A physical change alters the form of a substance but does not change its chemical composition. Examples of physical changes include crushing an aspirin, cutting paper, melting ice, and sawing wood. A chemical change results in one or more new substances being formed because the chemical composition of the original substance has changed. Examples of chemical changes include burning logs, dissolving sugar in tea, and burning rocket fuel.

1. NEENA HARIDAS
Physical Science Reg. No: 13971014

2. To study the difference between
a physical and chemical
change.

3. Matter is everywhere.
Matter is anything that takes up space
and has mass.
Matter is constantly experiencing both
chemical and physical changes.

4. A physical change alters the form of a
substance, but does not change it to another
substance.
It changes shape or size
It dissolves.
It changes phase (freezes,
boils, evaporates, condenses)
Example:
Making Orange Juice

5. Physical changes occur when matter changes its
property but not its chemical nature.
Physical property changes could include a change
in: texture, shape, size, color, odor, volume, mass,
weight, and density.

6. Crushing an aspirin
A Boiled egg

7. Cutting paper?
Physical Change

8. Physical Change
Ice melting?

9. Physical
Change
Sawing
wood?

10. Disappearing
puddle?
Physical
Change

11. Dry ice?
Physical Change

12. Chemical changes are changes matter undergoes
when it becomes new or different matter.
It burns
Temperature changes without heating/cooling
It bubbles (makes a gas)
It changes color
It forms a precipitate

13. When a substance undergoes a chemical
change, it is changed into a different
substance with different properties.
To identify a chemical change look for signs
such as color change, bubbling and fizzing,
light production, smoke, and presence of
heat.
Example:
Baking a Cake

14. 1. Precipitation
2. Color Change

15. 4. Temperature
Change
3. Gas Production

16. A chemical change occurs when fireworks are
used. Fireworks are made of metals such as
magnesium and copper. These change chemically
as they light up the sky.

17. Lighter fluid burining

18. Sugar dissolving in tea
Examples for Chemical Change
Logs burning
Breaking water
up by separating
it into hydrogen
and oxygen

19. Toast
burning?
❖Chemica
l
Change

20. Rocket fuel burning?
❖Chemica
l Change

21. Metal rusting?
Chemical Change

22. Candle
burning?
Chemical
Change

23. Tears up paper?
Physical change
Mixes salt and water?
Physical change
Burns paper?
Chemical change
Evaporates salt water?
Physical change
Mixes vinegar and baking soda?
Chemical change

24. Write a paragraph about the difference
between a chemical and physical change.
Give examples of each.