Chapter 10 Lesson 2 and 3Chapter 10 Lesson 2 and 3

Sunshine State StandardsSunshine State Standards

SC. 7. P. 11. 4- Observe and describe that SC. 7. P. 11. 4- Observe and describe that heat flows in predictable ways, moving from heat flows in predictable ways, moving from warmer objects to cooler ones until they warmer objects to cooler ones until they reach the same temperature. reach the same temperature.

SC. 6. S. 6. 2- Select and analyze the SC. 6. S. 6. 2- Select and analyze the measures of central tendency to summarize a measures of central tendency to summarize a data set.data set.

LA. 7. 2. 2. 3- The student will organize LA. 7. 2. 2. 3- The student will organize information to show understanding (e.g. information to show understanding (e.g. representing main ideas through charting).representing main ideas through charting).

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First 6 minutesFirst 6 minutes

What determines the What determines the temperature of an object?temperature of an object?

Temperature: Temperature: Is a measure of how hot or cold something is Is a measure of how hot or cold something is

compared to a reference point. compared to a reference point. Remember: What tool did we learn to measure Remember: What tool did we learn to measure

temperature with from Ch. 1 L. 3?temperature with from Ch. 1 L. 3? ThermometerThermometer

What were the 3 scales we discussed that are What were the 3 scales we discussed that are used to measure temperature?used to measure temperature? Kelvin, Celsius, and FahrenheitKelvin, Celsius, and Fahrenheit

Which of these scales was the official SI unit?Which of these scales was the official SI unit? Kelvin!Kelvin!

Temperature scalesTemperature scales Fahrenheit scale-Fahrenheit scale-

used to measure temperature in the US. used to measure temperature in the US. Measured by degrees F.Measured by degrees F.

Celsius scale- Celsius scale-

Used to measure temperature in most Used to measure temperature in most countries. Measured by degrees C.countries. Measured by degrees C.

Kelvin scale-Kelvin scale-

Used in science. Measured by K.Used in science. Measured by K. 0 Kelvin is ABSOLUTE ZERO 0 Kelvin is ABSOLUTE ZERO

the lowest temperature possiblethe lowest temperature possible

Boiling point of water

Freezing point of water

Absolute zero

Temperature is the Temperature is the averageaverage kinetic energy of the particles kinetic energy of the particles

in an objectin an object

13

109

15

13

Find the average or mean

of the kinetic energy of the

particles in the pot

13+15+9+13+10= 55

55/ 5=Mean =11

Review:What is the mode?13What is the range?15-9= 6What is the medium?9 10 13 13 15 Medium =13

Thermal energy versus Thermal energy versus temperaturetemperature

Although thermal energy and temperature are Although thermal energy and temperature are closely related, they are not the same thing.closely related, they are not the same thing.

Two objects that have the same temperature Two objects that have the same temperature can have different thermal energiescan have different thermal energies

Thermal energy is the total energy of all the Thermal energy is the total energy of all the particles of an object particles of an object

Temperature is the average kinetic energyTemperature is the average kinetic energy but but thermal energy depends on the objects thermal energy depends on the objects temperature, number of particles, AND the temperature, number of particles, AND the arrangement of the particles.arrangement of the particles.

Both the lake and the water

in the glass have the

same temperatur

e

Which has more thermal energy the lake or the glass and why??

The Lake because there are more particles in the lake then in the glass of water, even though their average kinetic energy is the same temperature.

Thermal energy versus temperature

HEATHEAT Heat is the Heat is the

transfer of transfer of energy from energy from a warmer a warmer object to a object to a cooler object.cooler object.

Heat will Heat will continue to continue to transfer until transfer until both objects both objects are the same are the same temperature.temperature.

1. The warm air from the room is transferring to the cooler water.

2. The water is transferring thermal energy to the cooler ice.

3. These transfers of energy from warm to cool will continue until the ice is melted and the water is the same temperature as the room.

Heat transferHeat transfer

What are the three ways heat is transferred

• Convection• The heat transfer that occurs only in

fluids such as air and water.• Convection currents

• Conduction• Transfers heat from one particle of

matter to another within or between two objects.

• Touch• Radiation• The transfer of energy by

electromagnetic waves.• Does not need matter to transfer, can

transfer through space.

GOT IT??GOT IT?? Lets see if you can follow along!Lets see if you can follow along!

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