Name: ______________________________
Date: ________________
ws# ______
PHYSICAL VS. CHEMICAL CHANGES
Physical Property:
___________________
_____________________________________
_____________________________________
Examples: color, density, state, boiling
Chemical property:_________________________
___________________________________________________________
____________________________________________
Examples: flammable, reacts with air, reacts with
water, does not react
point, mass, volume, shape
Physical Change:
_____________________________________
_____________________________________
_____________________________________
1. A change that affects the
________________________of a
substance, but does not affect
the composition or chemical
properties.
2. Molecules
are__________________
3. ____________________ substance
is still there with only new
physical properties.
4. No ________________ substance
is formed.
Chemical Change:
___________________________________________
___________________________________________
___________________________________________
1. Change in matter in which one
substance is changed into another
substance .
2. Molecules ______________________.
3. Original substance is ______________.
4. An entirely new substance is formed
with new ____________________ and new
_____________________ properties
5. A chemical change may have occurred
if these are observed:
a. ________________________ change
b. _____________is formed (bubbling)
c. temperature change or light is
created
d. a solid is formed and settles to
the bottom of the container that
was not there before (called a
____________________)
Examples:
Examples:
Sharpening a pencil
Cut up an apple
Grinding a rock into powder
Dissolving sugar in water
Drying your clothes
Breaking glass
Changing from one state to another:
1) melting ice or freezing ice
2) evaporating water
3) dry ice sublimating to a gas
4) boiling soup
5) water condensing to form dew
Rusting or corrosion of any metal (tarnish, metals
reacting with air)
Digestion
Respiration (breathing)
Photosynthesis (plants)
Burning anything
A battery producing electricity
Spoiling of food or cooking food
Rotting plant material
Growth
Acids and Bases reacting
Metals reacting in water
????Physical vs Chemical????
Read Each Statement and determine whether it is a physical (P) or a chemical (C) change.
Place a P or C next to each number.
____1. The rock was broken into small pieces.
____ 2.That fabric is very flammable.
____ 3. Acids are corrosive.
____4. Carbon dioxide is dissolved into sodas to make them carbonated.
____5. A match burns because the tip is made of phosphorus.
____6. I love to dissolve a lot of sugar into my ice tea.
____7. I cut my hair yesterday.
____8. My hot showers cause condensation to appear up on the mirror.
____ 9. The fireworks explode and produce beautiful colors.
____10. No new substance is created when this change occurs.
____ 11. When these two chemicals reacted, there was a color change and the
temperature
increased.
____ 12. Before I mixed these two chemicals there was no gas present. Now I detect oxygen.
____13. The carbon dioxide was so cold it became a solid.
____14. The carbon dioxide gas was formed when the baking soda and vinegar reacted.
____15. Humans would not be able to survive if plants did not go through photosynthesis.
____16. My ice cream melted in the hot sun.
____17. A new substance is created when this type of change occurs.
____18. Thanksgiving dinners are very good to eat.
____19. Respiration (breathing) is very important to stay alive.
o
____20. Snowflakes form when the air temperature reaches 0 C.