am him fr

What is the chemical formula for water?

• NaCl

At what temperature does water boil at sea level?

• 100°C

• 90°C

• 120°C

• 80°C

What percentage of the Earth's surface is covered by water?

• 51%

• 61%

• 71%

• 81%

What is the primary source of water vapor that forms clouds?

• Plants

• Oceans

• Animals

• Soil

Which state of matter is water in its natural form at room temperature?

• Solid

• Liquid

• Gas

• Plasma

What process describes the movement of water from the Earth's surface to the atmosphere and back?

• Condensation

• Precipitation

• Evaporation

• Water cycle

Which of the following is not a form of water?

• Ice

• Steam

• Dew

• Sand

What is the term for the amount of salt dissolved in water?

• Acidity

• Alkalinity

• Salinity

• Hardness

Which of these is a method to make seawater drinkable?

• Filtration

• Desalination

• Condensation

• Coagulation

What is the phenomenon where water sticks to other substances?

• Cohesion

• Adhesion

• Capillary action

• Surface tension