Задание
Choose the correct options
Find the best heading for each paragraph. There is one extra heading which you do NOT need to use.
Sad statistics.
Dirty water diseases.
The basic element.
Physical characteristics.
Dangerous condition.
Need to survive.
Water figures.
A.
Water is an organic, mainly tasteless, odourless and transparent chemical substance. This is the only substance which has three natural conditions: liquid, solid and gas (vapour). It changes its condition due to changing temperatures.
B.
Water plays a very important role. It is the main source of energy and life. Each cell of the body requires water. Up to 60 % of the human adult body is water. It's impossible to live without it for more than three days. Losing more than 10 % of water can lead to a person's death.
C.
Water covers 71 % of the earth. That is around 360 square kilometres. More than 97 % of it is the ocean, which means that this water cannot be used for drinking or agriculture. Fresh water is contained mostly in ice caps, and it is frozen. So, there is less than 1 % of water in rivers and in underwater sources which humans can use for drinking.
D.
Most people use clean water every day: when brushing their teeth, cleaning and even washing their cars or dogs. We don't realise the value of water when we open the tap in the kitchen. But for some people in poor parts of the world, each litre of clean water is a chance to live another day.
E.
Pollution has become a great problem. Water, air and soil are badly polluted. Hard effort must be made in order to clean them and make water appropriate for drinking. We have to be sure that we drink clean water. Otherwise, it can ruin our health and body: problems with internal organs, skin and teeth are possible.
F.
Water can sometimes bring death. Because of floods, thousands of people suffer or even die every year. Those who survive lose their property and houses. Besides, other natural disasters, such as tornadoes, earthquakes and hurricanes, can negatively affect water balance.