opposite poles of magnets, attract each other, repel each other, same poles of magnets, attract each other, repel each other, Contact forces only work if the objects touch, false, true, Non- contact forces work without the objects touching, false, true, magnets is a contact force, false, true, gravity is a non- contact force, true, false, pressing a button is a contact force, false, true, electrostatic force is a, contact force, non- contact force, opening a door and throwing a ball is a, non- contact force, contact force, mop, knife, ruler, thermometer, screwdriver is an example of, tools, complex machine, machines can help us, move things, lift things, carry things, build or make things, read a story and sing a song, a screw is…, two inclined planes joined together, an inclined plane around a cylinder, a wheel and axle, is a surface that connects a higher point to a lower point, consist of two parts., a pulley is…, a wheel with a rope or chain around it, an inclined plane around a cylinder, a wedge is…, consist of two inclined planes joined together, a solid bar that rests on a fulcrum, sn inclined plane is…, consist of two parts, a surface that connects a higher point to a lower point, a lever, has got a solid bar that rests on a fulcrum, a wheel with a rope or chain, a wheelbarrow and scissors are, simple machine, complex machine, The difference between simple and complex machines is that a complex machine consists of two or more simple machines working together., true, false, help us find information more quickly, planes, wheels and axels, computers and internet, light bulbs, helped us communicate easily with people far away, fridges, telephones and mobile phones, radio and television, steam engines, helped us transport things over long distances, wheel and axels, computers and internet, washing machines, mobile phone, helped us see at night, internet, planes, television, light bulbs, important for sharing information, household machines, radio and television, steam engines, wheels and axels, helped people save time, fridges, washing machines, dishwashers and irons, light bulbs, mobile phones, planes, helped us travel to other countries faster, telephones, dishwashers, computer, planes, people used it to power large machines in factories, steam engines, radio, internet, irons

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