The airplane’s p________ began spinning before taking off.
propellers
She typed her homework quickly on the computer ___.
keyboard
Cars need (propellers / fuel) to run.
fuel
Cars, taxi, airplane and boats are examples of v______.
vehicles
Each ______ must wear a seatbelt during the trip.
Passenger
The d_____ between my house and the school is about 2 kilometers.
distance
what do you call the oil that cars use and is made from plants materials.
biodiesel
What's this?
electric car
The firefighters worked quickly to r______ the people.
rescue
Solar panels (power / transmit) the lights in the school hallway.
Power
Name one thing that the first steam engine used before to work. Example of it is "oil".
coal / fuel
What did John Baird invent?
television (TV)
The ______ floated slowly above the mountain.
hot-air balloon
People use smartphone to (rescue / communicate) with friends around the world.
communicate
The teacher used the ______ to print the worksheets for the class.
printer
What did Alexander Graham Bell invent?
telephone
There's a picture of a girl on the computer __________.
monitor
In the past, ______ was widely used to produce electricity.
coal