Can I Make New Stuff Out of Old Stuff? IQWST 7 Grade Unit 1 Test

Flashcard
•
Science
•
7th Grade
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What happens to atoms during a chemical reaction?
Back
Atoms rearrange.
2.
FLASHCARD QUESTION
Front
What is produced when carbon dioxide (CO2) and water (H2O) react?
Back
H2CO3 (carbonic acid) is produced.
3.
FLASHCARD QUESTION
Front
How can you determine if two liquids are the same substance?
Back
Compare their properties: density, color, mass, and melting point.
4.
FLASHCARD QUESTION
Front
What does the Law of Conservation of Mass state?
Back
In a chemical reaction, the number of reactants must equal the number of products.
5.
FLASHCARD QUESTION
Front
What indicates that a chemical reaction has occurred?
Back
Evidence includes changes in color, temperature, gas production, or formation of a precipitate.
6.
FLASHCARD QUESTION
Front
What is a reactant in a chemical reaction?
Back
A reactant is a substance that undergoes change during a chemical reaction.
7.
FLASHCARD QUESTION
Front
What is a product in a chemical reaction?
Back
A product is a substance that is formed as a result of a chemical reaction.
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