Science 5
______16. Rusting of iron made materials is commonly caused by the?
a. presence of heat
b. absence of heat
c. presence of oxygen
d. absence of oxygen
______18. Which is NOT TRUE in the statement below?
a. burning a paper involes presence of heat.
b. cutting a banana in half is an example of physical change.
c. melted candle is a form if chemical change.
d. freezing water is a form of physical change.
______20. Kimberly wiped the top of the table with a wet piece of cloth. After a few minutes, it became dry. Why does the table dry up so quickly?
a. presence of heat
b. absence of heat
c. presence of water
d. absence of temperature