Final answer:
A scientific question that could be investigated with an experiment is: Does the amount of fertilizer affect plant growth? An example of a scientific question that cannot be investigated is: What is the meaning of life?
Step-by-step explanation:
A scientific question that could be investigated with an experiment is: Does the amount of fertilizer affect plant growth? This question can be tested by setting up an experiment with multiple plants, giving each plant a different amount of fertilizer, and measuring their growth over time.
An example of a scientific question that cannot be investigated is: What is the meaning of life? This question is subjective and cannot be tested through scientific methods as it relies on personal beliefs and opinions.