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Strong vs. Weak Tension and Compression
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Strong vs. Weak Tension and Compression
Image of Steel
Image of Reinforced Concrete
Image of Wood
Image of Concrete
Bridges must be built of strong materials — but there are different kinds of strength.
Compression strength: Strong when squeezed
Tension strength: Strong when stretched
Drag the images of the different materials to the appropriate part of the diagram.
CONCRETE
WOOD
STEEL
Concrete
Wood
Steel
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Good Work!
Wood can be strong under both compression and tension—but its tensile strength is less than steel's, and its compressive strength is less than concrete's.
Engineers get the best qualities from steel and concrete by making reinforced concrete.
Reinforced Concrete
Concrete is poured around steel bars (rebar) to form structures that are strong in both tension and compression.
Drag the reinforced concrete to the Tension-Compression diagram!
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