| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
__________ is caused by a lack of iron in the diet.
anemia |
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diabetes |
|
shingles |
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scurvy |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
A transition zone between two air masses is called:
front |
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boundary |
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fog |
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thunderstorm |
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.
The large intestine does which of the following?
breaks down proteins |
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breaks down fats |
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processes the physical waste produced by digestion |
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breaks down starches |
The large intestine (colon) follows the small intestine and processes the physical waste produced by digestion, absorbing water and minerials that remain back into the body. Solid waste is then stored in the rectum while liquid waste is stored in the bladder.
Which of the following is not a characteristic of the Sun?
formed 2.6 billion years ago |
|
makes up over 99% of the mass of the solar system |
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is a yellow dwarf star |
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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.
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
ventricle, ventricle |
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atrium, ventricle |
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ventricle, atrium |
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atrium, atrium |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.