At home we have a lot of machines and all of them need _____ to work.
Electricity
This invention allows us to see in a dark room.
Light bulb
You can pilot one of these if you are an astronaut.
Spacecraft
Electronic devices need either electricity or _____.
Batteries
Before this invention, painted portraits were very popular.
Photography
In the past, this invention was very useful for listening to the news.
Radio
This rounded invention allowed people to move heavy objects easily.
Wheel
During the industrial revolution, this invention was used specially for trains.
Steam engine
You can fly with one of these.
Aeroplane
You can see your bones with this!
X-ray
This was very important to fight COVID.
Vaccination
This medicine is used to fight bacteria.
Antibiotics
