This document discusses the difference between physical and chemical changes in matter. A physical change alters the form or properties of a substance without changing its chemical composition, such as cutting, crushing, dissolving, or changes in state. A chemical change results in one or more new substances being formed through chemical reactions, evidenced by signs like color change, bubbling, gas production or temperature change. Examples of physical changes given are melting ice, sawing wood, and evaporating a puddle. Chemical change examples include burning fuels, baking a cake, and dissolving sugar in tea.

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.  A Boiled egg
 Crushing an aspirin
Physical
Change

7.  Cutting paper?
Physical Change

8. Ice melting?
 Physical Change

9. Sawing
wood?
 Physical
Change

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
Chemical
Change

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

19.  Toast
burning?
Chemical
Change

20.  Rocket fuel burning?
Chemical
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.