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​

The following are the functions of the skeletal system,exept​

Answer:

The skeletal system protects the bones, which are living tissues responsible for supporting the body's structure and protecting vital organs. It also helps the joints move, allowing people and animals to walk, run, jump, and swim. The bones also store minerals and create red blood cells, and the ligaments and tendons help to connect different muscles and bones. The bones also act as a storehouse for calcium, which helps to build strong teeth and bones. The bones also help to protect the brain and spinal cord, which are important organs in the body, and help to stabilize the body during movement. The bones also help to create white blood cells which play an important role in the fight against infection and help to control the growth of cancers. So, the functions of the skeletal system are Protection, Movement, Storage of minerals, blood cell production, protection of vital organs and the brain, bone stability and support, white blood cell production, controlling cancer cell growth, and tissue repair.

Explanation: