Answer:
(1)OXYGEN
(2)ABSENCE
(3) PRESENCE
(4) OXYGEN
(5)BURNING
(6)RUSTING
(7)FUEL
(8)HEAT
(9)OXYGEN
(10)FIRE
(11)RUST
(12) GOOD
(13)BAD
(14) HEALTHY
(15) AVOID
(16) BURNING
Explanation:
I learned that (1)OXYGEN application in matter results to either (2)ABSENCE and (3) PRESENCE.
The presence or absence of (4) OXYGEN has various effects on matter.
Common examples are (5)BURNING and (6)RUSTING.
Fire will continue its flame provided that there is continuous supply of
(7)FUEL, (8)HEAT, and (9)OXYGEN
. In the absence of oxygen, there will be no (10)FIRE that will occur.
An example of change in the material when oxygen is present is rusting.
(11)RUST is formed when iron and oxygen react with water or air moisture.
Some changes in matter may results to (12) GOOD or (13)BAD effects in the
environment. We have to do our share in maintaining (14) HEALTHY environment.
We must (15) AVOID too much use of electricity and gasoline. We must also avoid (16) BURNING rubber tires and plastics. We must avoid practices that will produce acid rain, increase global temperature, or deplete the ozone layer.
