| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
saturated fat |
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protein |
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unsaturated fat |
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fiber |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.
Which of the following is the formula for work?
\(W = {\vec{F} \over \vec{d} }\) |
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\(W = {F}{d}\) |
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\(W = \vec{F}\vec{d}\) |
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\(W = {{F}\over{d}}\) |
Work is performed on an object when an applied force causes displacement along the same vector. Measured in joules (J) or newton-meter (Nm), work is calculated by multiplying force times displacement: \(W = \vec{F}\vec{d}\)
A transition zone between two air masses is called:
boundary |
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thunderstorm |
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fog |
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front |
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.
Which of the following describes the Earth's mantle?
liquid |
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primarily solid |
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primarily liquid |
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solid |
Mantle makes up 84% of the Earth's volume and has an average thickness of approximately 1,800 miles (2,900 km). It is dense, hot, and primarily solid although in places it behaves more like a viscous fluid as the plates of the upper mantle and crust gradually "float" along its circumference.
What part of the food chain serves only as food for other organisms?
primary consumers |
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producers |
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secondary consumers |
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decomposers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis