| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
__________ and __________ pair to strengthen bones.
vitamin D, calcium |
|
calcium, vitamin A |
|
vitamin D, magnesium |
|
iron, calcium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
atom |
|
electron |
|
proton |
|
neutron |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
An electrically charged atom is a(n):
ion |
|
proton |
|
neutron |
|
electron |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
potential |
|
inherent |
|
gravitational |
|
kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
Which of the following does not filter air as part of the respiratory system?
nasal cavity |
|
epiglottis |
|
pharynx |
|
trachea |
After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis which prevents food from entering the airway.