| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
respiration |
|
circulation |
|
digestion |
|
nervous |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
Which of the following states of matter exists at the highest temperature?
gas |
|
liquid |
|
solid |
|
none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
protons |
|
electrons |
|
atomic mass units |
|
electron shells |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
molecule |
|
element |
|
compound |
|
atom |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
Arteries carry __________ blood at __________ pressure.
deoxygenated, high |
|
oxygenated, high |
|
deoxygenated, low |
|
oxygenated, low |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.