OCIOre 1. When a new substance is formed with different properties than the original substance it is called a a. physical change c. mechanical change b. chemical change d. both a and b a 2. Which of these is the product when iron is combined with water and oxygen? a tie wire b. rust d. galvanized iron c. nail 3. Rusting of iron easily occurs in which condition? a. near the seashore c. away from the seashore b. near the building d. away from the building 4. Which of these processes increases the amount of carbon dioxide in the air? a. burning garbage only c. using gasoline to fuel a car only b. forest fire only d. all of the above 5. Physical change does not alter its original composition but chemical change produces new substances. Which of these undergoes chemical change? a. exploding a firecracker c. cutting woods b. breaking a glass d. boiling a water a 6. The diagram shows solid + heat = liquid. What process does it show? a. freezing b. melting c. evaporating d. condensing 7 What conditi
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