| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.63 |
| Score | 0% | 73% |
Which of the following is not a method of heat transfer?
reflection |
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conduction |
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convection |
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radiation |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
An air mass is a large body of air that has which of the following characteristics?
similar temperature |
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similar density |
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similar moisture |
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all of these |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
The rate of vibration of sound is called:
period |
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frequency |
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volume |
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amplitude |
The rate of vibration of sound is called frequency and is measured in hertz (Hz). One hertz is one repetition per second and sounds with high frequency have a higher pitch than sounds with lower frequency. Humans can hear sounds in the range of 20 Hz to 20 kHz.
During digestion, where is digested food absorbed into the blood stream?
large intestine |
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stomach |
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small intestine |
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pancreas |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.
__________ is caused by a lack of Vitamin C.
scurvy |
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shingles |
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diabetes |
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anemia |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.