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Design challenge: an insulated container — Homework
Use this week's conduction/convection/radiation ideas to justify each design choice.
- 1.Why do thermoses often have a shiny, mirror-like inner lining?
- 2.Why is a thermos built with a double wall and a gap between the layers, rather than one thick solid wall?
- 3.An insulated lunch bag keeps a sandwich cool for 3 hours; an uninsulated paper bag manages 45 minutes. What does this provide evidence for?
- 4.You build an insulated box with excellent foam walls but forget a lid. Predict what happens to the ice, and why.
- 5.Describe your own insulated-container design, naming a material for each heat-transfer method and explaining each choice.
🌲 Homeschool of the FutureEighth Grade · Science · week 17 homework