What is force?, A sound wave, A type of energy, A kind of light, A push or pull, What does gravity do?, Stops all motion, Pulls objects down, Makes light, Pushes objects away, What unit measures force?, Newton, Second, Liter, Meter, About how much is one newton?, A minute of time, A paperclip length, Small apple weight, A car's weight, What are balanced forces?, Equal opposite forces, Very weak forces, Forces causing motion, Only gravity forces, What happens with balanced forces?, Speed increases, Direction always changes, No movement change, Object disappears, What are unbalanced forces?, Forces with no mass, Equal forces, Invisible forces only, Unequal forces, What can unbalanced forces cause?, Melting, Movement, Freezing, No motion, What is friction?, Force making sound, Force resisting motion, Force measuring mass, Force causing light, Where does friction happen?, Only underground, In empty space, Between touching surfaces, Only in water

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