Temperature, Heat, Temperature, Heat, and Thermal and Thermal EnergyEnergy

How do particles move How do particles move as they get warmer? as they get warmer? Cooler?Cooler?

Estimate:Estimate:

The temperature of the The temperature of the room.room.The temperature The temperature outside.outside.

What do we learn when What do we learn when we read a thermometer?we read a thermometer?

This question will be answered throughout This question will be answered throughout our study of temperature, heat, and our study of temperature, heat, and thermal energy.thermal energy.

ActivityActivity

3 bulb thermometers3 bulb thermometers 1 temperature sensing sheet (yellow dot)1 temperature sensing sheet (yellow dot) 1 temperature sensing sheet (red dot)1 temperature sensing sheet (red dot) 3 foam cups3 foam cups Warm waterWarm water Cool waterCool water Shallow panShallow pan Towel or paper towelsTowel or paper towels

What part of the What part of the thermometer actually thermometer actually senses the temperature? senses the temperature?

The bulb at the end is the sensitive partThe bulb at the end is the sensitive part

It contains alcohol, colored red; this It contains alcohol, colored red; this expands as the temperature rises. The expands as the temperature rises. The alcohol is forced into a very then tube alcohol is forced into a very then tube that contains only a very small amount of that contains only a very small amount of alcohol compared with the bulb. alcohol compared with the bulb.

Is your hand warmer than Is your hand warmer than the air in the room or the air in the room or cooler?cooler?

The thermometer in air reads about 22 C. The thermometer in air reads about 22 C. Wrapping a hand around it raises it to Wrapping a hand around it raises it to about 30 C. Therefore, people are about 30 C. Therefore, people are warmer than a typical room. warmer than a typical room.

Measure the temperature of Measure the temperature of various things and record various things and record them in the chartthem in the chart

ItemsItems Temperature (C)Temperature (C)

Air in the roomAir in the room

Cold water Cold water

Warm waterWarm water

Your handYour hand

A temperature sensing sheet is A temperature sensing sheet is another kind of thermometer. another kind of thermometer. Its color is different at Its color is different at different temperatures. different temperatures. Describe the effect you have Describe the effect you have on each of the sensing sheets on each of the sensing sheets when you touched them.when you touched them.

Depending on the where you touch the paper Depending on the where you touch the paper (front or back), the color changes…..darker (front or back), the color changes…..darker blue or violet. When you stop touching it, that blue or violet. When you stop touching it, that area changes color back to the same as the area changes color back to the same as the rest of the sheet. rest of the sheet.

Study one temperature sensing Study one temperature sensing sheet as it warms (when your hand sheet as it warms (when your hand touches it) and cools (after you touches it) and cools (after you release it). Is “brown” warmer release it). Is “brown” warmer than “green” or cooler?than “green” or cooler?

Brown is cooler than green. Brown is cooler than green.

Using the same temperature Using the same temperature sensing sheet, name 4 colors that sensing sheet, name 4 colors that it can be. Put those colors in order it can be. Put those colors in order

from warmest to coolest.from warmest to coolest. The full range of colors from warmest to The full range of colors from warmest to

coolest are:coolest are: Violet, dark blue, blue, green, tan, brown, Violet, dark blue, blue, green, tan, brown,

and blackand black

How are the two sensing How are the two sensing sheets the same and how sheets the same and how are they different?are they different? Each sheet is brown and tan when it is Each sheet is brown and tan when it is

“cool” and blue when it is “warm”. Each “cool” and blue when it is “warm”. Each sensor sheet has a different range of sensor sheet has a different range of sensitivity. According to the “red dot” sensitivity. According to the “red dot” sheet, 25 C is “warm”; according to the sheet, 25 C is “warm”; according to the “yellow dot” sheet, 25 C is “Cool”“yellow dot” sheet, 25 C is “Cool”