| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
A transition zone between two air masses is called:
front |
|
thunderstorm |
|
fog |
|
boundary |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
hydrogen |
|
base |
|
acid |
|
ion |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.
Which of the following is not a base unit in the metric system?
meter |
|
degree Fahrenheit |
|
gram |
|
liter |
The Fahrenheit scale is used for measuring temperature in the British system. The metric system uses the Celsius scale.
__________ is caused by a lack of Vitamin C.
scurvy |
|
diabetes |
|
shingles |
|
anemia |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.
In cell biology, where does DNA replication take place?
nucleus |
|
Golgi apparatus |
|
mitochondria |
|
cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.