Lower Secondary Science

Key Definition Matter: any substance (thing) that has mass and takes up space. Atoms: smallest particles of an element that have the chemical properties of that element. Element: it is a pure substance that cannot be broken down into two or more simpler substances by chemical processes. Molecule: a molecule is a group of two … Read more

Key Ideas Matter exists in 3 states: solid, liquid and gas. Whenever the matter changes its state, DURING the process of changing, the temperature remains constant (e.g melting point and boiling point) Word Choices When describing the movement of the molecules, you need to remember the appropriate term for different state. Use the terms ‘vibrate‘ … Read more