|
What is meant by polarity? |
Opposite charges attract. |
|
Which end of the water molecule attracts most of the electrons and act negative? |
Oxygen atom. |
|
Which end of the water molecule attracts most of the electrons and act positive? |
Hydrogen atom. |
|
How do water molecules act like "little magnets" ? |
The hydrogen is attracted to the oxygen. |
|
What is a solvent? |
The substance in which the solve is dissolved. |
|
Why is water called a universal solvent? |
It can break anything that was together with polar substances. |
|
What is a solute? |
A substance dissolved in the solvent. |
|
Which type of molecules, polar or non-polar, dissolves in water? |
Polar. |
|
Are materials that dissolve in water hydrophilic or hydrophobic? |
Hydrophilic. |
|
What is cohesion? |
An attractive force that holds molecules of a single substance together. |
|
Cohesion produces _______ tensions as the water molecules hold tightly together. |
Surface. |
|
How do living things like insects use surface tension? |
They run on water without breaking the surface. |
|
Define adhesion. |
The attractive force between two particles of different substances. |
|
Adhesion produces an effect called ________ action when you place a straw in a liquid. |
Capillary. |
|
Explain how adhesion and cohesion help plants move materials. |
It contributes to the upward movement of the water from the roots of plants. |
|
When is water the densest? |
When it is liquid water. |
|
Explain why ice floats? |
Liquid water is more dense than solid water. |
|
How is a lake or river that freezes over helpful to the organisms in the water? |
Protects it from the cold breeze. |
Share This
Flashcard
