Attract or repel?
repel
Attract or repel?
Attract
Energy can change things. True or false?
True
We don't need energy when we cook food. True or false?
False
Name some kinds of energy
sound, heat, fuel
Name some examples of sound energy
speaker, headphones, drums, guitar
Name some examples of heat energy
iron, cooker, microwave, oven, ....
Name some examples of fuel energy
oil, coal, gas
How do wheels and pulley help our life?
They help something move easier.
Name some inventions or machines used for farms:
Tractor, Harvester, Spreader, Seeder, Digger, Sprayer
Name some inventions or machines used for construction:
Truck, Crane, Conrete Mixer, Backhoe, Excavator, Roller
Name some inventions or machines used for communication:
smart phone, computer, radio, laptop
Name some vehicles we use in the past
horse, wagon
Who invented the light bulb?
Thomas Edison
Who invented the telephone?
Alexander Graham Bell
