| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.49 |
| Score | 0% | 70% |
The heat from the Sun traveling to Earth is an example of which of the following?
radiation |
|
convection |
|
electricity |
|
conduction |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
In fermentation, what replaces oxygen in anaerobic respiration?
water |
|
lactic acid or alcohol |
|
starches |
|
ascorbic acid or peptides |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
Which of the following temperatures is least like the others?
absolute zero |
|
32°F |
|
-273°C |
|
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.
Which part of the respiratory system helps protect against infection?
pharynx |
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trachea |
|
nasal cavity |
|
epiglottis |
After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis, responsible for preventing food from entering the airway.
Which of these is important for the body's maintenance, growth, and repair?
fiber |
|
carbohydrates |
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protein |
|
fats |
Found in both animal sources (meat, fish, eggs, cheese) and vegetables (beans, nuts, some grains), proteins are important for the body's maintenance, growth, and repair.