| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
Which of these does not contain oxygenated blood?
pulmonary vein |
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right atrium |
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aorta |
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left ventricle |
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.
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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similar temperature |
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all of these |
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.
A major difference between sound waves and light waves is which of the following?
a sound wave cannot travel through a vacuum |
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a sound wave is much slower than a light wave |
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a sound wave is mechanical while a light wave is electromagnetic |
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all of these are correct |
A vibrating object produces a sound wave that travels outwardly from the object through a medium (any liquid or solid matter). The vibration disturbs the particles in the surrounding medium, those particles disturb the particules next to them, and so on, as the sound propagates away from the vibration.
Which of the following is not a base unit in the metric system?
gram |
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degree Fahrenheit |
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meter |
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liter |
The Fahrenheit scale is used for measuring temperature in the British system. The metric system uses the Celsius scale.
Minerals, vitamins, and fiber are:
micronutrients |
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proteins |
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macronutrients |
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carbohydrates |
Minterals, vitamins, and fiber are micronutrients while proteins, carbohydrates, and fats are macronutrients.