| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.63 |
| Score | 0% | 53% |
-40°F is how many °C?
\({40 \over 9}\) |
|
-40 |
|
-8 |
|
\(-{40 \over 9}\) |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
Which of the following describes the Earth's outer core?
primarily solid |
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solid |
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makes up most of the Earth's volume |
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liquid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
Which of the following is not true about mass and weight?
mass is the amount of matter something has |
|
mass depends on the location where it is measured |
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weight depends on the location where it is measured |
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weight is the force exerted on an object by gravity |
Mass is the amount of matter something has while weight is the force exerted on an object's mass by gravity. So, although a person's mass doesn't change when going from the Earth to the Moon, their weight will decrease because the force of the Moon's gravity is much less than that of Earth.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
small intestine |
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mouth |
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large intestine |
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stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following temperatures is least like the others?
absolute zero |
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32°F |
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-273°C |
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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.