| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
An air mass is a large body of air that has which of the following characteristics?
similar density |
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similar moisture |
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all of these |
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similar temperature |
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.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
products |
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reactants |
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side effects |
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results |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
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stomach |
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esophagus |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is the primary difference between a comet and an asteroid?
asteroids have a coma |
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comets have an atmosphere |
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comets orbit the Sun |
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asteroids contain frozen water |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
Which of blood component carries oxygen?
platelets |
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red blood cells |
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white blood cells |
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plasma |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.