| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.98 |
| Score | 0% | 60% |
Which of the following does not represent the freezing point of water?
273K |
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32°F |
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0°C |
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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.
Which of the following is true about species groups?
an ecosystem is a biological population |
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a population is made up of a group of communities |
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a community is made up of a group of populations |
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a biome is a made up of a group of biospheres |
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.
Velocity and displacement are fully described by both a magnitude and a direction. Velocity and displacement are which of the following?
combinational quantities |
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vector quantities |
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composite quantities |
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scalar 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: \(\vec{v}\)
The Rh factor antigen in blood determines:
blood type |
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universal recipient status |
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universal donor status |
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postive or negative |
Blood is categorized into four different types (A, B, AB, and O) based on the type of antigens found on the outside of the red blood cells. Additionally, each type can be negative or positive based on whether or not the cells have an antigen called the Rh factor.
The gravitational interaction of Earth and the Moon is responsible for which of these?
day and night cycle |
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seasons |
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tides |
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the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.