| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Which of the following states of matter exists at the highest temperature?
liquid |
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gas |
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none of these |
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solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
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esophagus |
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stomach |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Vector quantities are fully described by which of the following?
a direction only |
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a magnitude only |
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a magnitude and a direction |
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a direction and a polarity |
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: \(\vec{v}\)
All surface water is part of the:
atmosphere |
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hydrosphere |
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lithosphere |
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geosphere |
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).
Which of the following is not a characteristic of the Sun?
formed 2.6 billion years ago |
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makes up over 99% of the mass of the solar system |
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is a yellow dwarf star |
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is composed of hydrogen and helium |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.