Metric Conversions for TEAS 7

Correct Answer: B

Rationale: The correct answer is B: balance scale. A balance scale is used to measure the mass of an object by comparing it to a set of known masses. It works on the principle of equilibrium, where the object's mass is balanced by adding or removing known masses until the scale is level. Choice A, thermometer, measures temperature, not mass. Choice C, scale, is a general term and could refer to different types of scales, but a balance scale specifically measures mass. Choice D, caliper, is used to measure dimensions such as length or diameter, not mass. Therefore, the balance scale is the correct choice for measuring mass accurately.

Correct Answer: A

Rationale: To convert milligrams (mg) to micrograms (mcg), you need to multiply by 1000 since 1 mg = 1000 mcg. Therefore, 0.3 mg would be equal to 0.3 * 1000 = 300 mcg. This makes choice A (300 mcg) the correct answer. Choices B, C, and D are incorrect because they do not apply the correct conversion factor of 1000 to convert from mg to mcg, leading to incorrect values.

Correct Answer: C

Rationale: To convert kilograms to grams, we need to multiply the number of kilograms by 1000 since there are 1000 grams in 1 kilogram. Therefore, to find out how many grams are in 5 kilograms, we multiply 5 by 1000, which equals 5000 grams. The correct answer is C. A: 50 grams - Incorrect. 5 kilograms is equal to 5000 grams, not 50 grams. B: 500 grams - Incorrect. 5 kilograms is equal to 5000 grams, not 500 grams. D: 5 grams - Incorrect. 5 kilograms is equal to 5000 grams, not 5 grams.

Correct Answer: A

Rationale: To convert grams to kilograms, you need to divide by 1000 since there are 1000 grams in 1 kilogram. Therefore, 34.5 grams divided by 1000 equals 0.0345 kilograms or 3.45 kg (A). The other choices are incorrect because B is the original value in kg, C is 100 times the value in kg, and D is the original value in grams.

Correct Answer: D

Rationale: The correct answer is D: 1000 milliliters. 1 liter is equivalent to 1000 milliliters. This is because the metric system is based on the powers of 10, so there are 1000 milliliters in 1 liter. Choice A, 1 kilogram, is a unit of mass and not volume. Choice B, 1 quart, is a unit of volume but is not equivalent to 1 liter. Choice C, 1 milliliter, is much smaller than 1 liter, as it would take 1000 milliliters to make up 1 liter.