Chemical Changes (U6L3)
Flashcard
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Science
•
5th Grade
•
Practice Problem
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Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What are reactants in a chemical equation?
Back
Reactants are the substances that undergo a chemical change in a reaction, found on the left side of a chemical equation.
2.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that the total mass of reactants in a chemical reaction is equal to the total mass of the products.
3.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A chemical reaction is a process where substances (reactants) are transformed into new substances (products) with different properties.
4.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically bond together.
5.
FLASHCARD QUESTION
Front
What is the pH scale?
Back
The pH scale measures how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.
6.
FLASHCARD QUESTION
Front
What happens to the mass during a chemical reaction?
Back
The mass is conserved; it does not change during a chemical reaction.
7.
FLASHCARD QUESTION
Front
What is an acid?
Back
An acid is a substance that has a pH less than 7 and can donate protons (H+) in a solution.
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