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
Is this a solar or lunar eclipse?
What is solar eclipse?
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
Gravity is affected by two main things. Mass and distance. What picture below has the greatest gravitation pull?
A) larger mass
200
What moon phase would we on Earth see?
What is New Moon?
200
Two part answer: (Get with 5% of correct answer)
Percent of water in living organisms?
Percent of water 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
The atoms combined to form a new substance. Is this a balanced equation? Why or Why not?
No. There are 2 hydrogen on the left side and 3 hydrogen on the right side.
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
Pick 3 answers that explain Earth correctly:
Terrestrial/rocky, gas giant, 4th planet from sun, atmosphere that protects us, nitrogen is the most abundant element in our atmosphere, oxygen is most abundant element in our atmosphere
Terrestrial/rocky, atmosphere that protects us and nitrogen is most abundant element in our atmosphere
400
What percent of the world does not have access to clean drinking water? (Get within 10% of correct answer to get points)
What is 29%?
500
Does water have a high or low heat capacity?
Water has a high heat capacity. It takes a lot of energy to raise it one degree Celsius.
500
Name the charges in a water molecule.
Hydrogen side -
Oxygen side -
Hydrogen is more positive (Say Hi with a smile) :)
Oxygen is more negative (gains 2 electrons)
500
Water is the Universal Solvent and can dissolve more substances than any other liquid? Why can it dissolve more substances - like sugar and salt?
It's due to its polarity and hydrogen bonds.
500
The amount of energy it takes to raise the temperature 1 degree Celsius is called heat capacity. Which has a higher heat capacity: oceans or land?
Oceans have a higher heat capacity. That's why the sand on a beach is hot, but the ocean feels cool.
500
What are the three main uses of freshwater?
What is agriculture, industry, and public health?