Metric Conversions for TEAS 7

Correct Answer: B

Rationale: To convert 0.1 liters to milliliters, you need to multiply by 1000 since there are 1000 milliliters in 1 liter. So, 0.1 * 1000 = 100 ml, which is the correct answer (B). Choice A (10 ml) is incorrect as it represents 0.01 liters, choice C (1000 ml) is incorrect as it represents 1 liter, and choice D (1 ml) is incorrect as it is too small for 0.1 liters.

Correct Answer: A

Rationale: To convert liters to milliliters, you multiply by 1000 since 1 liter = 1000 ml. Therefore, 0.5 liters x 1000 = 500 ml. Thus, the correct answer is A (500 ml). Choice B (50 ml) is incorrect as it is 10 times smaller than the correct answer. Choice C (5 ml) is incorrect as it is 100 times smaller than the correct answer. Choice D (0.5 ml) is incorrect as it is the same value in milliliters, not the conversion of liters to milliliters.

Correct Answer: A

Rationale: To convert grams to milligrams, you multiply by 1000 since 1 gram = 1000 milligrams. Therefore, 0.4 grams x 1000 = 400 mg. Choice A (400 mg) is correct. Choices B, C, and D are incorrect because they do not follow the correct conversion factor of 1 gram = 1000 milligrams.

Correct Answer: A

Rationale: To convert 0.75 to a fraction, we write it as 75/100 and simplify to 3/4 by dividing both numerator and denominator by the greatest common divisor, which is 25. Choice A (3/4) is correct as it represents 0.75 in simplest form. Choices B, C, and D are incorrect because they do not equal 0.75 when converted to a fraction. Choice B (7/10) simplifies to 0.7, choice C (15/20) simplifies to 0.75 but is not in simplest form, and choice D (1/2) simplifies to 0.5.

Correct Answer: A

Rationale: To convert nanometers to meters, we need to remember that nano- is a prefix meaning 10^-9. Therefore, 1 nanometer is equal to 10^-9 meters. So, the correct answer is A: 10^-9 meters. Explanation for why other choices are incorrect: - B: 10^-6 meters is the equivalent of a micrometer, not a nanometer. - C: 10^-12 meters is the equivalent of a picometer, which is smaller than a nanometer. - D: 10^-15 meters is the equivalent of a femtometer, which is much smaller than a nanometer.