IDENTIFY by writing: A if physical change B-If chemical change 21. cloud formation 22. Combustion of gasoline 33 Burning of sulfur in air 24. Sublimation of lodine crystals 25. Battery leakage 26. Dissolving sugar in water 37. Decomposition of limestone by heat 28. Souring of milk 29. Lighting a candle 30. Stretching a rubber band
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Answer numbers 21 to 30 pls.
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