| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
Which of these vitamins doesn't come from food?
D |
|
C |
|
Potassium |
|
A |
Vitamins are necessary for a wide variety of bodily processes. Some vitamins like Vitamins A and C come from diet but others, like Vitamin D, are generated in response to sunlight.
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
alkaline |
|
acid |
|
base |
|
solution |
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 taxonomy, domains are the broadest classification of life. How many domains are there?
3 |
|
6 |
|
5 |
|
dozens |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
Changes to an object's speed or direction of motion are caused by which of the following?
work |
|
power |
|
kinetic energy |
|
a force |
Force is applied to change an object's speed or direction of motion.
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
cerebrum |
|
medulla |
|
cerebellum |
|
brainstem |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).