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Bell Ringer Quiz 3 (Unit1) – TEKS 8.6E: Evidence of Chemical Reactions & Conservation of Mass
Quiz by Grade 8 Science - Texas Education Agency
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​Students performed a lab investigation on chemical reactions. The students put on goggles and plastic gloves and then followed these steps.
Which observation would indicate that a chemical reaction occurred?
The vinegar took the shape of the container in step 1.
The steel wool sank into the vinegar in step 3.
The temperature of the vinegar increased during step 4.
The steel wool changed shape during step 6.
​Students mixed two liquids in a beaker and listed their observations.
Based on these observations, which statement contains the best evidence that a chemical reaction occurred?
There is a change in shape.
There is a change in volume.
The two liquids mix into a solution.
The two liquids form a new substance.
Students performed a lab investigation on chemical reactions. The students put on goggles and plastic gloves and then followed these steps.
Which observation would indicate that a chemical reaction occurred?
Students mixed two liquids in a beaker and listed their observations.
Based on these observations, which statement contains the best evidence that a chemical reaction occurred?
