| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.95 |
| Score | 0% | 59% |
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
cerebrum |
|
brainstem |
|
cerebellum |
|
medulla |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
Molecules and atoms that are inputs to a chemical reaction are known as which of the following?
fuel |
|
products |
|
reactants |
|
components |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
The ozone layer is in which of Earth's atmospheric layers?
stratosphere |
|
troposphere |
|
thermosphere |
|
mesosphere |
The stratosphere is just above the troposphere and is stratified in temperature with warmer layers higher and cooler layers closer to Earth. This increase in temperature is a result of absorption of the Sun's radiation by the ozone layer.
Which of the following temperatures is least like the others?
absolute zero |
|
0K |
|
32°F |
|
-273°C |
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.
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
red blood cells |
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veins |
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arteries |
|
capillaries |
Capillaries are small thin-walled vessels that permit the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells. This process of exchange is called diffusion.