- Introduction
- Rest time! Have fun
- Physics
- Chemistry
- BIOLOGY
- Reaching the age of Adolescence
- CROP PRODUCTION AND MANAGMENT
- Cells : The basic structural unit of life
- Nutrition in human beigns
- RESPIRATION IN HUMAN BEIGNS
- TRANSPORTATION IN HUMAN BEIGNS
- excretory system in human beigns
- NERVOUS SYSTEM
- PHOTOSYNTHESIS
- Respiration in plants
- REPRODUCTION IN PLANTS
- MOVEMENTS IN PLANTS
- Forest our lifeline
- WASTE WATER STORY
- WEATHER,CLIMATE AND ITS ADAPTATION .
- Reaching the age of Adolescence
- Model tests
- Animation time
Physical and Chemical changes
There are many types of changes occuring around us but THERE ARE TWO MAIN TYPES OF CHANGES THEY ARE
1. PHYSICAL CHANGES
2.CHEMICAL CHANGES
1 .PHYSICAL CHANGES
The type of change in which no new substance is formed is known as PHYSICAL CHANGES .
Mostly it is REVERSIBLE .
Less HEAT energy is evolved .
Only the STATES of the object changes .
EXAMPLES OF PHYSICAL CHANGES
1. Evaporation
2. Sublimation
3. Cloud formation
4. cutting of wood
5. Tearing of paper
2. CHEMICAL CHANGES
The type of change in which a new substance is formed is known as CHEMICAL CHANGES .
Mostly it is irrevisible.
More HEAT is envolved .
It happens fast .
EXAMPLES OF CHEMICAL CHANGES
1. Burning of fuels
2. Burinf of wood
3. Burning of Magnesium wire
4. Burning of paper
5. Burning of plastic
1. PHYSICAL CHANGES
2.CHEMICAL CHANGES
1 .PHYSICAL CHANGES
The type of change in which no new substance is formed is known as PHYSICAL CHANGES .
Mostly it is REVERSIBLE .
Less HEAT energy is evolved .
Only the STATES of the object changes .
EXAMPLES OF PHYSICAL CHANGES
1. Evaporation
2. Sublimation
3. Cloud formation
4. cutting of wood
5. Tearing of paper
2. CHEMICAL CHANGES
The type of change in which a new substance is formed is known as CHEMICAL CHANGES .
Mostly it is irrevisible.
More HEAT is envolved .
It happens fast .
EXAMPLES OF CHEMICAL CHANGES
1. Burning of fuels
2. Burinf of wood
3. Burning of Magnesium wire
4. Burning of paper
5. Burning of plastic