Basic science jss2
Wk 9(10 th Nov. 2023).
2ND TERM WEEK 1(8th-12th January 2024.
4Lesson on Meaning and concept of work , Energy and power
For work to be done , a force must be applied and this force must produce a displacement in any direction except perpendicular to the direction of the force . For eg. A man pushing a wheel barrow exerts force in the same direction as the distance of the wheel.
2ND TERM WEEK 2(15th Jan -19th Jan. 2024.)
5LESSON ON POTENTIAL ENERGY AND KINETIC ENERGY
Mechanical energy is the energy used in moving something ( a body ) from one place to another.Mechanical energy is composed of potential energy and kinetic energy. Potential energy means energy by virtue of position. A coconut fruit on a coconut tree has a great potential energy by virtue of its location high above the ground.kinetic energy is the energy by virtue of the movement of a body.If the coconut fruit falls from its tree,its potential energy is converted to kinetic energy.
2ND TERM WEEK 3(22NDJAN -26TH JAN)
2ND TERM WEEK 4(29TH JAN. -2ND FEB 2024.)
7LESSON ON KINETIC THEORY
The Kinetic theory of matter assumes that matter is made up of tiny particles such as atoms,molecules and ions that are continually moving and therefore possess kinectic energy.
A British Scientist,Dalton,about 1806AD,expanded the idea of atoms.He made various statement about the nature of atoms.His ideas about atoms are stated below:
1.Matter is made up of minute indivisible particles called atoms.
2.Atoms cannot be created or destroyed.
3.All the atoms of an element are alike and different from the atoms of all other elements.
2ND TERM WEEK 5 (5TH FEB -9TH FEB 2024 )
8LESSON ON EXPLANATION OF BOILING AND EVAPORATION USING THE KINETIC THEORY
As heat energy is applied to the liquid state of matter ,the temperature and therefore the speed of the molecules increase.Continous application of heat raises the temperature to boiling point.Evaporation which occurs at any temperature is the escape of molecules of a liquid from its surface.