Lesson | Unit.D_Sci.8 - sts.1 | Describe the distribution and characteristics of water in local and global environments

Less than 1%

About 2%

97%

50%

Deserts

Rocky Mountain glaciers

Oceans

Rainforests

Less than 1%

About 2%

97%

50%

Oceans

Groundwater

Glaciers

Lakes and Rivers

They are vast saltwater bodies covering most of Earth.

They are seasonal and permanent ice formations.

They are water held in underground aquifers.

They are surface freshwater sources.

Snow and Ice Caps

Groundwater

Lakes and Rivers

Glaciers

Water that is safe for human consumption

Water that is used for agriculture

Water that is found in oceans

Water that is used for industrial purposes

Less than 1%

10%

25%

50%

It highlights the importance of water conservation and protection

It shows that oceans are the main source of drinking water

It indicates that all freshwater is easily accessible

It proves that water is abundant and unlimited

High (lots of salt)

Low (little salt)

Medium

None

Rivers

Lakes

Glaciers

Oceans

Desalination

Fishing

Drinking

Industrial cooling

The concentration of dissolved salts

The concentration of calcium and magnesium ions

How clear or cloudy the water appears

The temperature of the water

Thermometer

Conductivity meter

pH meter

Color-changing strips

The amount of suspended particles

The concentration of dissolved salts

The concentration of calcium and magnesium ions

The temperature of the water

They provide detailed information about contaminants.

They are quick and easy to use in the field.

They require laboratory equipment.

They take 24-48 hours to complete.

Color-changing paper strips

Nutrient media

Laboratory equipment and trained technicians

Portable test kits

1-2 hours

12-24 hours

24-48 hours

72 hours

It must be free from harmful bacteria, viruses, and parasites.

It must have a low pH level.

It should contain high levels of dissolved solids.

It should have a strong odor.

High levels of lead and arsenic.

Levels of harmful chemicals must be below established safety thresholds.

Presence of industrial pollutants.

High turbidity.

Setting legal limits for contaminants based on scientific research.

Ensuring water has a strong color and odor.

Allowing high levels of pesticides.

Ignoring health impacts.

Distillation

Reverse Osmosis

Evaporation

Electrodialysis

Reverse Osmosis

Distillation

Electrodialysis

Evaporation

It allows salt molecules to pass through.

It blocks water molecules while allowing salt molecules to pass.

It blocks salt molecules while allowing water molecules to pass.

It uses electric current to pull salt ions through.

97%

2%

50%

1%

Evaporation

Distillation

Filtration

Reverse osmosis

It increases the amount of saltwater.

It is essential for human communities and ecosystems.

It makes water taste better.

It reduces the Earth's temperature.