ALearners Task No. 8: Choose the letter of the BEST correct answer.Write the answers in your notebook.1. What change will happen to the slices of potato if they will be exposedto oxygen in the air?Color will change from brown to white C. The color will not changeB. Color will change from white to brownD. No changes in color2. What causes the rusting of iron nails or iron made materials in a wetcloth?A. presence of heatB. absence of heatC. presence of oxygenD. absence of oxygen3. When the candle was lighted, it melted into liquid and became solidagain after few seconds or in a minute. What causes these changes?I. presence of heatIII. absence of heatII. presence of oxygenIV. absence of oxygenA. I, II and IIIC. I and IIB. I and IVD. All of the above4. The candles melted by the application of heat. What change took placewhen solid candles became liquid?A. chemicalB. mechanicalC. no changeD. physical5. Which situation shows the presence of oxygen in a material?I. Lighting of a candleII. burning of fuelsIII. Combustion of enginesIV. putting off a lighted candleA. I, II and IIIC. I and IIB. I and IVD. All of the above
Answer (1)
Answer:What change will happen to the slices of potato if they will be exposed to oxygen in the air?B. Color will change from white to brownWhat causes the rusting of iron nails or iron made materials in a wet cloth?C. Presence of oxygenWhen the candle was lighted, it melted into liquid and became solid again after a few seconds or in a minute. What causes these changes?C. I and IIThe candles melted by the application of heat. What change took place when solid candles became liquid?D. PhysicalWhich situation shows the presence of oxygen in a material?A. I, II and III
