1) Which internal force is a pushing force that squeezes a material? a) bending b) compression c) tension d) torsion 2) Which internal force is a pulling force that stretches a material? a) bending b) compression c) tension d) torsion 3) Which internal force is a twisting or turning force? a) bending b) compression c) tension d) torsion 4) Which internal force causes one side of the material to squeeze together and the other side to stretch apart? a) bending b) compression c) tension d) torsion 5) Which internal force often makes materials shorter? a) bending b) compression c) tension d) torsion 6) Which internal force makes a straight material curved? a) bending b) compression c) tension d) torsion 7) Which internal force often makes materials longer? a) bending b) compression c) tension d) torsion 8) What shape is often used when building a beam bridge? a) rectangles b) arches c) triangles d) pentagons 9) What shape is often used when building an arch bridge? a) rectangles b) arches c) triangles d) pentagons 10) What shape is often used when building a truss bridge? a) rectangles b) arches c) triangles d) pentagons 11) How can buildings withstand the forces of a tornado? a) reinforced concrete b) pillars c) straw d) sticks e) foam padding f) bubble wrap 12) How can buildings withstand the forces of a large wave? a) reinforced concrete b) pillars c) straw d) sticks e) foam padding f) bubble wrap 13) How can protective sports equipment protect your body from the impact of forces? a) reinforced concrete b) pillars c) straw d) sticks e) foam padding f) bubble wrap 14) Protective sports equipment like helmets, spread the force of an impact over a larger area. a) true b) false 15) Protective sports equipment like helmets makes the force less intense in any one spot.   a) true b) false

Understanding Structures and Mechanisms

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