Lesson 52: Hot Enough Thermometers

What is the purpose of the lab described in Lesson 52: Hot Enough Thermometers?

• To determine the freezing point of various liquids

• To examine how the volumes of a liquid and a gas change in response to temperature

• To compare different types of thermometers

• To measure the exact temperature of boiling water

Answer explanation

The purpose of the lab described in Lesson 52 is to examine how the volumes of a liquid and a gas change in response to temperature, making this the correct choice.

Which of the following materials is NOT listed as required for Part I: Liquid Thermometer?

• Small glass vial

• Ethylene glycol (antifreeze)

• Barometer

• Ice

Answer explanation

The correct choice is 'Barometer' because it is NOT listed as required for Part I: Liquid Thermometer.

What should be used to mark the level the liquid reaches in the straw in the ethylene glycol thermometer for the five conditions?

• A barometer

• A thermometer

• A fine-point permanent marker

• A pencil

Answer explanation

A fine-point permanent marker should be used to mark the level the liquid reaches in the straw in the ethylene glycol thermometer for the five conditions because it provides a clear and permanent marking.

How many milliliters of ethylene glycol (antifreeze) are needed for the experiment?

• 10 mL

• 15 mL

• 25 mL

• 30 mL

Answer explanation

The correct amount of ethylene glycol needed for the experiment is 25 mL, as stated in the answer choices.

What is the procedure for creating a scale for the thermometer in the lab?

• Assign numbers for the places marked on the straw for room temperature and ice water only

• Assign numbers for the places marked on the straw for boiling water and ice water only

• Assign numbers for the places marked on the straw for boiling water and room temperature only

• Assign numbers for the places marked on the straw for all five conditions

Answer explanation

The procedure for creating a scale for the thermometer in the lab is to assign numbers for the places marked on the straw for boiling water and ice water only.

What is the formula for converting degrees Celsius to degrees Fahrenheit?

• F = ^oC + 32

Answer explanation

The correct formula for converting degrees Celsius to degrees Fahrenheit is F = (9/5) °C + 32.

According to the given scale, what is the equivalent of 50 °C in degrees Fahrenheit?

• 122 °F

• 104 °F

• 86 °F

• 140 °F

Answer explanation

To convert from Celsius to Fahrenheit, use the formula (°C × 9/5) + 32. So, (50 × 9/5) + 32 = 122 °F. Therefore, the equivalent of 50 °C is 122 °F.

Which temperature is higher, 30 °C or 30 °F?

• 30 °C is higher

• 30 °F is higher

• Both are the same

• Cannot be determined from the given information

Answer explanation

30 °C is higher because 30 °C is equivalent to 86 °F, which is higher than 30 °F.

What is the temperature of the room in degrees Celsius if the Fahrenheit temperature is 68 °F?

• 20 °C

• 30 °C

• 40 °C

• 50 °C

Answer explanation

To convert Fahrenheit to Celsius, subtract 32 and then multiply by 5/9. So, (68-32) * 5/9 = 20 °C. Therefore, the temperature of the room in degrees Celsius is 20 °C.

What is the body temperature in degrees Celsius if the Fahrenheit temperature is 98.6 °F?

• 37 °C

• 40 °C

• 35 °C

• 42 °C

Answer explanation

To convert Fahrenheit to Celsius, subtract 32 and then multiply by 5/9. So, (98.6 - 32) * 5/9 = 37 °C. Therefore, the correct answer is 37 °C.