Lesson Notes By Weeks and Term - Senior Secondary School 1

SUBJECT: PHYSICS

CLASS:  SS 1

DATE:

TERM: 2nd TERM

REFERENCE BOOK

• New School Physics By M.W Anyakoha
• Senior Secondary School Physics By P.N Okeke

 
WEEK ONE

TOPIC: Heat Energy, Concept of Heat and Temperature and Effects of Heat

CONTENT

• Concept of Heat
• Temperature
• Effect of Heat on bodies.

Concept of Heat

Heat is a concept of physics that deals with the study of relative motion of fluid (liquid and gas) from one body to another. It is a form of energy that can be transferred from one body due to temperature differences.

Temperature

Temperature is the degree of hotness and coldness of a body or an object. It is a scalar quantity, measured in Kelvin. Heat and Temperature are similar but not the same

Differences between Heat and Temperature 

1. Heat is a measure of the total internal energy of a body while temperature is the degree of hotness or coldness of the body.
2. Heat takes place due to temperature difference while temperature occurs due to slight change of substance.
3. Heat is measured in joules while temperature is measured in Kelvin / Celsius.

Effect of Heat

 When heat is applied to a body the following effect may occur

1. Expansion: when heat is applied, volumes increases while density decreases.
2. Change in temperature: When heat is added on a body, the temperature increases
3. Change of state: melting, freezing, condensation, evaporation etc.
4. Thermion emission: Addition of heat on metal may result in the emission of electron from the surface of the metal
5. Photo electric emission: The emission of electron when sufficient light of high frequency is illuminated on a metal surface e.g. zinc plate.

EVALUATION                                                                                                                         

1. Differentiate between heat and temperature.

2. Mention five effect of heat.

Reading Assignment

www.google.com (click on google search, type “concept of heat”, click on search) and New School Physics pg36.

WEEKEND ASSIGNMENT                                                                                                   

1. Which of the following is not an effect of heat? A. expansion B. contraction 

1. change of state. D.  increase in weight

1. Temperature can be measured in the following units except A. degree celsius  

1. kelvin C. degree Fahrenheit D. centigrade-meter

1. When heat is extracted from water it changes from liquid to gas. What is this process called....................
2. The process of by which a gas is converted to a solid is called .................
3. Fahrenheit is a unit of ...............................

THEORY

1. Differentiate between heat and temperature.                                                            
2. Mention five effect of heat.