| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
__________ is caused by a lack of iron in the diet.
diabetes |
|
shingles |
|
anemia |
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scurvy |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
The heart __________ blood.
filters |
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oxygenates |
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deoxygenates |
|
creates |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
The coldest point in the Earth's atmosphere is reached in which atmospheric layer?
troposphere |
|
stratosphere |
|
mesosphere |
|
thermosphere |
In the mesosphere, temperature again drops as altitude increases until the coldest point in the Earth's atmosphere, the mesopause, is reached where temperatures fall to −225 °F (−143 °C).
The number system most used in science is the:
British system |
|
American system |
|
English system |
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metric system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
products |
|
reactants |
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results |
|
side effects |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).