Chemical Interactions - Unit Review

Flashcard
•
Chemistry
•
6th - 7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the difference between cold air particles and hot air particles?
Back
Cold air particles are closer together, have less kinetic energy (KE), and move slower than hot air particles. They are not smaller than hot air particles.
2.
FLASHCARD QUESTION
Front
What is NOT a sign of a chemical change?
Back
A loss of transparency is NOT a sign of a chemical change.
3.
FLASHCARD QUESTION
Front
Which of the following is NOT evidence of a chemical reaction?
Back
Melting is NOT evidence of a chemical reaction.
4.
FLASHCARD QUESTION
Front
What does a balanced chemical equation represent?
Back
A balanced chemical equation shows that the number of atoms of each element is the same on both sides of the equation.
5.
FLASHCARD QUESTION
Front
In which direction does heat travel?
Back
Heat always travels from hot to cold objects.
6.
FLASHCARD QUESTION
Front
What is kinetic energy (KE)?
Back
Kinetic energy is the energy that an object possesses due to its motion.
7.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a process where substances combine or break apart to form new substances.
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