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Chemical and Physical Properties and Change (Chemical Properties (odor…
Chemical and Physical Properties and Change
Physical Properties
Color
characteristics of a substance that can be observed without changing a substance
Shape
We should know physical properties because we use physical properties is qualitative observations.
Chemical Properties
Reactivity
How substances can form different substances.
Flammable
odor production
temperature change
permanent color change
forms gas
forms a solid
energy is released
We should know chemical properties so we can be more safe. An example of this would be knowing that if something is flammable, it shouldn't be by an open flame.
Chemical Change
Rust
Different substance is formed and it cannot be reversed
Fireworks
We should know chemical change so we know what it is like and maybe even prevent it from happening. For example. we can prevent rust because rust is bad for things around us and can harm our vehicles.
Physical Change
Gas to liquid
Changes a substance's property but not the substance itself
Liquid to gas
It is important to understand physical change because we should know when something can be reversed back to a previous state or to a whole new state.
