Temperature is one of the fundamental (base) quantities.

During the day we feel hot, but cool at night.

Fire is hot, but ice is cold.

A hot object is said to have high temperature, but a cold object has low

temperature.

Thus temperature shows the degree of hotness and coldness

of an object.

Your palm can feel the hotness or coldness of a thing. But can you use

it to measure temperature?

. The common measuring tool for

temperature is a thermometer.

A thermometer consists of a long glass tube with a narrow column, called capillary pipe, containing liquid, alcohol or

mercury. But, the upper part is vacuum.

The kinds of temperature scales : Fahrenheit, Celsius , Reamur and Kelvin.

There are four commonly used temperature scales in existence they are:

Celsius: The celcius scale is defined such that the freezing point of water is 0°C and the boiling point of water is at 100°C. Absolute zero occurs at –273.15°C.

Kelvin: The kelvin scale is the celcius scale offset such that absolute zero occurs at 0 K. This means water freezes at 273 K and boils at 373K.

Fahrenheit: The fahrenheit scale is defined such that the freezing point of water is 32°F and the boiling point of water is at 212°F. Absolute zero occurs at –460°F.

Reamur: The reamur scale is defined such that the freezing point of water is 0°R and the boiling point of water is at 80°R. Absolute zero occurs at –218,4 °R.

Scale Absolute Zero

Freezing point

Boiling Point

Celcius -273 oC 0 oC 100oC

Reamur -218,4 oR 0 oR 80 oR

Fahrenheit

-460 oF 32 oF 212 oF

Kelvin 0 K 273 K 373 K

RxtCt oo )54(

CxtRt oo )45(

1. Convert the following temperatures into Reamur!

a. 75 oC b. 28 oC c. 86 oC d. 46 oC

2. Convert the following temperatures into Celcius!

a. 60 oR b. 28 oR c. 36 oR d. 48 oR

FxtCt oo ))32)59((

CtFt oo )95)32((

1. Convert the following temperatures into Fahrenheit!

a. 75 oC b. 28 oC c. 86 oC d. 46 oC

2. Convert the following temperatures into Celcius!

a. 41 oF b. 82 oF c. 57 oF d. 62 oF

FxtRt oo ))32)49((

RtFt oo )94)32((

1. Convert the following temperatures into Fahrenheit!

a. 60 oR b. 40 oR c. 32 oR d. 48 oR

2. Convert the following temperatures into Celcius!

a. 41 oF b. 95 oF c. 122 oF d. 68 oF

KtCt o )273(

CttK o)273(

1. Convert the following temperatures into Kelvin!

a. 75 oF b. 28 oC c. 86 oC d. 46 oC

2. What does 40 oC equal to if measured by using these following thermometer ?

a. Reamur b. Fahrenheit c. Kelvin

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