MATTER �Matter: anything that has mass and takes up space Mass – the amount of matter in something Volume – the amount of space something occupies �Which of the following is matter? A car? A box? You?
What is a Chemical? �Everything in the world that isn’t energy is a chemical or is made up of chemicals!!! �Our bodies are made up of chemicals �Oxygen �Carbon �Hydrogen �Nitrogen �Many others
What is a Physical Property? �A characteristic of a substance that can be observed
Examples of Physical Properties • Luster: How shiny something is. • Malleability: The ability to be hammered into a thin sheet • Ductility: The ability to be stretched into a wire
Examples of Physical Properties • Melting point: Temperature at which a solid turns to liquid • Boiling point: Temperature at which a liquid turns to gas • Density: The mass of a given volume of a substance
Examples of Physical Properties • Solubility: Ability to dissolve • Hardness: Resistance to being scratched • Viscosity: How easily a liquid flows • State: Is it solid, liquid or gas at room temperature?
Chemical Properties �Chemical property: describes the behaviour of a substance as it becomes a new substance. Examples: • Flammability/combustibility • Ability to rust • Reactivity with vinegar