Question

practice it! select the statement(s) that accurately identify limitations of experimental investigations. small things can make the experiment unreliable or invalid. not all experiments are typical of real - life situations or events as they would happen in nature. some experiments cannot be reproduced in the natural world because of cost or ethical concerns. there is no precision during experiments. variables are difficult to control, and the test variable cannot be found.

Explanation:

1. Small, unaccounted - for factors can indeed invalidate an experiment.
2. Experiments are often controlled settings and may not mimic real - life accurately.
3. Cost and ethical issues can prevent natural - world reproduction of experiments. Precision can be achieved in experiments, so the statement about lack of precision is incorrect. Variables can be controlled in well - designed experiments, so the statement about difficulty in finding and controlling variables is an over - generalization.

Answer:

Small things can make the experiment unreliable or invalid.
Not all experiments are typical of real - life situations or events as they would happen in nature.
Some experiments cannot be reproduced in the natural world because of cost or ethical concerns.