Lesson #22

Lesson #22
E.Q:How is temperature measured?

• How does a thermometer work?

​BELLWORK: Watch the video and fill in the blank

Multiple Choice

The temperature of a substance increases as___.

• the substance expands
• the average kinetic energy of its particles increases
• the substance's volume increases
• the substance's mass increases

Multiple Choice

A measure of the average kinetic energy of the individual particles in an object is called:

• thermal energy

• conduction

• convection

• temperature

Thermometers

Many thermometers measure
temperature with a liquid that expands
when it gets warmer and contracts
when it gets cooler.

The red liquid rises or falls in the glass
tube as the temperature changes.
Temperature is read off the scale at
the height of the liquid in the tube.

Temperature Scales

Although some scientists use the Celsius scale.

The SI scale for measuring temperature is the Kelvin scale. I

The U.S. uses the Fahrenheit scale.

Multiple Choice

Which temperature scale is based on the freezing and boiling point of water?

• Kelvin

• Celsius

• Fahrenheit

Temperature scale conversion

To convert a temperature from Celsius to Kelvin, just add 273
to the Celsius temperature.

For example, 10 °C equals 283 Kelvin.

C to F

Converting between Celsius and Fahrenheit is more
complicated.

Celsius → Fahrenheit: (°C × 1.8) + 32 = °F

Fahrenheit → Celsius: (°F - 32) ÷ 1.8 = °C

Multiple Choice

80 C = F

• 176

• 44.4

• 12.4

• 144

Multiple Choice

76 F = C

• 44

• 24.4

• 12

• 349

Absolute Zero

The lowest temperature that is theoretically possible, at which
the motion of particles that constitutes heat would be
minimal.

It is zero on the Kelvin scale, equivalent to –273.15°C or
–459.67°F.

Multiple Choice

Absolute Zero

• All molecular motion has stopped

• An object is frozen

Multiple Choice

Water boils at 212 degrees on which scale?

• Farenheit
• Celsius
• Kelvin

Multiple Choice

the temperature scale on which 0 is the temp at which no more energy can be removed

• absolute zero

• Fahrenheit scale

• Kelvin scale

• Celsius scale

Multiple Choice

What tool do we use to measure temperature?

• Thermometer

• Ruler

• Balance

• Magnifying Glass

Multiple Choice

The movement of thermal energy from a warmer object to a cooler object is called:

• heat

• temperature

• motion

• momentum

Review Questions

Multiple Choice

The temperature of a substance increases as___.

• the substance expands
• the average kinetic energy of its particles increases
• the substance's volume increases
• the substance's mass increases

Multiple Choice

Which thermometer shows a very hot day in degrees Fahrenheit?

• Blue
• Green
• Red
• Red and Green

Multiple Choice

A measure of the average kinetic energy of the individual particles in an object is called:

• thermal energy
• conduction
• convection
• temperature

Multiple Choice

Which thermometers temperature is about  25° Celcius?

• Blue
• Green
• Blue
• Blue and Green

Multiple Choice

The movement of thermal energy from a warmer object to a cooler object is called:

• heat

• temperature

• motion

• momentum

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