Simple machines
Name the six simple machines.
An inclined plane, a wedge, a pulley, a screw, a wheel and axle and a lever.
What does a complex machine consist of?
Two or more simple machines.
Name two sources of energy that are not harmful to the environment.
Sun and water.
What did Archimedes invent?
The water screw.
Who invented the electric television?
Philo Farnsworth.
Which simple machine reduces friction allowing us to transport objects easily?
The wheel and axle.
What type of energy do complex machines NOT usually use?
Energy from people.
Name two sources of energy that are harmful to the environment.
Gas and oil.
Who invented the helicopter?
Leonardo da Vinci.
William Roentgen made an important medical discovery. What was it?
X-ray images.
Which simple machine helps us join two objects together?
A screw.
Which type of complex machines apply force to make an object move?
Mechanical mahines.
We can use sun and water to generate a different type of energy. What is it?
Electricity.
Why was Nikola Tesla important?
He did important work on electrical power and radio communications. He also invented the elctric motor.
What is acid rain?
It's when toxic gases in the atmosphere mix with the rain. It can be harmful for plants and animals.
Which simple machine has a wheel and a rope?
A pulley.
What type of complex machine can help us do big calculations?
An information processing machine.
Thinking of machines and safety, name something that you shouldn't use near water.
Electricity or electric appliances.
Who invented penicillin?
Sir Alexander Fleming.
What can cause problems for some marine animals?
Plastic waste.
Which three elements are part of ALL types of levers?
Effort, fulcrum and load.
Name two thermal machines.
Fridge, freezer, heater.
Name two types of protective clothing you can wear.
Safety goggles and helmets.
What did Mary Anderson invent?
Windshield wipers.
Name one way to save elctricity.
Solar panels.
Turning off the lights when you are not using them.