click below
click below
Normal Size Small Size show me how
Ch 6 Study Guide
Question | Answer |
---|---|
In a water molecule, electrons are shared equally between the hydrogen atoms and oxygen atom. | False |
The attration of opposite charges between hydrogen and oxygen forms a weak oxygen bond. | False. |
Becuase of its polarity, water can move from the roots of a plants up to its leaves. | True |
Water changes temperature easily. | False. |
Unlike most substances, water expands when it freezes. | True. |
What do all objects in motion have? | Kinetic energy/ |
Who was the first scientist to observe evidence of the random motion of molecules? | Brown. |
What is the net movement of particles from an area of higher cncentration to an area of lower concentration? | Diffusion. |
What is it called when a few drops of colored corn syrup are added to a beaker of pure conrn syrup, the color will do it what? | Start a diffuse. |
Diffusion can be accelerated by what? | Increasing the temperature. |
When materials pass into and out of a cell at equal rates, there is no net change in concerntration inside the cell. The cell is in a state of what? | Dynamic equilibrium. |
What is the difference in concentration of a substance across space is called what? | Concentration gradient |
Diffusion occurs because of what? | Random movement of particles. |