Explore the physical and chemical properties of matter, and understand changes of state in more depth.
Physical properties (like colour, density, and melting point) can be observed without changing the substance's identity. Chemical properties describe how a substance reacts to form new substances.
Is 'melting point' a physical or chemical property?
Physical property, since observing it doesn't change what the substance fundamentally is
Is 'reacts with acid to release gas' a physical or chemical property?
Chemical property, since it describes a reaction that forms new substances
Matter changes between solid, liquid, and gas states depending on temperature and pressure, with each change requiring or releasing energy.
Does melting ice absorb or release energy?
It absorbs energy (heat) from the surroundings to break the bonds holding the solid structure together
Does condensation of water vapour absorb or release energy?
It releases energy, as the particles slow down and come closer together to form a liquid
1. Is 'colour' a physical or chemical property?
2. Is 'burns in air to form ash' a physical or chemical property?
3. Does melting absorb or release energy?
4. Does freezing absorb or release energy?
5. Why does temperature stay constant while a substance is changing state (e.g. ice melting)?