What is a physical change?
7th Advanced Quarter 2 Summative Exam Review

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Science
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7th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and boiling.
2.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the breaking and forming of bonds. Examples include rusting and toasting bread.
3.
FLASHCARD QUESTION
Front
What are reactants in a chemical equation?
Back
Reactants are the starting substances in a chemical reaction, found on the left side of the equation. They undergo a change to form products.
4.
FLASHCARD QUESTION
Front
What are products in a chemical equation?
Back
Products are the substances formed as a result of a chemical reaction, found on the right side of the equation.
5.
FLASHCARD QUESTION
Front
What does the arrow in a chemical equation represent?
Back
The arrow in a chemical equation represents the direction of the reaction, indicating that reactants are transformed into products.
6.
FLASHCARD QUESTION
Front
How do you identify the number of atoms in a chemical formula?
Back
7.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.
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