use, to do an action, to make an action, hard, not heavy, not soft, light, not heavy, not hard, material, what things made of, what we need to make something, plastic, something people use to make bottles and plates, something people use to make roads, scientist, someone who's genius, someone who studies the world, to try something to see if it works, test, material, to decide how something should work or look, desing, create, something haff that people use to build machines and cars, plastic, metal.

unit 5

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