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List the properties you can use to identify them 1) Odour: What does it smell like???
Example: Milk and ammonia. They look the same in color but you can identify them by smelling each one. 2) Lustre: If it is a solid, is it shiny or dull??? Example: Aluminum and Iron. Aluminum is a silvery-colored solid and Iron is a gray solid. (Aluminum left, Iron right)
3) Colour: What colour is it or is it colorless???
Example: Maple and Pine (wood). To tell these two apart, you would look at their colours.
4) State: Is it a solid, liquid or a gas???
Example#1: An ice cube and an orange. An ice cube is frozen water so it is a solid and an orange is a solid . Example#2: Orange juice and CO2. CO2 is a gas and orange juice is a liquid. You can tell them apart because you can’t see the gas and the orange juice is a liquid.
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