*Question*
Answer the following question given this paragraph: When using measuring devices, we often use a technique called calibration to increase the accuracy of our measurements. Calibration is a method of setting or correcting a measuring device by matching it to known measurement standards. To better understand calibration, we will look at the example of calibrating a thermometer. All thermometers are slightly different in their temperature readings. One way to calibrate a thermometer is by using the freezing point and boiling point of water ( Figure below ). If we know that water freezes at 0C and boils at 100C, we can calibrate our thermometer by measuring the temperature of ice water and of boiling water. We place the thermometer in ice water and wait for the thermometer liquid to reach a stable height, then place a mark at this height which represents 0C. Then we place the thermometer in boiling water, and after waiting for the thermometer liquid to reach a stable height, we place a mark at this height which represents 100C. We can then place 100 equally spaced divisions between our 0 and 100C marks to each represent 1C. Our thermometer has now been calibrated using the known values for the freezing point and boiling point of water, and can be used to measure temperatures of objects between 0 and 100C. Q: What is the method of setting or correcting a measuring device by matching it to known measurement standards called? Choices: - parallax - distortion - precision - calibration A:
**Answer**
calibration

*Question*
Answer the following question given this paragraph: Sulfuric acid is produced in extremely large quantities in the United States (about 40 million tons/year). This material is manufactured by oxidizing sulfur to form sulfur trioxide. The SO 3 is then dissolved in water to form the sulfuric acid. Most of the sulfuric acid produced is used in fertilizers. This acid is also found in lead-acid car batteries. Q: What is sulfur trioxide dissolved in to form sulfuric acid? Choices: - silver - mercury - lead - water A:
**Answer**
water

*Question*
Answer the following question given this paragraph: Humans and apes have five fingers they can use to grasp objects. Do you think these are analogous or homologous structures? Explain. Q: How many fingers do apes have on each hand? Choices: - seven - six - four - five A:
**Answer**
five

*Question*
Answer the following question given this paragraph: Electronic components are the parts used in electronic devices. They are made of p-type and n-type semiconductors. Examples of electronic components include diodes, transistors, and integrated circuits (microchips). Q: What are diodes, transistors, and integrated circuits examples of? Choices: - computer parts - radio parts - machine parts - electronic components A:
**Answer**
electronic components