The changing of the colors of the iron when it is heated is an example of the physical change. When the iron is heated, the electrons gets excited and move to higher energy shells.
The formation of the gas bubbles in the boiling water is also an example of the physical change as no chemical reaction has taken place.
When the melted wax is poured into ice, the melted wax is formed. This is also an example of physical change, as just the state of the wax has changed.
When vinegar and baking soda are mixed, a chemical reaction takes place, which leads to the formation of the carbon-dioxide gas. This is an example of chemical change.
Hence, the answer is 'option D'.
Water intake is essential in the prevention of heat related injuries
Answer:
This stage takes place in the soil. Nitrogen moves from organic materials, such as manure or plant materials to an inorganic form of nitrogen that plants can use. Eventually, the plant's nutrients are used up and the plant dies and decomposes. This becomes important in the second stage of the nitrogen cycle.
Explanation:
Granum is what the answer should be