Lesson: Water Properties

Warm Ups, etc:

Water is WET - introductory warm-up in which students identify five properties of water (both physical and chemical) #content  #criticalthinking

GrapH2Os - students interpret graphs about properties of water  #content  #criticalthinking

Lecture Notes:#content 

Water Properties

Physical properties

Water & Temperature

-Water has a boiling point of 100°C (212° F) and a freezing point of 0°C (32° F)

At these temperatures water goes through phase changes from liquid to either vapor/steam or solid/ice

-Pure fresh water at room temperature has a density of 1g/mL, but this changes with temperature changes (cold water is more dense and sinks, yet ice is less dense dense and floats) which helps circulate water

-Water absorbs and releases heat slowly - insulation

-Water expands when it freezes

Water & Light

-Water transmits and absorbs light (Deeper -> Darker -> Dark)

-Ice reflects light

Water & Energy

-Water has cohesion (sticks to itself) and adhesion (sticks to other things)

-Water in motion has kinetic energy and can carry and weather/erode

Water & Pressure

-Water pressure increases steadily as you go deeper (up by a factor of 1 every 10m/33ft)

Chemical properties

-Water is a good solvent of solutes into solution

-Water reacts and promotes chemical reactions

*acid/base

*salts

*gases

*assembly and break down of organic molecules

*easily carries chemical pollutants

Objectives and Vocabulary:#content 

 Water Properties

1. What are the physical properties of water?

2. What are the chemical properties of water?

3. What roles does water play in regards to abiotic factors?

4. What roles does water play in regards to biotic factors?

5. Explain how humans need and use water in terms of social systems (home/economics/industry/agriculture/energy...)

Water

Cohesion

Adhesion

Weathering

Solvent/Solute/Solution

Acids and Bases

Salts

Organic molecules

Activities, Assignments, Etc.

Class Brainstorm - Water Properties - students share their knowledge of water's physical and chemical properties. Examples are discussed and classified. 

#content #collaboration #communication #criticalthinking

Group/Paired Partner- Water's Impact - Students need to come up with lists of water's impact on life, the physical environment, and humans.The work in pairs, but rotate, discussing the examples they and those they have already talked to have shared. Each student should create a document that lists their examples.

#content #collaboration #communication #criticalthinking