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What is matter? | Anything that takes up space and has mass |
What is mass? | The amount of matter an object contains |
List the 3 states of matter | Solid, Liquid, Gas |
When something is solid the particles are________ | packed tightly together so they vibrate |
When something is liquid the particles are________ | moving and slide around one another. Have more energy than solids. |
When something is a gas the particles are__________ | spread far apart, filling any space they're in. Have more energy than liquid |
What is compression of gases? | Gas particles are spread far apart, compressing them forces them to be closer together in a smaller space |
List the 5 properties of solids | fixed mass, fixed volume, fixed shape, does not flow, does not compress |
List the 5 properties of liquids | fixed mass, fixed volume, no fixed shape, does flow, does not compress |
List the 5 properties of gases | fixed mass, no fixed volume, no fixed shape, does flow, does compress |
What is diffusion? | Diffusion is the spreading out of particles to fill the space they're in |
Give two examples of diffusion | Perfume and Cooking |
List 3 things that effect how quickly diffusion occurs | temperature (higher temperature, quicker diffusion), size of particles (smaller particles move quicker), state of matter (quickest in gases) |
What word describes a change from a solid to a liquid? | Melting |
What word describes a change from a liquid to a gas? | Evaporation/boiling |
What word describes the change from a gas to a liquid? | Condensation |
What word describes the change from a liquid to a solid? | Freezing |
What is melting point? | The temperature at which a substance melts |
What is freezing point? | The temperature at which a substance freezes |
What is evaporation? | Liquid particles are heated and become more energetic. They spread out to form a gas. |
What is boiling point? | The temperature at which a liquid changes to a gas |
What is condensation? | Cooling a gas takes energy from the particles so they slow down moving and come closer together to form a liquid |
List the 5 steps of the product life cycle | Extraction, manufactoring, packaging and distribution, product use, end-of-life disposal |
What is a carbon footprint? | The total greenhouse gas emissions caused by an organisation, event, product or individual |
What is a physical change? | Matter changes shape or state but no new substance is formed. Easy to reverse |
What is a chemical change? | A new substance is formed. not easy to reverse. |
What is law of conservation of mass? | Matter cannot be created or destroyed but can change from one form to another |