| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
An air mass is a large body of air that has which of the following characteristics?
similar moisture |
|
all of these |
|
similar density |
|
similar temperature |
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.
In the food chain, consumers are classified as which of the following?
primary |
|
all of these |
|
tertiary |
|
secondary |
Most animals consume other organisms to survive. Consumers (heterotrophs) are divided into three types, primary, secondary, and tertiary, based on their place in the food chain.
An element in the physical state of __________ maintains a constant volume but their shape depends upon the shape of their container.
gas |
|
plasma |
|
solid |
|
liquid |
In the liquid state, molecules flow freely around each other and exist at a higher temperature range than the same substance in a solid state. Liquids maintain a constant volume but their shape depends upon the shape of their container.
pH is a scale that measures of how basic or acidic a solution is. A solution with a pH of 4 is:
neutral |
|
alkaline |
|
acidic |
|
basic |
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.
In the food chain, omnivores may be which of the following?
primary or tertiary consumers |
|
secondary or tertiary consumers |
|
primary or secondary consumers |
|
secondary consumers or scavengers |
Secondary or tertiary consumers may be omnivores.