Marconi's achievement was so extraordinary that at first people didn't believe it.

Everyone can take action to protect the environment.

It's not against the law to take photographs.

As a result of his work we have seen the development of broadcasting and communications.

His last attempt to win the prize for inventing a clock was a clock called H1.

He discovered there were germs called bacteria which caused liquids to turn sour.

A biologist is a scientist who studies living things.

Broadband transmission makes internet communication extremely fast.

As a result of his work we have seen the development of broadcasting and communications.

Carson wrote about the destructive effect of pesticides on the chain of life.

A chemist is a scientist who studies chemistry – the study of the structure of substances.

We have seen the development of communications satellites, radar etc. as a result of his work.

Consequently, the US government took action to control the use of pesticides.

The US government started to take action to control the use of pesticides in agriculture.

Carson's book was controversial and, as a result, she was attacked by the chemical industry.

Pasteurisation kills the bacteria by boiling and then cooling the liquid.

Creation is the act of creating something.

Most scientists believed that radio waves would not follow the curve of the earth's surface.

A decision is a choice that you make after thinking carefully.

Rachel Carson wrote a controversial book about the destructive effects of pesticides.

As a result of his work we have seen the development of broadcasting and communications.

Do you prefer writing or discussion?

Most infectious diseases are caused by germs in the air.

Engineers design of build things such as machines or bridges.

The impact of the book was so enormous it was compared with Darwin's theory of evolution.

Humpback whales have evolved over millions of years.

Most infectious diseases are caused by germs in the air.

The impact of the book was so enormous it was compared with Darwin's theory of evolution.

The clock was inaccurate – it was later than they thought.

Most infectious diseases are caused by germs in the air.

Vaccination prevents some illnesses by injecting weak forms of the disease into the blood.

Pasteur's discovery lead to his “germ theory of disease”.

He discovered there were germs called bacteria which caused liquids such as milk to turn sour.

They couldn't measure longitude – the distance east or west of an imaginary vertical line.

Louis Pasteur made one of the most important discoveries in medical history.

The meridian is an imaginary line that goes around the earth from the top to the bottom.

Pasteurisation involves killing bacteria by boiling and then cooling the liquid.

Most dairy products today are pasteurised.

The clock he invented worked perfectly.

permission is the right to do something that is given to you by someone else.

Farmers use pesticides to kill insects.

A physicist studies the science that deals with heat, light and other sources of energy.

Pasteur's pioneering work has protected millions of people from disease.

Silent Spring caused a massive protest against environmental pollution.

People place a high value on material possessions like cars and mobile phones.

Vaccination prevents some illnesses by injecting weak forms of the disease.

Ghandi was in favour of non-violent protest.

We have seen the development of communications satellites, radar etc. as a result of his work.

Most scientists believed that radio waves would not follow the curve of the earth's surface.

Revision is an important part of exam preparation.

The signal was picked up in Newfoundland, 3,500 km away.

A transmitter signalled the letter S – three dots in Morse code.

The government offered £20,000 to anyone who came up with a solution to the problem.

An estimated 700 lives were saved thanks to SOS signals.

He discovered there were germs called bacteria which caused liquids to turn sour.

Marconi had already successfully transmitted a message over 50 km in 1899.

The US government started to take action to control the use of pesticides in agriculture.

An estimated 700 lives were saved thanks to SOS signals from a Marconi transmitter.

Pasteur's discovery led to his “germ theory of disease”.

This technique improves your breathing and therefore your voice.

The first transatlantic radio transmission was made from Italy to Newfoundland.

Marconi made the first ever transatlantic radio transmission in 1901.

Marconi successfully transmitted a message over 50 km in 1899.

A transmitter signalled the letter S – three dots in Morse code.

Vaccination prevents some illnesses by injecting weak forms of the disease into the blood.

The watch was tested on a voyage to the West Indies in 1764 and worked.

Vaccination prevents some illnesses by injecting weak forms of the disease.

If we know the time at two different points, we can work out where we are.