SIMPLE MACHINES
A ____ is made up of a rope and one or more wheels.
Pulley
These machines change the temperatures of an object or space like the heater or the fridge.
thermal machines
The first electric television was invented by _____ in 1927.
Philo Farnsworth
Most marine animal confuse the _______ as their food that's why we need to stop using it in order to not pollute our oceans.
plastics
This images can show bones and some organs inside the body. This is invented by William Roentgen.
X- ray
The round shape of the ____ reduces the amount of friction between an object and the surface it is moving on.
wheel
These machines process and transform information like computers and mobile phones.
information processing machines
He painted Mona Lisa.
Leonardo da Vinci
This type of wastes comes from nuclear power plants and we need to stop throwing this in our rivers and lakes because its effects can last for hundreds of years.
Radioactive wastes
This was invented by Mary Anderson in 1903. This invention helps a lot of drivers while driving under the rain.
windshield wipers
It is consist of an inclined plane which goes around a cylinder. This can tighten or join two objects together
Screw
All machines need _______ to function.
energy
He was an ancient Greek mathematecian, astronomer and engineer whol invented a type of screw to remove the water from the bottom of the ships.
Archimedes
____ and ____ releases toxic gas and smoke into the air.
Oil and coal
Levers are classified in how many classes?
Three
A a machine with few or no moving parts is called a _________.
Simple machine
It consists of two or more simple machines.
complex machines
Nikola Tesla was born in 1856 in what country in Europe?
Croatia
It is a thick cloud of pollution which can form over cities with a huge air pollution problems.
Smog
It is made up of two inclined planes put together to split or cut an object.
Wedge
What is the main function of simple machines?
To make work easier.
This is used to convert solar energy to electricity.
solar panels
Who invented penicillin in 1928?
Alexander Fleming
It has a high level of acid that can be deadly to plants and animals. It also takes away nutrients from the soil and pollutes water.
Acid rain
We have a very limited ______ in our planet that's why we have to protect it and take care of it.
Natural resources