| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
Which of the following is the smallest component of an element that still retains the properties of the element?
atom |
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element |
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neutron |
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molecule |
An atom is the smallest component of an element that still retains the properties of the element.
Which of the following is not one of the outer planets?
Jupiter |
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Uranus |
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Neptune |
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Venus |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
Which of these layers is found directly below the Earth's crust?
outer core |
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continents |
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mantle |
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inner core |
The crust is the Earth's outermost layer and is divided into oceanic and continental types. Oceanic crust is 3 miles (5 km) to 6 miles (10 km) thick and is composed primarily of denser rock. Continental crust is 20 to 30 miles (30 to 50 km) thick and composed primarily of less dense rock. The crust makes up approximately one percent of the Earth's total volume.
Which of the following is the formula for power?
\(P = {w \over t}\) |
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\(P = \vec{w}t\) |
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\(P = w t\) |
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\(P = {\vec{w} \over t}\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
An air mass is a large body of air that has which of the following characteristics?
similar density |
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all of these |
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similar moisture |
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similar temperature |
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.