A) Because it is a fashion trend among scientists.
B) To avoid getting your eyelashes dirty.
C) To look more professional in the lab.
D) To protect your eyes from potential chemical splashes or spills.

A) To make the experiment more challenging.
B) To waste time in the lab.
C) To ensure safety, accuracy, and reproducibility of the results.
D) To demonstrate your independence from guidelines.

A) A group that cheats in the experiment.
B) A group in which the variable being tested is not applied, used as a baseline for comparison.
C) A group that does the experiment first.
D) A group that controls the experiment.

A) To show off your math skills.
B) To confuse the data analysis.
C) To ensure the reliability and validity of the results.
D) To impress your classmates.

A) Independent variables.
B) Constant variables.
C) Control variables.
D) Dependent variables.

A) Stopwatch
B) Thermometer
C) Ruler
D) Balance

A) To provide a testable prediction about the outcome of the experiment.
B) To provide a summary of the experiment after completion.
C) To make the experiment last longer.
D) To confuse the experimental process.

A) To confuse the validity of the initial results.
B) To discourage further experimentation.
C) To waste time and resources in the lab.
D) To ensure that the results are consistent and not due to chance or errors.