Chemistry and Properties
Water Molecules
Additional terms
Potluck
Potluck 2
100
Composed of 2 hydrogen atoms & one oxygen atom
What is water?
100

A water molecule has a positive end and a negative end, this is called what?

What is polarity?  

100

When mixing sugar and water, water is called the 

a.) solvent or b.) solute

What is solvent?

100

This is limestone.  Acid rain caused the holes to form, what type of weathering is this?

What is chemical weathering?

100

Percent of salt water and freshwater on earth.

Salt water makes up 97%

Freshwater makes up 3%

200

Gas to a liquid? Example is a cloud forming.

What is condensation?

200

When a water molecule is attracted to or sticks to a solid surface.

What is adhesion?

200

What is The homogeneous mixture that results when a solute and a solvent combine.

What is a solution?

200

If water seeps into a crack in this rock and breaks it open, what type of weathering is that?



What is physical weathering?

200

Percent of water in living organisms and covering the earth?

Living organisms - 70%

Earth covered in water is 71-75% Any value from 71-75% is acceptable.

300

liquid to gas

What is evaporation?

300

When water molecules join tightly at the top of a stream and allows certain bugs to "walk" on water.  This is due to ___?

What is surface tension?

300

This is what gets dissolved.

solvent, solute or solution

What is the solute?
300

When the wind picks up sand and moves it to a different location, this would be called what?

What is erosion?

300

Why does ice float - explain.

The molecule expands when it freezes which makes ice less dense than water.
400

Evaporation of water through a plant's leaves, stems and flowers?

What is transpiration?

400

This causes a water droplet to get bigger and bigger

Adhesion or Cohesion

What is cohesion?

400

Why is water known as the "universal solvent"?

It dissolves more substances than any other liquid.


400

Thermal energy is heat energy. Does the process of evaporation involve low or high thermal energy?

What is high thermal energy?

400

What percent of the world does not have access to clean drinking water? 

What is 29%?

500

2 part question:

a.) How many elements are in H2O?

b.) How many atoms are in 3 molecules of H2O?

a.) 2 elements - hydrogen and oxygen

b.)  H2O + H2O + H2O = 6 Hydrogen and 3 Oxygen: which totals 9 atoms.

500

Name the charges in a water molecule.

Hydrogen side - 

Oxygen side - 

Hydrogen is more positive

Oxygen is more negative (gains 2 electrons)

500

Why can water dissolve more substances than any other liquid?

It's due to its polarity and hydrogen bonds.

500

The amount of energy it takes to raise the temperature 1 degree.  Example: A piece of metal in the sun would heat up quickly.

What is heat capacity?

500

What are the three main uses of freshwater?

What is agriculture, industry, and public health?

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