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# Heat Transfer Lab PowerPoint PPT Presentation

Heat Transfer Lab. 8 th Grade Science Butler Middle School Lowell, MA. R. Rogers Mar 8, 2011. Thermal Energy Total Energy of all the moving molecules in an object Heat Thermal Energy moving from a warm object to a cooler object Heat transfers in 3 ways Conduction Convection Radiation.

Heat Transfer Lab

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## Heat Transfer Lab

8th Grade ScienceButler Middle SchoolLowell, MA

R. RogersMar 8, 2011

• Thermal Energy

• Total Energy of all the moving molecules in an object

• Heat

• Thermal Energy moving from a warm object to a cooler object

• Heat transfers in 3 ways

• Conduction

• Convection

Conduction, Convection, and Radiationoften occur together

• Energy

• Ability to do work or cause change

• Exists in many different forms

• Kinetic Energy

• Energy from motion or movement

• Temperature

• A measure of the average Kinetic Energy of all the molecules in an object

### Thermometer

• Measures Temperature

• Bulb Thermometer

• Based on expansion & contraction of a liquid in a glass tube

### Temperature Scales

K C F

Water Boils

Water Boils

K & C degrees are same size

F deg are smaller than C deg

Ideal Room Temp, 68° F = 20° C

Water Freezes

Absolute Zero = Coldest Temp

Experiment

Cold Water in Plastic Pail

Hot Water in Metal Can

Place a thermometer in

pail and in can. Wait for red

line to stop moving.

Record temperature of each,

call this:

“temperature at time 0”

Experiment (continued)

Place metal can with hot water in plastic pail with cold water

Gently stir water in each container

Record temperatures of water in each container every 1 minute

Plot hot water temp and cold water temp vs time

90

80

Hot Water

70

60

Temperature

(Deg C)

50

40

30

Cold Water

20

10

0

1

2

3

4

5

6

Time (min)