WEEK/TERM: THIRD TERM /WEEK 4
CLASS: Grade 3
DATE: 26th June, 2020
SUBJECT: Basic Science and Technology
TOPIC: Heat and Temperature
Reference: Stan Basic Science and Technology for primary 4.
Heat and temperature are two related words. Heat is a form of energy. It flows from one place to another and it is useful in our day to day activities. Heat causes a change in temperature.
Notes for the pupils
Meaning of Heat
Heat is a form of energy due to difference in temperature. It can be transferred from one place to another.
Listed below are the methods of Heat Transfer
Radiation: Radiation is heat from the sun that travels without an object.
Conduction: Conduction is heat that travels through a body as the body moves from one place to another.
Temperature is the degree of heat or cold of a substance. It is measured in degrees centigrade or Celsius (0C), degree Fahrenheit (0F) and kelvin.
Effects of Heat on Substances
- Some substances melts when heat is applied to them e.g. plastic, ice etc.
- Liquid evaporates on heating.
- Heat gives us warmth at cold periods.
- Heat causes metals to expand.
- Liquid and gases expands on heating.
DIFFERENCES BETWEEN HEAT AND TEMPERATURE
|1||Heat is a form of energy
|Temperature is the quality or property of
|2||Heat is obtained from solar energy, chemical energy and mechanical energy.||Temperature is obtained when a substance is heated or cooled.|
|3||Heat causes change in degree or temperature||Temperature is the heat generated.|
|4||Metric unit of measurement of heat is calories in joules in S.I unit.||Temperature is measured in degree Celsius or Kelvin or
|5||Heat is the change that flows||Temperature determines the direction of the heat flow.|
- Define the following:
- Explain three methods of heat transfer.
- The metric unit for measurement of heat is _________
- Temperature is measured in _______________