Chapter: Water Table of Contents Section 3: Recycling Water Section 1: The Nature of Water Section 2: Why is water necessary?

Water and Life Even more than food, water is critical to your immediate survival. About 70 percent of your body is water. It fills and surrounds the cells of your body, enabling many of your body’s processes to occur. Why is water necessary? 2 Water helps move nutrients throughout your body, temperature, eliminate wastes, digest food, and lubricate joints.

Even more than food, water is critical to your immediate survival.

About 70 percent of your body is water.

It fills and surrounds the cells of your body, enabling many of your body’s processes to occur.

Water helps move nutrients throughout your body, temperature, eliminate wastes, digest food, and lubricate joints.

Water and Life Water molecules are attracted to other polar molecules . Together with cohesion, this provides the capillary action that draws water upward through narrow tubes inside plants stems . Why is water necessary? 2

Water molecules are attracted to other polar molecules .

Together with cohesion, this provides the capillary action that draws water upward through narrow tubes inside plants stems .

Water and Society— Water for Production Water is used for processing and cooling during the production of paper, chemicals, steel, and other products. Water also is necessary for transporting manufactured goods. Why is water necessary? 2 Mining and refining Earth’s natural resources call for large amounts of water.

Water is used for processing and cooling during the production of paper, chemicals, steel, and other products.

Water also is necessary for transporting manufactured goods.

Mining and refining Earth’s natural resources call for large amounts of water.

Water and Society— Water for Production In general, communities located near water are better able to attract industry and often have the most productive economies . Why is water necessary? 2

In general, communities located near water are better able to attract industry and often have the most productive economies .

Water and Society— Water for Production Why is water necessary? 2 Agriculture uses used in the United States, the largest percentage of any sector. about 41 percent of all the water

Agriculture uses

Water and Society— Water for Production Why is water necessary? 2 Irrigation means piping in water from elsewhere and using it to grow crops. of this water is used for irrigation of farmland. Most

Irrigation means piping in water from elsewhere and using it to grow crops.

Most

Water for Transportation Passenger liners are popular for vacations. Why is water necessary? 2 Ferries move people, cars, and freight across bays, straights, and rivers. Big ships often are the most economical way to move large freight within the country or across the ocean.

Passenger liners are popular for vacations.

Ferries move people, cars, and freight across bays, straights, and rivers. Big ships often are the most economical way to move large freight within the country or across the ocean.

Water for Recreation Many people equate water with fun —fishing, swimming, scuba diving, waterskiing, and boating. Why is water necessary? 2 Boating provides entertainment for many people.

Many people equate water with fun —fishing, swimming, scuba diving, waterskiing, and boating.

Boating provides entertainment for many people.

Water for Recreation Why is water necessary? 2 Sailors, canoeists, kayakers, power boaters, and whitewater rafters all spend recreation time on the water.

Sailors, canoeists, kayakers, power boaters, and whitewater rafters all spend recreation time on the water.

Water Use Water is a valuable natural resource that must be conserved and protected. Why is water necessary? 2 Not only is clean water important for use in homes and by society, it is necessary for maintaining the ecological balance in nature. Many species of wildlife live in and around bodies of water.

Water is a valuable natural resource that must be conserved and protected.

Not only is clean water important for use in homes and by society, it is necessary for maintaining the ecological balance in nature.

Many species of wildlife live in and around bodies of water.

Water Use Bodies of water must be clean to support the animals and plants that live in them. Why is water necessary? 2 If too much pollution enters rivers, lakes, or ponds, wildlife will be harmed.

Bodies of water must be clean to support the animals and plants that live in them.

If too much pollution enters rivers, lakes, or ponds, wildlife will be harmed.

Water Use Why is water necessary? 2 Oceans also must be kept clean of pollutants such as oil, chemical and radioactive wastes, and litter.

Oceans also must be kept clean of pollutants such as oil, chemical and radioactive wastes, and litter.

Conserving Water Less than one percent of Earth’s water is available for any of the uses described , except for ocean transportation. Why is water necessary? 2 That’s why it is important to conserve the available freshwater on Earth. The careful use and protection of water is called water conservation .

Less than one percent of Earth’s water is available for any of the uses described , except for ocean transportation.

That’s why it is important to conserve the available freshwater on Earth.

The careful use and protection of water is called water conservation .

Conserving Water Much of the water used for irrigation is lost to evaporation. Why is water necessary? 2 Better methods can conserve water. Instead of flooding fields, farmers can use overhead sprinklers on their crops. Some farmers install tubing that slowly drips water directly above the roots of the plants.

Much of the water used for irrigation is lost to evaporation.

Better methods can conserve water.

Instead of flooding fields, farmers can use overhead sprinklers on their crops.

Some farmers install tubing that slowly drips water directly above the roots of the plants.

Conserving Water Farmers even use computers in the fight for water conservation. Why is water necessary? 2 Sensors installed in the ground and connected to a computer can signal when crops need to be watered. In residential and commercial areas, mulching the ground around the plants helps prevent water loss.

Farmers even use computers in the fight for water conservation.

Sensors installed in the ground and connected to a computer can signal when crops need to be watered.

In residential and commercial areas, mulching the ground around the plants helps prevent water loss.

Conserving Water Why is water necessary? 2 Industries also can conserve water. Companies can treat and recycle the water that is used in industrial plants.

Industries also can conserve water.

Companies can treat and recycle the water that is used in industrial plants.

What can you do? You could conserve water in your shower . Why is water necessary? 2 Turn the water off when you are soaping up , then use it just for rinsing . How much is this ? For Gallons- divide each number by 3.75. Personal use every day.

You could conserve water in your shower .

Turn the water off when you are soaping up , then use it just for rinsing .

How much is this ? For Gallons- divide each number by 3.75.

What can you do? Why is water necessary? 2 Do the same while brushing your teeth and washing your hands . See whether your home has a low-flow toilet system.

Do the same while brushing your teeth and

What can you do? Low flush toilets are available that use only 6 L per flush compared to about 19 L per flush for older toilets. Why is water necessary? 2 Some ornamental plants require less water than others. Over the course of a year or more, small measures such as these can save large amounts of water.

Low flush toilets are available that use only 6 L per flush compared to about 19 L per flush for older toilets.

Some ornamental plants require less water than others.

Over the course of a year or more, small measures such as these can save large amounts of water.

Section Check 2 Question 1 What percentage of the human body is composed of water? A. 23% B. 55% C. 70% D. 90% NC: 3.08

Section Check 2 Answer The human body is composed of 70% water. NC: 3.08

Section Check 2 Answer Water is used in industry, irrigation, transportation, and recreation. (yes…life too.) Question 2 List some examples of why water is essential on Earth.

Section Check 2 Question 3 Which uses the most water? And why/how? NC: 3.07

Section Check 2 Answer Agriculture uses the most water because farmers have to use water to grow crops. NC: 3.07