II.3. Water uses.

What is water used for (uses)

• to drink it;
• food;
• washed;
• personal hygiene;
• watered animals;
• watering plants;
• solvent for obtaining solutions of practical importance, for example:
  • saline solution;
  • baking soda solution used for first aid in cases of acid burns.
• in factories and factories;
• living environment for the plants and animals that live in it;
• transport route;
• raw material;
• energy source (hydropower plants).

How to explain hand and laundry washing

Water alone cannot remove dirt from hands or laundry.

Soap (detergent) decreases the cohesive (attracting) force between water molecules and shrinks greasy dirt particles. This is how the soap / detergent removes dirt from the hands / laundry and spreads it in water, away from the washed object.