| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
Which of the following is the narrowest classification of life?
family |
|
species |
|
genus |
|
domain |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
Which of the following states of matter exists at the highest temperature?
none of these |
|
liquid |
|
gas |
|
solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
hydrogen |
|
acid |
|
ion |
|
base |
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 metric system, what prefix represents 10-3?
milli |
|
kilo |
|
mega |
|
centi |
In the metric system, milli is the prefix for 10-3.
In the foood chain, producers serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through:
chemosynthesis |
|
photosynthesis |
|
decomposition |
|
autotrophs |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis