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​

What is world system theory in 10 sentences

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Answer:

World-system theory, developed by sociologist Immanuel Wallerstein, offers a framework for understanding the global economic and political structures. It posits that the world is divided into a core, periphery, and semi-periphery. The core nations, including the United States and Western European countries, dominate and exploit the peripheral and semi-peripheral nations. Peripheral nations often provide cheap labor and raw materials, while core nations control the production and distribution of goods, resulting in unequal economic relations. Semi-peripheral nations, such as Brazil and India, hold intermediate positions, benefiting somewhat from the global system but also exploited by core nations. World-system theory emphasizes the historical development of capitalism and colonialism as central to understanding global inequalities. It highlights the interconnectedness of nations through economic exchange and dependency relationships. The theory also considers how political and military power reinforce economic dominance, with core nations often exerting influence through institutions like the World Bank and the International Monetary Fund. Over time, world-system theory suggests that the global system undergoes structural changes, but the core-periphery hierarchy persists, perpetuating disparities between nations.