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​

which does rodioactive decay play a very important role in eaths internal heat?​

Answer:

Radioactive decay, particularly from elements like uranium, thorium, and potassium, plays a crucial role in Earth's internal heat.

Explanation:

Radioactive decay, from elements like uranium, thorium, and potassium, generates heat within Earth, contributing to its internal temperature.

Answer:

Yes, radioactive decay plays a crucial role in Earth's internal heat. The heat produced by the decay of naturally radioactive elements such as uranium, thorium, and potassium is a significant source of the Earth's internal heat. This heat is responsible for the convection that drives plate tectonics and therefore, the creation of mountains, earthquakes, and volcanoes.

The decay of these elements releases energy in the form of heat, which warms the Earth's interior. This heat then contributes to the movement of the Earth's tectonic plates, which can lead to geological activity such as earthquakes and volcanic eruptions.