ATI TEAS 7
Nursing Metric Conversion
1. In the metric system, what factor does the prefix kilo- represent?
- A. 10^3
- B. 10^2
- C. 10^4
- D. 10^6
Correct answer: A
Rationale: The prefix 'kilo-' in the metric system signifies a factor of 1000, which is equivalent to 10^3. Therefore, when using the prefix 'kilo-', it implies multiplying the base unit by 1000. For instance, one kilometer is equal to 1000 meters. Choices B, C, and D are incorrect as they do not accurately represent the factor associated with the prefix 'kilo-'.
2. How many milliliters are there in 0.5 liters?
- A. 500 milliliters
- B. 50 milliliters
- C. 5 milliliters
- D. 0.5 milliliters
Correct answer: A
Rationale: To convert liters to milliliters, you need to multiply by 1000 since there are 1000 milliliters in a liter. Therefore, 0.5 liters is equal to 500 milliliters. Choices B, C, and D are incorrect because they do not reflect the correct conversion from liters to milliliters.
3. Which metric prefix represents 10^-2?
- A. centi
- B. milli
- C. nano
- D. deci
Correct answer: A
Rationale: The metric prefix 'centi-' signifies 10^-2, denoting one-hundredth of a unit. For instance, 1 centimeter equals 0.01 of the base unit. Choice B, 'milli,' represents 10^-3, 'nano' in Choice C represents 10^-9, and 'deci' in Choice D stands for 10^-1. Therefore, the correct answer is 'centi.'
4. What is the equivalent of 0.3 mg in mcg?
- A. 300 mcg
- B. 30 mcg
- C. 3000 mcg
- D. 3 mcg
Correct answer: A
Rationale: To convert milligrams (mg) to micrograms (mcg), you need to multiply by 1000 since 1 mg is equal to 1000 mcg. Therefore, 0.3 mg x 1000 = 300 mcg. This conversion is crucial in healthcare to ensure accurate medication dosages. Choice B (30 mcg) is incorrect as it represents the conversion of 0.03 mg to mcg. Choice C (3000 mcg) is incorrect as it is the result of multiplying 0.3 mg by 10 instead of 1000. Choice D (3 mcg) is incorrect as it is the result of not multiplying by 1000 to convert milligrams to micrograms.
5. How many grams are in 0.5 kilograms?
- A. 50 grams
- B. 500 grams
- C. 5,000 grams
- D. 0.5 grams
Correct answer: B
Rationale: To convert kilograms to grams, you need to multiply by 1000 since there are 1000 grams in 1 kilogram. Therefore, 0.5 kilograms is equal to 500 grams (0.5 x 1000 = 500). Choice A (50 grams) is incorrect as it is the result of multiplying by 10 instead of 1000. Choice C (5,000 grams) is incorrect as it is the result of adding an extra zero. Choice D (0.5 grams) is incorrect as it represents the original amount in grams, not the converted amount.
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