| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
Water freezing or boiling is an example of which of the following?
heating |
|
phase transition |
|
sublimation |
|
cooling |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
An air mass is a large body of air that has which of the following characteristics?
similar moisture |
|
similar density |
|
similar temperature |
|
all of these |
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.
In which type of compound does one atom borrow an electron from another atom?
ionic |
|
covalent |
|
chemical |
|
acidic |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. 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.
Which of the following states of matter exists at the highest temperature?
none of these |
|
gas |
|
solid |
|
liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
The __________ nervous system controls voluntary actions.
central |
|
peripheral |
|
autonomic |
|
somatic |
Part of the peripheral nervous system, the somatic nervous system is made up of nerve fibers that send sensory information to the central nervous system and control voluntary actions.