| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
|
the northern lights |
|
day and night cycle |
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tides |
Tides are caused by the gravitational interaction of Earth and the Moon.
A __________ is the smallest multi-atom particle of an element or compound that can exist and still retain the characteristics of the element or compound.
ion |
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isotope |
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molecule |
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neutron |
A molecule is the smallest multi-atom particle of an element or compound that can exist and still retain the characteristics of the element or compound. The molecules of elements consist of two or more similar atoms, the molecules of compounds consist of two or more different atoms.
Which of these is not a type of fat?
monounsaturated |
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saturated |
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polyunsaturated |
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cholesterol |
Fats come in three types, saturated (meats, shellfish, eggs, milk), monounsaturated (olives, almonds, avocados), and polyunsaturated (vegetable oils).
The coldest point in the Earth's atmosphere is reached in which atmospheric layer?
troposphere |
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thermosphere |
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stratosphere |
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mesosphere |
In the mesosphere, temperature again drops as altitude increases until the coldest point in the Earth's atmosphere, the mesopause, is reached where temperatures fall to −225 °F (−143 °C).
Which of the following is not a characteristic of the Sun?
makes up over 99% of the mass of the solar system |
|
is a yellow dwarf star |
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formed 2.6 billion years ago |
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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.