A water molecule has a positive end and a negative end, this is called what?
What is polarity?
When mixing sugar and water, water is called the
a.) solvent or b.) solute
What is solvent?
This is limestone. Acid rain caused the holes to form, what type of weathering is this?
What is chemical weathering?
Percent of salt water and freshwater on earth.
Salt water makes up 97%
Freshwater makes up 3%
Gas to a liquid? Example is a cloud forming.
What is condensation?
When a water molecule is attracted to or sticks to a solid surface.
What is adhesion?
What is The homogeneous mixture that results when a solute and a solvent combine.
What is a solution?
If water seeps into a crack in this rock and breaks it open, what type of weathering is that?
What is physical weathering?
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.
liquid to gas
What is evaporation?
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?
This is what gets dissolved.
solvent, solute or solution
When the wind picks up sand and moves it to a different location, this would be called what?
What is erosion?
Why does ice float - explain.
Evaporation of water through a plant's leaves, stems and flowers?
What is transpiration?
This causes a water droplet to get bigger and bigger
Adhesion or Cohesion
What is cohesion?
Why is water known as the "universal solvent"?
It dissolves more substances than any other liquid.
Thermal energy is heat energy. Does the process of evaporation involve low or high thermal energy?
What is high thermal energy?
What percent of the world does not have access to clean drinking water?
What is 29%?
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.
Name the charges in a water molecule.
Hydrogen side -
Oxygen side -
Hydrogen is more positive
Oxygen is more negative (gains 2 electrons)
Why can water dissolve more substances than any other liquid?
It's due to its polarity and hydrogen bonds.
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?
What are the three main uses of freshwater?
What is agriculture, industry, and public health?