| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
What part of the nervous system controls simple reflexes?
spinal cord |
|
autonomic |
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cerebrum |
|
medulla |
The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.
Water freezing or boiling is an example of which of the following?
phase transition |
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heating |
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cooling |
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sublimation |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
protons |
|
atomic mass units |
|
electron shells |
|
electrons |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
__________ is caused by a lack of Vitamin C.
anemia |
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shingles |
|
diabetes |
|
scurvy |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.
The formula \(\vec{F_{g}} = { Gm_{1}m_{2} \over r^2}\) applies to which of Newton's laws?
first law of motion |
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third law of motion |
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second law of motion |
|
universal gravitation |
Newton's law of universal gravitation defines gravity: All objects in the universe attract each other with an equal force that varies directly as a product of their masses, and inversely as a square of their distance from each other. Expressed as a formula: \(\vec{F_{g}} = { Gm_{1}m_{2} \over r^2}\) where r is the distance between the two objects and G is the gravitational constant with a value of 6.67 x 10-11.