How would I record the temperature here? What about here?

Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another.

Sketch and Label Fixed points Bulb Scale Narrow tube Glass Stem Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. Sketch and Label Fixed points Ice Point Steam Point Bulb Scale Narrow tube Glass Stem Expansive Liquid

How to Calibrate a Thermometer Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. How to Calibrate a Thermometer Calibration is the act of putting a scale on an instrument such that it gives accurate readings. Create the object itself! You will need a liquid in a standard dimension container and something to write with! Place the thermometer into pure melting ice, it will reach 0 degrees C. Mark the point that the coloured liquid has reached with a pen, this first fixed end is called the ice point. Next place the thermometer directly above boiling water and once the level settles mark the second fixed end also known as the steam point.

Explain what is meant by the term calibration Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. Questions to answer Describe using bullet points the basics of how to calibrate a bulb-thermometer (this answer should include reference to the fixed ends). Explain what is meant by the term calibration Suggest a reason why the ice used must be pure Suggest a reason why the water must be boiled at room pressure rather than in a container The liquid inside the thermometer must have very particular properties, suggest two of these.

Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. Specifics The liquid which will fill the thermometer has a number of requirements. Firstly it must expand with increased temperature This expansion must be linear (or close to) Melting point must be sufficiently low that it can record temperatures below O. Boiling point must be sufficiently high that it can record temperatures above 100. Must not be colourless

Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. Limitations Thermometer is only capable of making measurements between its melting and boiling points (i.e. whilst in a liquid phase) Assumption that it expands linearly with temperature – this may not be the case. Only two fixed points have been used – this is fine for everyday measurements but if higher or lower temperatures are needed more fixed points are required.

Features of Thermometers Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. Features of Thermometers Sensitivity How far the liquid expands when there is a set change in temperature and therefore how precise readings can be taken. This can be effected both by the type of liquid and narrowness of tube. Range As it says on tin. Highest and lowest. Responsiveness How quickly you can gain an accurate reading – bulb is generally slow and slower still if thick glass.

Learning Objectives By the end of this lesson you should be able to… Apply and explain the use of the different temperature scales. Describe a number of different thermometer types including bulb, thermocouple and bi-metallic. Explain the advantages and limitations of one particular type of thermometer compared with another. Types of Thermometers Using any resources online complete the summary table (expand the boxes as required) to explain the key features and functions of; Alcohol in glass thermometer Thermistor Thermocouple Bi-metallic thermometers