| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.87 |
| Score | 0% | 57% |
Velocity and displacement are fully described by both a magnitude and a direction. Velocity and displacement are which of the following?
scalar quantities |
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combinational quantities |
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vector quantities |
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composite quantities |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
Which of the following is true about species groups?
a population is made up of a group of communities |
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a biome is a made up of a group of biospheres |
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a community is made up of a group of populations |
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an ecosystem is a biological population |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.
Which of the following does not represent the freezing point of water?
0°C |
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273K |
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32°F |
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0°F |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.
An asteroid belt holds many of the asteroids in our solar system. It is located between the orbits of which planets?
Mars and Earth |
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Mercury and Venus |
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Mars and Jupiter |
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Jupiter and Saturn |
The solar system also contains over a million rocky fragments of at least 1km in diameter called asteroids as well as millions more with smaller diameters. Many of these asteroids are an asteroid belt between the orbits of Mars and Jupiter.
As part of digestion, the liver produces bile which breaks down:
fat |
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sugars |
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starches |
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protein |
The liver produces bile which emulsifies (separates) fat.