Chemical And Physical Properties and Changes

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Chemical And Physical Properties and Changes
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Physical Property

• Any characteristic of a material that you can
  observe, such as state, size or color.
• Other physical properties include
• Melting, freezing and boiling points.
• Density.

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Chemical Property

• A characteristic of a substance that indicates
  whether it can undergo a certain chemical change.
• Reactivity the ability of a substance to combine
  chemically with another substance.

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Chemical Property

• Flammability the ability of a substance to react
  in the presence of oxygen and burn when exposed
  to a flame.

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Physical and Chemical Properties

• Helium less dense than air
• white powder
• Baking soda
• reacts with oxygen
• malleable
• Iron nonflammable
• reacts with vinegar to
  produce bubbles

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Physical Change

• A change of matter from one form to another
  without a change in chemical properties
• Break a piece of chalk
• Making a gold ring

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Physical Change

• Physical changes do not change a substances
  identity
• Dissolving is a physical change creates a
  solution
• Mixtures can be physically seperated

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Chemical Change

• A change that occurs when a substance changes
  composition by forming one or more new
  substances.
• Burning and rusting are common examples.

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Chemical Change

• Chemical changes often cause color changes,
  fizzing or foaming, or the production of sound,
  heat, light, or odor.