Chemical reactions
Flashcard
•
Science
•
9th Grade
•
Hard
+8
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What are exothermic reactions?
Back
Exothermic reactions are chemical reactions that release energy, usually in the form of heat.
Tags
NGSS.HS-PS1-4
2.
FLASHCARD QUESTION
Front
What are endothermic processes?
Back
Endothermic processes are reactions that absorb energy from their surroundings, often resulting in a temperature decrease.
Tags
NGSS.HS-PS1-4
3.
FLASHCARD QUESTION
Front
What happens to heat in an endothermic reaction?
Back
In an endothermic reaction, heat is taken in or absorbed.
Tags
NGSS.HS-PS1-4
4.
FLASHCARD QUESTION
Front
What is the difference between a chemical change and a physical change?
Back
A chemical change results in the formation of new substances, while a physical change alters the form or appearance of a substance without changing its chemical composition.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-4
NGSS.MS-PS1-5
5.
FLASHCARD QUESTION
Front
What type of reaction is the melting of ice?
Back
The melting of ice is a physical change.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
6.
FLASHCARD QUESTION
Front
What is complete combustion?
Back
Complete combustion is a chemical reaction where a substance reacts with oxygen to produce carbon dioxide and water, releasing energy.
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
7.
FLASHCARD QUESTION
Front
What is the general equation for complete combustion of hydrocarbons?
Back
The general equation is: Hydrocarbon + O2 → CO2 + H2O.
Tags
NGSS.HS-PS1-7
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