HEAT

What is heat?

• Heat is a form of energy
• Causes a sensation to our human eyes

What is temperature?

• It is the degree of hotness or coldness
• It is measured by 3 main units
• It is measure by a thermometer

Those three units are Kelvin, Celcius, Farhanhite.

Thermometer

• Measures temperature 
• There are 2 types of thermometer

Those 2 types of thermometer are:

Clinical thermometer:

• Used by doctors
• Has mercury in a tube
• Has kink (Kink helps in not letting the mercury fall down
• It is from 35 degree Celsius to 42 degree Celsius
• A person should have approximately 37 degree Celsius

Labortary thermometer:

• Used by scientists
• Has mercury in tube
• It is from -10 degree Celsius to -110 degree Celsius
• Doesn't have kink (So this is why scientists will hold it upside down to not let the mercury fall)

Now in the advanced digital world,

A new type of clinical thermometer has been invented

That thermometer is name is infrared thermometer

• Measures temperature
• Used by doctors
• Tells value in half second
• No need of contact in touching with the patient