| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
Which of the following is not a characteristic of the Sun?
makes up over 99% of the mass of the solar system |
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formed 2.6 billion years ago |
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is composed of hydrogen and helium |
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is a yellow dwarf star |
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.
Which of the following is the narrowest classification of life?
domain |
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species |
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family |
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genus |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
inherent |
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gravitational |
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kinetic |
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potential |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
In cell biology, the primary difference between anaerobic and aerobic respiration is that aerobic respiration requires:
mitochondria |
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water |
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oxygen |
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sugar |
Some plant cells produce their own energy through photosynthesis which is the process by which sunlight, carbon dioxide, and water react to make sugar and oxygen. Animal cells cannot produce their own energy and, instead, generate energy when mitochondria consume outside sugar and oxygen through aerobic respiration.
Which of the following states of matter exists at the highest temperature?
none of these |
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solid |
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gas |
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liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.