Food Preservation Science
📋 What it is
Preserving food — drying, salting, canning, freezing, refrigerating — stops microbes from spoiling it.
🗣️ Coach says
Food spoils because microbes grow on it. Preservation stops them by removing what they need: DRYING removes water, SALTING/sugaring locks water away, CANNING heats then seals out air, FREEZING slows everything down, and refrigeration keeps it cold. Each method fights spoilage in a different clever way.
🧠 Memory hook
Preserve by denying microbes: drying (no water) · salting · canning (heat+seal) · freezing (cold slows all).
😂 Giggle
Why did the meringue go to the gym?
To get whipped into shape!
😲 Whoa!
Honey never truly spoils — archaeologists have found pots of honey in ancient Egyptian tombs, over 3,000 years old, still perfectly edible, because its low water and high sugar stop microbes.
✅ Quick check: Why does salting or drying food help preserve it?
Say your answer out loud first — then reveal.
It removes or locks away the water microbes need to grow, so they can’t spoil the food.
Preservation denies microbes water/conditions to grow.
🧪 Try it! (2 minutes)
Compare a fresh grape and a raisin — drying removed water so microbes can’t spoil the raisin.