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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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1. What is the vertical axis of a graph called? |
The vertical axis of a graph is called the y-axis and extends up and down. |
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2. What is the name of the horizontal axis of a graph? |
The horizontal axis of a graph is the x-axis. The x-axis extends side to side. |
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3. How are scores on the ultrasound board exams related to study time? |
Directly ; Two variables are related when changes in one variable result in changes in the other. Since scores increase as study time increases, these variables are directly related. |
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4. How are caloric intake and weight related? |
The two terms are directly related. As food intake increases, weight increases. Similarly, as food intake decreases, weight decreases. |
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5. How is weight related to sonographer’s time spent exercising? |
Inversely ; Two variable are related when changes in one variable result in changes in the other. When the change follow in the opposite direction (one increases as the other decreases), the variables are inversely related. |
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6. What is the reciprocal of 1,000? |
0.001 ; A pair of reciprocal numbers, when multiplied together, have a value of 1. In this case, 1,000 x 0.001= 1 |
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7. What is the reciprocal of 5? |
1/5 ; A pair of reciprocal numbers, when multiplied together, have a value of 1. In case, 5 x 1/5 = 1 |
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8. What is the reciprocal of 1/10? |
10 ; A pair of reciprocal numbers, when multiplied together, have a value of 1. In this case, 10 x 1/10 = 1. |
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9. A sack contains 6 pounds of flour. The contents of the bag are increased by a factor of 5. How much flour is in the bag? |
30 pounds ; The term “increase by a factor” means to multiply. 6x5 = 30 |
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10. A bouquet has 30 flowers. The size of the bouquet is decreased by a factor of 3. How many flowers remain? |
10 ; The term “decrease by a factor” means to divide. 30/3 = 10. |
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11. Which of the following is not a measure of area? • Square cm • Meters squared • Cubic meters • Feet x feet |
Cubic meters are not used to measure area, they are used to measure volume. An area is measured in units of distance squared. |
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12. A sonographer measures the perimeter of an anatomical structure. Which of the following choices is a reasonable value for the measurement? • 6 cm squared • 5 cc • 15 mm • 18 dB |
15 mm ; “Perimeter” means the length of the outer boundary of a structure. |
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13. What are the units associated with the circumference of a circle? • mm • mm squared • cm cubed • m to the 4th |
mm ; A circumference of a circle is the length of the circle’s outer boundary and is measured in units of length. |
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14. The volume of a cystic structure is estimated from sonographic data. Which of the following is an acceptable measurement of this volume? • 6 • 6 cm • 6 cm squared • 6 cm cubed |
6 cm cubed ; The units of volume are length cubed such as cubic centimeter or foot cubed. Volume may also be expressed as length to third power. |
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15. The speed of red blood cells traveling through a blood vessel is 750 cm/sec. You are asked to measure this speed in miles per hour. What information would be sufficient for you to complete your task? |
How many seconds per hour and the number of miles in a centimeter ; To convert one unit to another requires that relates two terms. |
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16. How much bigger is one billion than one thousand? |
1,000,000 ; A billion is one million times larger than a thousand. |
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Metric System 17. Select the sequence that appears in increasing order. • mega, kilo, hecto, milli, giga • nano, milli, micro, deci, deca, mega • centi, deci, deca, hecto • milli, hecto, centi, deci, nano, giga |
centi, deci, deca, hecto |
centi, deci, deca, hecto |
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18. How many nanoseconds are in 7 seconds? |
7,000,000,000 ; Nano means billionth. There are one billion billionth in one second. Therefore, there are 7 billion billionths in 7 seconds. |
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19. The letters below represent the abbreviations for the prefixes of the metric system. Select the sequence that appears in decreasing order. • m, k, M, g, da • g, m, k, d, u • g, k, di, m, u, n • M, k, da, d, c |
M, k, da, d, c |
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20. March the following prefixes with their meanings.
A. mega 1. hundredths B. hecto 2. thousands C. milli 3. thousandths D. kilo 4. millions E. nano 5. billions F. giga 6. billionths |
• A. mega = 4. millions • B. hecto = 1. hundreds • C. milli = 3. thousandths • D. kilo = 2. thousands • E. nano = 6. billionths • F. giga = billions |
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