A bird lands on a birdhouse. Is the bird pushing from the outside or the inside?, Inside, Outside, The wind blows hard on a tall tent. What kind of force is the wind?, External, Internal, If you use your foot to kick a ball, is your foot an "Outside Push"?, Yes, No, You sit on a chair. The legs of the chair feel a "squeeze." Where is that squeeze?, On the outside (External), On the inside (Internal), What happens to Play-Doh when you put a heavy block on top of it?, it squishes, It stays a perfect ball, If you pull a rubber band, do you feel a "stretch" on the inside?, No, Yes, Which shape helps a tower stay strong and not break?, Square, Triangle, If an "Outside Push" (External Force) is too heavy, what happens to the tower?, Falls down or breaks, It grows taller.

Internal and External Structures

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