Summary
Investigates lunch as a science lab: the properties of food materials — color, texture, state of matter, hardness, and more — and how cooking changes those properties physically or chemically.
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All ages
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Teaching resources
Discussion questions
Discussion
- What observable properties can you notice about your lunch without eating it?
- When you heat an egg, is that a physical or chemical change? How do you know?
- What is the difference between melting ice (physical) and burning toast (chemical)?
- Name one cooking change that can be reversed and one that cannot.
Quick work-a-long
Vocabulary: property, physical change, chemical change, reversible, texture, state of matter.
Try it: Describe your lunch using only observable properties — no food names allowed. Read your description to a partner and see if they can guess what it is.