Polarity
The atoms that compose H2O.
2 hydrogen atoms and 1 oxygen atom.
Water molecules attract to each other because of this.
Their polarity.
Water's polarity allows it to do this to other polar substances.
Dissolve.
The force that makes the surface of a liquid act like a stretched elastic sheet.
Surface tension.
The freezing point of water in degrees Celsius.
0 degrees Celsius.
The way a hydrogen atom is charged (- or +).
Positively charged.
A (metal) example of opposites attracting.
Magnets.
True or false: Most solids dissolve better when the temperature increases.
True.
This liquid has the highest surface tension on Earth.
Water.
0 degrees Celsius in Fahrenheit.
32 degrees Fahrenheit.
The way an oxygen atom is charged (- or +).
Negatively charged.
This is responsible for water molecules sticking together, giving water its cohesion.
Hydrogen bond.
This term describes the substance that does the dissolving in a solution.
A solvent.
Molecules at the surface of water "stick together" through this.
Cohesion.
True or false: A substance's melting point is always different from its freezing point.
False.
When two hydrogen atoms and one oxygen atom bond, their molecular structure gives the water molecule this.
Polarity (electrical charge).
When water freezes, hydrogen bonds hold the molecules farther apart, causing this unusual property of ice.
Ice being less dense than liquid water (so it floats).
When no more solute can dissolve in a solvent at a certain temperature, the solution is called this.
Saturated solution.
This allows water to move through plant roots and stems and the smallest blood vessels.
Surface tension.
True or false: Salt added to ice causes the temperature to go down.
True.
A molecule with several highly polar bonds can be this.
Either polar or nonpolar (trick question).
Hydrogen bonds are weaker than this type of bond.
Covalent bonds.
Water carries _________ chemicals, minerals, and nutrients used to support living things.
Dissolved.
Water's unusually high surface tension is caused by this type of strong attraction between its molecules.
Hydrogen bonds.
The temperature may be lower if there are impurities in the water, or if this occurs.
Supercooling.