Grade 6 Science: Matter and Particle Theory
Free Grade 6 Science unit on Matter and Particle Theory: 10 lessons in order, starting with Matter. Includes practice questions and answer keys.
10 lessons in this unit
Matter
Learn that matter is anything that has mass and takes up space, how we measure mass and volume, what density means in a simple way, and that gases are matter too.
Lesson 2The particle model
Learn that all matter is made of tiny particles that are always moving, that the particle model explains the properties of solids, liquids and gases, and recognise that models are useful but have limits.
Lesson 3Solids
Learn how the particle model explains the properties of solids, fixed shape and volume, particles close together in a regular pattern vibrating in place, cannot be compressed, and the difference between crystalline solids and powders.
Lesson 4Liquids
Learn how the particle model explains the properties of liquids, no fixed shape but fixed volume, particles close but able to slide past each other, hard to compress, and surface tension and viscosity.
Lesson 5Gases
Learn how the particle model explains the properties of gases, no fixed shape or volume, particles far apart and moving fast, easy to compress, and how gas pressure comes from particles hitting surfaces.
Lesson 6Particle movement
Learn that particles in all states are in constant motion, that temperature measures how fast they move on average, that heating increases particle speed and energy, and how Brownian motion gives evidence for moving particles.
Lesson 7Changes of state
Learn the changes of state, melting, freezing, evaporation, boiling, condensation, sublimation, explain them with the particle model, and plot a cooling-curve idea using ice and water safely.
Lesson 8Mixtures
Learn the difference between pure substances and mixtures, elements and compounds in simple terms, and types of mixture: solutions, suspensions and alloys, and decide how to classify everyday materials.
Lesson 9Separation methods
Learn methods for separating mixtures, sieving, filtering, magnets, evaporation, decanting and simple distillation by observation, choose the right method for a mixture and plan a separation of sand, salt and iron filings.
Lesson 10Physical and chemical changes introduction
Learn that physical changes (such as melting, dissolving and cutting) do not make new substances and can usually be reversed, while chemical changes (such as rusting, cooking and baking soda with vinegar) make new substances, and learn the signs of a chemical change using kitchen-safe demonstrations.