| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.02 |
| Score | 0% | 60% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
the northern lights |
|
tides |
|
seasons |
|
day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.
"The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object." This describes which of Newton's laws of motion?
first |
|
third |
|
second |
|
fourth |
Newton's second law of motion states that The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. This law basically means that the greater the mass of an object, the more force is needed to overcome its inertia.
Neurons are part of the __________ nervous system.
peripheral |
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somatic |
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autonomic |
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central |
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?
reactants |
|
products |
|
side effects |
|
results |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
In the metric system, what prefix represents 10-3?
centi |
|
kilo |
|
mega |
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milli |
In the metric system, milli is the prefix for 10-3.