What happens to the space between particles when a substance is heated?
Unit Review: Chemical Interactions

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Science
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7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The space between the particles increases.
2.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process where substances (reactants) are transformed into different substances (products) with different properties.
3.
FLASHCARD QUESTION
Front
What evidence indicates a chemical reaction has occurred?
Back
The products include different substances than the reactants.
4.
FLASHCARD QUESTION
Front
What is kinetic energy?
Back
The energy that an object possesses due to its motion.
5.
FLASHCARD QUESTION
Front
What happens to sugar when it melts?
Back
The kinetic energy of the sugar particles increases, allowing them to move past one another.
6.
FLASHCARD QUESTION
Front
What occurs when sugar dissolves in water?
Back
Liquid particles break sugar particles apart from one another.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.
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