| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Which of the following temperatures is least like the others?
32°F |
|
-273°C |
|
absolute zero |
|
0K |
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.
Large, puffy, mid-altitude clouds with a flat base and a rounded top describe which of the following?
cirrus clouds |
|
cumulus clouds |
|
stratus clouds |
|
fog |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
__________ is caused by a lack of iron in the diet.
diabetes |
|
anemia |
|
scurvy |
|
shingles |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
Vector quantities are fully described by which of the following?
a magnitude and a direction |
|
a direction and a polarity |
|
a magnitude only |
|
a direction only |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
Earth's history is divided into time periods, which of these is the longest time period?
era |
|
eon |
|
epoch |
|
age |
The Earth is approximately 4.6 billion years old and its history is divided into time periods based on the events that took place and the forms of life that were dominant during those periods. The largest graduation of time is the eon and each eon is subdivided into eras, eras into periods, periods into epochs, and epochs into ages.