Cr 3 2 - Scientific Method

Question 1

Validity (Scientific Definition):

Answer 1

• Validity refers to how accurately an experiment measures what it is intended to measure. An experiment is valid if the method, variables, and data collection directly test the hypothesis and the results are based on sound scientific reasoning.
• To ensure validity, only the independent variable should be changed, and all controlled variables should be kept constant.

Question 2

Reliability (Scientific Definition):

Answer 2

• Reliability refers to the consistency of results when an experiment is repeated under the same conditions.
• An experiment is reliable if repeating it (or having others replicate it) gives similar results each time. It can be improved by conducting multiple trials and averaging the results.