| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
The __________ nervous system regulates involuntary activity in the heart, stomach, and intestines.
somatic |
|
peripheral |
|
central |
|
autonomic |
Part of the peripheral nervous system, the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
What kind of weather front is likely to create clouds and storms?
cold front |
|
stationary front |
|
temperate front |
|
warm front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
reactants |
|
isotopes |
|
products |
|
ions |
The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
Carbohydrates are found in:
animal sources |
|
sugars and starches |
|
vegetable oils |
|
food additives |
Carbohydrates are major sources of energy for the body and are found in sugars (fruit, cane sugar, beets) and starches (bread, rice, potatoes, pasta).
Which of the following does not represent the freezing point of water?
0°C |
|
32°F |
|
273K |
|
0°F |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.