physical and chemical changes

• What are physical changes?

  somethings that changes the pysical properties of a substance as in size,shape or form
• what is some examples of a physical change?

  changes in state of matter,dissolving sugar in water,cutting paper
• how do you tell a if there is an physical change?

  melting/boiling,bending or breaking an object,reversiable,no-new chemical made
• what is an chemical reaction?

  a reaction that rearranges the particals of two or more substances to create at least one new substance
• what is an example of a chemical reaction?

  burning wood,digesting food,fireworks
• how can you tell if there is an chemical reaction?

  colour change,gas made,temperture change,sound
• Hello I