OJB Eazylearning

Basic science

Class: Jss 2

Presentation

What is thermal Energy?

If you have a hot drink, how do you make it cold? Well, one way would be to add ice cubes, but how do ice cubes make the liquid in your drink cold? The answer becomes clear when you understand thermal energy, which is the energy that comes from heat. In fact, the word 'thermal' refers to heat, so you can think of thermal energy as heat energy.

*How Does Thermal Energy Work?*
Thermal energy is produced by the movement of molecules in an object. You see, all objects are made up of tiny particles called molecules. In cold things, like ice cubes, the molecules move very slowly. In hot things, like a hot drink, the molecules move very fast. The faster the molecules are moving inside an object, the hotter the object will be. So, when you put ice cubes into your hot drink, they absorb the heat energy from the drink, which melts the ice and cools the drink.

*QUESTION*
1) Write short note on the following

a) Radiation
b) Conduction
c) Convection

*Presentation*

*What Is Menstruation?*
Menstruation, or a menstrual period, is the periodic shedding of the lining of a woman's uterus. It is one of the phases of the menstrual cycle. The uterine lining breaks down into a bloody substance. It then passes down through the cervix and exits through the va**na. The process usually lasts from three to five days. The amount of menstrual blood can vary from period to period and from woman to woman.

*Why Is it Necessary?*
The uterus is the womb that will cradle a fetus(baby) as it grows. A fertilized egg will implant here, and it is important for the uterus to have a nice fresh supply of nutrients and goodies to help the egg during early development. But, the uterine lining has an expiration date. If the woman does not become pregnant, then the lining is cleared out during menstruation so that a fresh one can be built.

QUESTION

2) Explain