| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.78 |
| Score | 0% | 76% |
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
atom |
|
electron |
|
proton |
|
neutron |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.
Water freezing or boiling is an example of which of the following?
cooling |
|
phase transition |
|
heating |
|
sublimation |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
The respiratory and circulatory systems are similar in that they:
deoxygenate blood |
|
add carbon dioxide |
|
transport nutrients |
|
transport oxygen |
Like the respiratory system, the circulatory system serves to transport oxygen throughout the body while removing carbon dioxide. In addition, the circulatory system transports nutrients from the digestive system.
The transfer of heat by the circulation or movement of the heated parts of a liquid or gas is called:
convection |
|
radiation |
|
conduction |
|
diffusion |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. Examples of heat transfer by convection include water coming to a boil on a stove, ice melting, and steam from a cup of coffee.
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.