
Chemical Reactions assessment
Flashcard
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Hard
Wayground Content
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16 questions
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1.
FLASHCARD QUESTION
Front
What does the number 3 represent in 4NH3?
Back
Subscript
2.
FLASHCARD QUESTION
Front
Which of the following shows signs of a chemical reaction? a red liquid and an orange solid are mixed to produce a gas and a green liquid. liquid water is taken to its freezing point and ice is formed. large trees are cut into logs to make firewood. water is added to a dark green liquid to produce a light green liquid.
Back
a red liquid and an orange solid are mixed to produce a gas and a green liquid.
3.
FLASHCARD QUESTION
Front
How would you describe this chemical formula? 3 H2O
Back
3 H2O molecules
4.
FLASHCARD QUESTION
Front
How many elements are in C6H12O6?
Back
3
5.
FLASHCARD QUESTION
Front
The Law of Conservation of Mass says that matter can neither be __________ or __________.
Back
created; destroyed
6.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process where substances (reactants) are transformed into new substances (products).
7.
FLASHCARD QUESTION
Front
What is a reactant in a chemical reaction?
Back
A substance that undergoes change during a chemical reaction.
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