| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
side effects |
|
reactants |
|
results |
|
products |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
Which of the following temperatures is least like the others?
0K |
|
32°F |
|
-273°C |
|
absolute zero |
Absolute zero is the coldest possible temperature in the universe. In the Kelvin scale, absolute zero is 0K and in the Celsius scale it is -273°C.
Convert 0C° to F°.
-32 |
|
32 |
|
0 |
|
16 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)
The hottest of Earth's atmospheric layers is which of the following?
troposphere |
|
thermosphere |
|
stratosphere |
|
mesosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
ventricle, atrium |
|
atrium, atrium |
|
ventricle, ventricle |
|
atrium, ventricle |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.