A. Objective The learners should be able to investigate changes that happen in the absence of oxygen. B. Materials ● fire. Activity: TITLE: ABSENCE OF OXYGEN Jar with cover (Jar A) Jar without cover (Jar B) 2 same sized candle (small) Match or lighter Timer Ruler C. Precautionary Measure Remember to handle match or lighter carefully and don't play with it for it can cause D. Procedure 1. Label the jar with cover with Jar A and the jar without cover as Jar B. 2. Light the candles with a match and put the candles in each jar. 3. Record the time when the candles are lighted and the time when the light was put off. 4. Cover the Jar A and observe what will happen. 5. Measure the length of the candles after the flame was put off. 6. Record your findings on the chart below. Jars JAR A JAR B Time of the flame was put off Length of the candle after burning Answer the following questions: 1. Which of the 2 jars was the candle's flame put off first? 2. Which of the two candles has the shortest size? 3. What happen, when you cover the Jar A? 4. When the lighted candle in Jar A was covered, the flame was put off, what is the reason why the candle's flame did not continue to burn? 5. What are the 3 main components in combustion? Doss​

Let's Study and Analyze Read the stories below. Andy is a college student. When he was in high school, he knew nothing about the Internet. But college life introduced Andy to the Internet. His school provides low-cost access to the Internet. Soon Andy became so engrossed with using the Internet that he began to neglect his studies. Each day he would spend hours surfing the Internet, e-mailing friends and chatting. Because he was always surfing the Internet, Andy failed to do his homework and study for his exams. Andy failed in many of his classes. Why did Andy fail in his classes? 1. 14​

Answer:

Andy failed in his classes because he became engrossed with using the Internet and neglected his studies. As a college student, he was introduced to the Internet, which his school offered at a low cost. Andy spent hours each day surfing the Internet, emailing friends, and chatting, which resulted in him failing to do his homework and study for his exams. This excessive use of the Internet led him to prioritize online activities over his academic responsibilities, ultimately causing him to fail in many of his classes.