chemistry
chemistry
J .Madhfar
J .Madhfar
, “No matter what people tell you, words and ideas can change the world.”
— Robin Williams
Physical and Chemical Changes
Physical = same thing, just looks different
Chemical = something new is formed
Physical Change
No new substance is made
Only size, shape, or state changes
Often reversible
Examples: melting ice, cutting paper, boiling water
Chemical Change
A new substance is made
Usually not reversible
Often shows color change, gas, heat, or smell
Examples: burning wood, rusting iron, cooking an egg
Which physical change shows that a chemical reaction occurred?
Select the correct answer.
1.Evaporation
2.Solid formation
3.Gas formation
4.Mixing
chemistry
J .Madhfar
J .Madhfar
, “No matter what people tell you, words and ideas can change the world.”
— Robin Williams
Physical and Chemical Changes
Physical = same thing, just looks different
Chemical = something new is formed
Physical Change
No new substance is made
Only size, shape, or state changes
Often reversible
Examples: melting ice, cutting paper, boiling water
Chemical Change
A new substance is made
Usually not reversible
Often shows color change, gas, heat, or smell
Examples: burning wood, rusting iron, cooking an egg
Which physical change shows that a chemical reaction occurred?
Select the correct answer.
1.Evaporation
2.Solid formation
3.Gas formation
4.Mixing
