3. Comment on other classmates’ work and choose the best design in different areas, such as the bag that has the best insulation performance, the most creative bag and the most beautiful bag.
My bag is made up of different parts, such as … The innermost layer is made of … It can … To make the bag more beautiful, I …
Properties of matter
metal pot
Good thermal conductors
Poor thermal conductors
Non–metals
Metals
most of them
Electrical conductors
Insulators
wire
Engineering design process
P resentation and reflection D efining the problem
C ollecting information
D rawing a design
M aking the product
I mprovement
T esting and analysis
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