Examine the image of the ruler, which measures length in inches. 1/4 1/4 1/4 1/2 1/4 1/2 1/4 1/2 1/4 1/4 2' 3 inch 1/2 1/4 1/4 1/2 1/4 4 5 Complete the sentences. Type your answers in the boxes. An answer may be a fraction. If it is, use a decimal, like this: 4.2 The smallest increment on the ruler is inch/inches. The uncertainty is inch/inches. Question 2 This image shows a voltmeter, which measures electric potential in volts (V). V 200 100 0-1.5500V 300 400 500 Type your answers in the boxes to complete the sentences. The smallest increment on the voltmeter is The uncertainty is V. V. Question 3 Inga and Aileen are measuring the temperature of frozen hydrogen. Inga is using a thermometer that has increments of 0.25F, and she gets a measurement of 3.25F. Aileen is using a thermometer that has increments of 0.125F, and she gets a measurement of 3.375F. Which thermometer has less uncertainty? Neither, because Inga and Aileen had different measurements. Aileen's thermometer, because it has smaller increments. Inga's thermometer, because 3.25F is less than 3.375F. Neither, because the uncertainty in both thermometers is the same. Question 4 Mason is weighing his dog on a scale that has increments of 0.1 kilograms (kg). He measures his dog's weight as 35.7 kg. How should Mason express his dog's weight to include the uncertainty? 35.7 0.5 kg 35.7 + 0.1 kg 35.7 -0.1 kg 35.7 0.05 kg Question 5 Answer both of the questions. 1. Think of two things that you can measure. Give one that requires high precision, or a low level of uncertainty. Give another that can have lower precision, or a higher level of uncertainty. 2. Explain why you made your choices. Why does one measurement need to be more precise than the other?