Question

science 7 hindenburg explosion post-test (paper version)
heat hazard insulating gloves safety goggles

1. a student sees the following safety symbols associated with an investigation. the assignment instructions indicate that a chemical reaction will occur when the student combines two clear non-toxic liquids that are at room temperature. based on the safety symbols shown above, what evidence of a chemical reaction will the student likely observe?

a. the liquids will change color.
b. the liquids will turn into solids.
c. the liquids will release toxic gas.
d. the liquids will generate thermal energy.

Explanation:

Step1: Analyze each option

• Option A: There is no symbol indicating a color - change in the given safety symbols.
• Option B: No symbol implies a liquid - to - solid phase change.
• Option C: The problem states the liquids are non - toxic, so this is incorrect.
• Option D: The "Heat hazard" symbol indicates that thermal energy (heat) will be generated.

Answer:

D. The liquids will generate thermal energy.