Heat and Temperature

Why did Anders Celsius choose to start his temperature scale by assigning zero degrees to the temperature at which ice melts at sea level?

• He randomly picked zero degrees.

• To create a starting point for measuring temperature.

• To match it with the Fahrenheit scale.

• It indicated the temperature at which water boils at sea level.

What are the Celsius standard based on?

• Fahrenheit scale

• properties of water

• properties of air

• properties of salt water

Fill in the phrase: The higher above sea level, _____________

• the higher the boiling point

• the lower the boiling point

• The less likely water will boil

• The hot chocolate is colder

Why did Anders Celsius specify that measurements of freezing and boiling points must be done at sea level and with very pure water?

• To make it easier for scientists to conduct experiments.

• Because impurities in water can alter the boiling and freezing points.

• To match it with the Fahrenheit scale.

• Because sea level has the most extreme temperatures.

Why did scientists create a temperature scale starting at Absolute Zero, and what is this scale named after?

• Because Absolute Zero is the coldest possible temperature. The scale is named after Lord Kelvin.

• Because Absolute Zero is the hottest temperature. The scale is named after Sir William Thompson.

• Because Absolute Zero is an arbitrary point. The scale is named after Lord Celsius.

• Because Absolute Zero is the midpoint temperature. The scale is named after Sir William Kelvin.

What is the primary function of a sensor in various devices and instruments?

• To provide mechanical support.

• To generate electrical power.

• To receive and transmit signals.

• To store data.

In the context of devices like thermometers, what does the term "signal" refer to?

• The physical structure of the device.

• The unit of measurement used by the thermometer.

• The material affected by changes in the environment.

• The information about temperature, often in the form of electrical current.

In the functioning of a thermometer, what role does the "responder" play?

• It uses the signal to provide a readable output, such as a pointer or light.

  
  

• It produces the temperature information.

• It determines the material affected by environmental changes.

• It generates signals.

How do wires from two different metals, when twisted together and heated, contribute to temperature measurement?

• They produce heat directly.

• They generate a small electric current dependent on the temperature.

• They cool down rapidly.

• They cause the boiling of liquid in lab thermometers.

How does a device made up of two different metals joined together operate to control devices or appliances?

• By generating a magnetic field.

• By emitting light when heated.

• By producing heat directly.

• By expanding and contracting in response to temperature changes.