GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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matter is both created and destroyed
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matter is created
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matter is neither created nor destroyed
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matter is destroyed
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Detailed explanation-1: -Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change-none is created or destroyed. This concept is called the Law of Conservation of Mass .
Detailed explanation-2: -In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Detailed explanation-3: -The law of conservation of mass states that the net change in mass of the reactants and products before and after a chemical reaction is zero. This means mass can neither be created nor destroyed in other words, the total mass in a chemical reaction remains constant.
Detailed explanation-4: -According to the law of definite proportions, mass can neither be created nor destroyed in a chemical reaction.