1.
An ice cream cone melts on a hot day is an example of
a. Chemical change b. physical change melting change d. none of the above
2. Burning woods change to ashes. What is the product of the application of heat in woods?
Ashes b. woods
burning d. all of the above
3. Charcoal burning on a the grill is an example of
Chemical change
b. physical change c. environmental change d. wood change
4. The presence or absence of oxygen in the materials may result in the
Burning of material b. melting of the material c. change in the material
5. Irons, nails and cans when exposed to moisture may develop a. rust b. dust c. heat d. fuel
6. The inner part of potatoes and apples change in color when cut because of
Fuel in it b. chemicals
c. exposure to heat d. exposure to oxygen
7. The process of burning materials with the aid of oxygen is called
conduction b.combustion c. oxidation d. reduction
8. The reaction of iron with moisture and oxygen in the air is called
a. Rusting
b. cleansing c. burning d. combustion
9. Owner of fish pond monitors and controls the population of fishes to avoid
a. a drop of oxygen b. fish kill c. increase level of oxygen d. acid
a.
a.
10. How can rusting be prevented? a. washing metal after use b. exposing material anywhere
c. arranging the material d.wiping the material with a dry cloth after use

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