physical and chemical properties and changes examples

When they are mixed together, each pure substance keeps its own properties. Mixtures are a physical combination of two or more pure substances. Water has different properties than hydrogen or oxygen. The properties of a compound are different from the properties of each element it contains. For example, water can be broken down into hydrogen and oxygen using electrolysis.

For example, a water molecule always has two hydrogen atoms (H) and one oxygen atom (O).Ĭompounds can be broken down into their individual elements. These are joined by two sets of thick, black, horizontal lines.Ĭompounds also have a fixed ratio. The CO2 diagram has a red sphere labelled 'C' in the centre, with one blue 'O' sphere on either side. These are joined by two thick, black, horizontal lines. The O2 diagram shows two blue spheres labelled 'O', side-by-side. Shown is a colour diagram of a molecule labelled O2 and a molecule labelled CO2 on a cream background. Here are some examples of chemical properties: This is labelled 'Length.' Chemical PropertiesĪ chemical property describes how likely it is the matter will go through a chemical reaction. The last illustration shows a ruler and a tape measure. The fourth shows a purple bathroom scale. On the bottom row, starting on the left, the first illustration is a red weight with 'KG' written on the front. The fifth is a bunch of red tulip flowers. The fourth is a shiny, gold-coloured bell. It is labelled 'Texture, Hardness, Malleability, Ductility, Temperature.' The third is a green cactus plant with prickles, in a red pot. The second is a yellow lemon with one leaf. Starting on the top left, the first illustration shows a rainbow and a gleaming pink gem. Shown is a colour illustration showing five examples of intensive properties and five examples of extensive properties.Įach illustration is on a pale blue circle against a cream background. These include things like mass, volume and length. They stay the same, whether you are studying one ounce of wood, or a tonne of it!Īn extensive property depends on the amount of matter. Colour, odour, density and melting point are intensive properties. Physical properties can be intensive or extensive.Īn intensive property does not depend on the amount of matter. These properties include boiling point, melting point, electrical conductivity, magnetism and density. Scientists do this without changing the matter. Some properties can’t be identified through the senses. This is labelled 'Smell.' Below is a bunch of red tulip flowers. The fifth illustration is a nose, shown from the side. This is labelled 'Hearing.' Below is a shiny, gold-coloured bell labelled 'Sound.' This is labelled 'Texture, Hardness, Malleability, Ductility, Temperature.' This is labelled 'Touch.' Below is a green cactus plant, with prickles, in a red pot. The third is a hand on a white background. This is labelled 'Taste.' Below is a yellow lemon with one leaf, labelled 'Acidity.' The next illustration on the top is a mouth with the tongue sticking out. This is labelled 'Sight.' Below is an illustration of a rainbow and a gleaming pink gem. Starting on the left, the first illustration shows a single blue eye. Shown is a colour illustration showing five senses and five examples of properties they can identify.Įach illustration is on a pale blue circle against a cream background. Open Professional Learning × Close Professional Learning Chemical: the formation of a precipitate and the color change from colorless to yellow indicate a chemical change.Open Educational Resources × Close Educational Resources.No color change occurred or other evidence of chemical change. The green mixture is still green and the colorless solution is still colorless. Physical: because none of the properties changed, this is a physical change.

Physical and chemical properties and changes examples