store seasonal food (like mangoes) for use later.
- To save money and have food available during lean times.
- To keep food safe and healthy to eat.
Common methods (easy to try at home)
1. Sun-drying ☀️ (Drying)
- What: Remove water from food so germs cannot grow.
- Kenyan examples: mango slices, dried bananas, cassava chips, maize (grain drying), omena (small fish).
- How to do it (simple steps): wash and cut food thin, place on a clean tray or mat in the sun, cover with a fine cloth to keep flies away, turn food so it dries evenly. Dry until it is hard or leathery.
- How long it keeps: a few weeks to months if fully dry and stored in airtight containers.
- Kenyan examples: mango slices, dried bananas, cassava chips, maize (grain drying), omena (small fish).
- How to do it (simple steps): wash and cut food thin, place on a clean tray or mat in the sun, cover with a fine cloth to keep flies away, turn food so it dries evenly. Dry until it is hard or leathery.
- How long it keeps: a few weeks to months if fully dry and stored in airtight containers.
2. Smoking (for fish and meat) 🔥
- What: Use smoke and heat to remove moisture and add a protective layer.
- Kenyan examples: smoked fish (tilapia, Nile perch) or smoked meat from some communities.
- How to do it (simple): clean fish or meat, salt it lightly, then hang over low-smoke fire until dry and smoky. Ask an adult for help — it needs a safe fire.
- How long it keeps: weeks to months when kept dry and wrapped.
- Kenyan examples: smoked fish (tilapia, Nile perch) or smoked meat from some communities.
- How to do it (simple): clean fish or meat, salt it lightly, then hang over low-smoke fire until dry and smoky. Ask an adult for help — it needs a safe fire.
- How long it keeps: weeks to months when kept dry and wrapped.
3. Salting 🧂
- What: Salt draws out water and stops bacteria.
- Kenyan examples: salted fish, beef jerky.
- How to do it (simple): rub salt on the food or soak in very salty water. Keep in a clean container. Salted food can be rinsed before cooking.
- How long it keeps: weeks to months depending on salt amount and storage.
- Kenyan examples: salted fish, beef jerky.
- How to do it (simple): rub salt on the food or soak in very salty water. Keep in a clean container. Salted food can be rinsed before cooking.
- How long it keeps: weeks to months depending on salt amount and storage.
4. Refrigeration & Freezing ❄️
- What: Cold slows germs and keeps food fresh.
- Kenyan examples: storing milk, meat, fruits like mangoes in a fridge at home or in a local shop's fridge.
- How to do it: put cooked food in clean, covered containers before putting in the fridge or freezer. Keep raw meat separate from ready-to-eat foods.
- How long it keeps: fridge (a few days), freezer (months).
- Kenyan examples: storing milk, meat, fruits like mangoes in a fridge at home or in a local shop's fridge.
- How to do it: put cooked food in clean, covered containers before putting in the fridge or freezer. Keep raw meat separate from ready-to-eat foods.
- How long it keeps: fridge (a few days), freezer (months).
5. Sugaring & Making Jam 🍯
- What: Sugar preserves fruit by stopping germs.
- Kenyan examples: mango jam, mango chutney, pineapple jam.
- How to do it (simple): cook fruit with sugar until thick, put into clean jars, seal. Always use an adult's help for boiling.
- How long it keeps: months if jars are sealed and kept cool.
- Kenyan examples: mango jam, mango chutney, pineapple jam.
- How to do it (simple): cook fruit with sugar until thick, put into clean jars, seal. Always use an adult's help for boiling.
- How long it keeps: months if jars are sealed and kept cool.
6. Pickling & Fermenting 🥒
- What: Use vinegar or salt brine to keep vegetables and some fruits safe.
- Kenyan examples: pickled mango slices, fermented vegetables in some homes.
- How to do it (simple): wash vegetables, put in a jar with vinegar or salt solution and spices, close the jar. Leave for days or weeks to develop flavor.
- How long it keeps: weeks to months when kept sealed.
- Kenyan examples: pickled mango slices, fermented vegetables in some homes.
- How to do it (simple): wash vegetables, put in a jar with vinegar or salt solution and spices, close the jar. Leave for days or weeks to develop flavor.
- How long it keeps: weeks to months when kept sealed.
Easy safety tips
- Always wash hands and clean utensils before handling food.
- Use clean trays, jars and cloths to keep insects away.
- Do not eat food that smells bad or has mold. Throw it away.
- Keep preserved food in cool, dry places and away from direct sunlight (except when sun-drying).
- Ask an adult to help with boiling, heating or making fires.
Try this simple activity at home (with an adult)
Sun-dried mango slices
- Wash and peel ripe mangoes. Cut into thin slices.
- Place slices on a clean tray or baking sheet. Cover with a thin net or cloth to keep flies away.
- Put the tray in the sun for 2–4 days. Turn slices every day so they dry evenly.
- When slices are dry and not sticky, store them in a clean airtight container.
Tip: If your home has many flies, dry under a shaded veranda with good airflow or use a simple drying rack.
Quick quiz (check answers below)
- Which method uses cold to keep food fresh?
- Name one Kenyan food you can sun-dry.
- True or False: Moldy food is safe if you cut the mold off.
Answers:
1. Refrigeration / Freezing ❄️
2. Mango, bananas, cassava, omena, maize (any one is okay)
3. False — do not eat moldy food; throw it away.
Remember: Preserving food helps your family save money and have good food during the year. Always work with an adult and keep everything clean.
Made for learners in Kenya • Home Science — Foods & Nutrition