Types of energy 2

Theme: YOU AND ENERGY

Basic science    J.S.S.2   Second Term

WEEK 9

Types of energy 2

Performance Objectives

The student should be able to:

1. Explain the molecular structures of solids, liquids and gases using kinetic energy
2. Explain boiling and evaporation using kinetic theory

Content

Solids

A solid’s particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely; they can only vibrate. As a result, a solid has a stable, definite shape and a definite volume. Solids can only change shape under force, as when broken or cut.

In crystalline solids, particles are packed in a regularly ordered, repeating pattern. There are many different crystal structures, and the same substance can have more…