PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES
Name ____________________________
Identify the following as a chemical (C) or physical property (P):
______1.
______2.
______3.
______4.
______5.
______6.
______7.
blue color
density
flammability (burns)
solubility (dissolves)
reacts with acid
supports combustion
sour taste
______8. melting point
______9. reacts with water
______10. hardness
______11. boiling point
______12. luster
______13. odor
______14. reacts with air
Identify the following as physical (P) or chemical (C) changes.
_____1.
_____2.
_____3.
_____4.
_____5.
_____6.
_____7.
_____8.
NaCl (Table Salt) dissolves in water.
Ag (Silver) tarnishes.
An apple is cut.
Heat changes H2O to steam.
Baking soda reacts to vinger.
Fe (Iron) rusts.
Alcohol evaporates .
Ice melts.
______9. Milk sours.
______10. Sugar dissolves in water.
______11. Wood rots.
______12. Pancakes cook.
______13. Grass grows.
______14. A tire is inflated.
______15. Food is digested.
______16. Paper towel absorbs water.
Identify the following as an Intensive (I) or Extensive (E):
______1.
______2.
______3.
______4.
______5.
blue color
density
volume
temperature
size
______6. melting point
______7. mass
______8. hardness
______9. boiling point
______10. luster
Part B
Read each scenario. Decide whether a physical or chemical change has occurred and give evidence for your
decision. The first one has been done for you to use as an example.
Scenario
Physical or
Chemical
Change?
1.
Umm! A student removes a loaf of bread
hot from the oven. The student cuts a slice
off the loaf and spreads butter on it.
Physical
2.
Your friend decides to toast a piece of
bread, but leaves it in the toaster too long.
The bread is black and the kitchen if full of
smoke.
3.
You forgot to dry the bread knife when you
washed it and reddish brown spots
appeared on it.
4.
You blow dry your wet hair.
5.
In baking biscuits and other quick breads,
the baking powder reacts to release carbon
dioxide bubbles. The carbon dioxide
bubbles cause the dough to rise.
Evidence…
No change in substances.
No unexpected color change, temperature
change or gas given off.
Use the following Heating Curve to complete the questions below:
1. What letter represents:
a. Solid: __________
b. Liquid: _________
c. Gas: ___________
2. What is the boiling point? _____________
3. What is the melting point? _____________
4. If the substance above undergoes sublimation…
a. What is happening? ______________________
b. Is it a physical or chemical change? ________________