Why are safety rules followed during scientific investigations?

Correct answer: To prevent accidents and harm

The direct answer is option B: to prevent accidents and harm. A scientific investigation may involve heat, glass, chemicals, electricity, sharp tools, or biological materials, so students must follow instructions, use suitable protection, handle equipment correctly, and report danger. Safety rules protect people as well as apparatus and samples. Option A is wrong because safety procedures are not designed to change results; careless behaviour can instead make results unreliable. Option B is correct because the main purpose is to reduce injury, damage, spills, burns, and other hazards. Option C is wrong because making an experiment longer is not a safety aim, although careful preparation may sometimes take extra time. Option D is wrong because hiding equipment is unsafe and prevents proper use and checking. A good exam cue is: before an experiment, read instructions, identify hazards, and use the required safety equipment.