Directions: Express your understanding of the lesson in this module by supplying the blanks in the following sentence with a word or a phrase. I learned that (1) either (2) application in matter results to and (3) The presence or absence of (4) effects matter. Common examples are (5) (6) has various and on - 3 Fire will continue its flame provided that there is continuous supply of (7) (8) and (9) In the absence of oxygen, there will be (10) that will occur. Another example of change in the material when oxygen is present is rusting. (11) is formed when iron and oxygen react with water or air moisture. Some changes in matter may results to (12) (13) effects on the environment. We have to do our share in maintaining (14) environment. We must (15) too much use of electricity and gasoline. We must also avoid (16) rubber tires and plastics. Lasty, we must try to minimize practices that will produce acid rain, increase global temperature, or deplete the ozone layer. au
