| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
Which of the following is the smallest component of an element that still retains the properties of the element?
molecule |
|
neutron |
|
element |
|
atom |
An atom is the smallest component of an element that still retains the properties of the element.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
ion |
|
base |
|
acid |
|
hydrogen |
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.
Minerals, vitamins, and fiber are:
proteins |
|
macronutrients |
|
carbohydrates |
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micronutrients |
Minterals, vitamins, and fiber are micronutrients while proteins, carbohydrates, and fats are macronutrients.
Which of the following temperatures is least like the others?
0K |
|
absolute zero |
|
-273°C |
|
32°F |
Absolute zero is the coldest possible temperature in the universe. In the Kelvin scale, absolute zero is 0K and in the Celsius scale it is -273°C.
An air mass is a large body of air that has which of the following characteristics?
all of these |
|
similar moisture |
|
similar temperature |
|
similar density |
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.