| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.27 |
| Score | 0% | 65% |
Which is the proper order of Earth's atmospheric layers from the surface up to space?
troposphere, stratosphere, mesosphere, thermosphere |
|
mesosphere, thermosphere, stratosphere, troposphere |
|
stratosphere, troposphere, mesosphere, thermosphere |
|
thermosphere, mesosphere, stratosphere, troposphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
In cell biology, the primary difference between anaerobic and aerobic respiration is that aerobic respiration requires:
mitochondria |
|
sugar |
|
oxygen |
|
water |
Some plant cells produce their own energy through photosynthesis which is the process by which sunlight, carbon dioxide, and water react to make sugar and oxygen. Animal cells cannot produce their own energy and, instead, generate energy when mitochondria consume outside sugar and oxygen through aerobic respiration.
The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?
Doppler effect |
|
sound radiation |
|
refraction |
|
reflection |
The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.
Which of the following states of matter exists at the highest temperature?
none of these |
|
solid |
|
gas |
|
liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
In the metric system, what prefix represents 103?
kilo |
|
centi |
|
milli |
|
mega |
Kilo is the metric system prefix for 103.