| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
The brain and spinal cord make up the __________ nervous system.
peripheral |
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somatic |
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central |
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autonomic |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
products |
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results |
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side effects |
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reactants |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
Which of the following is not a characteristic of the Sun?
is composed of hydrogen and helium |
|
formed 2.6 billion years ago |
|
is a yellow dwarf star |
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makes up over 99% of the mass of the solar system |
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.
An air mass is a large body of air that has which of the following characteristics?
all of these |
|
similar moisture |
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similar temperature |
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similar density |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
In the metric system, what prefix represents 103?
kilo |
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mega |
|
milli |
|
centi |
Kilo is the metric system prefix for 103.