Question | Answer |
The chemical formula for water is | H2O |
Water is made up of | one oxygen atom bonded with two hydrogen atoms |
Why is water polar? | Each end of the molecule has a slight electric charge. |
The positive hydrogen ends of one water molecule atttract to | the negative oxygen ends of another water molecule. |
surface tension | teh tightness across thece of water caused by water molecules pulling on each other. |
capillary action | is due to the attraction among molecules of water and surrounding materials |
solution | a mixture that forms when one substance dissolves another |
solvent | the substance that does the dissolving |
solute | the substance that is present in a solution in a smaller amount |
water is called the universal solvent because | it can dissolve so many substances |
list the three states of matter | solid, liquid, gas |
evaporation | occurs as water molecules at the surface of a liquid absorb energy and turn into a gas. |
condensation | occurs when gaseous water moleules slow down, losing energy, and turn into a liquid |
specific heat | the amount of thermal energy required to raise the temperature of one kilogram of a substance by one degree Celcius. |
Why does ice float? | It is less dense than liquid water. |
What is a suspension? | a mixture in which particles can be seen and easily separated by settling or filtration. |
What is a solution? | a well mixed mixture |
How can you separate salt from water? | by evaporation |
In a solution, the ________ is dissolved by the solvent. | solute |