| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
The four planets closest to the Sun are called terrestrial. What does terrestrial mean?
the planets have magnetic fields |
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the planets are Earth-like |
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the planets have moons |
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the planets have water |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
Which of these digestive enzymes is not produced by the pancreas?
pancreatic amylase |
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trypsin |
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gastric acid |
|
lipase |
The acids produced by the pancreas contain several enzymes that aid in digestion. Lipase converts fat to glycerol and fatty acids. Pancreatic amylase breaks down complex carbohydrates into simple sugars. Trypsin converts polypeptides (the building blocks of protein) into amino acids.
Convert 0C° to F°.
0 |
|
32 |
|
16 |
|
-32 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)
A major difference between sound waves and light waves is which of the following?
all of these are correct |
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a sound wave cannot travel through a vacuum |
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a sound wave is much slower than a light wave |
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a sound wave is mechanical while a light wave is electromagnetic |
A vibrating object produces a sound wave that travels outwardly from the object through a medium (any liquid or solid matter). The vibration disturbs the particles in the surrounding medium, those particles disturb the particules next to them, and so on, as the sound propagates away from the vibration.
Which of the following temperatures is least like the others?
absolute zero |
|
32°F |
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-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.