Here are the most appropriate answers to each of the questions you've provided:
Question 1: Why is it important to form a hypothesis when conducting a scientific investigation?
Answer: A hypothesis offers a testable statement that guides the direction of the experiment.
Question 2: Which of the following is NOT a limitation of science?
Answer: Science is always changing. (This reflects the nature of science adapting to new information rather than being a limitation.)
Question 3: Which of the following best describes the dangers of handling corrosive materials in a laboratory?
Answer: Corrosive materials can damage and destroy living tissues upon contact, as well as corrode metals and other materials.
Question 4: Which of the following is a scientific statement?
Answer: Water boils at 100 degrees Celsius at standard atmospheric pressure.
Question 5: Why is it necessary to test a hypothesis in scientific research?
Answer: To collect data that can confirm or contradict the hypothesis.
Question 6: What is the best definition of a scientific theory?
Answer: A well-substantiated explanation of an aspect of the natural world that is based on a body of evidence and has been repeatedly confirmed through observation and experimentation.
Question 7: Why can scientists never prove a theory absolutely?
Answer: Because new evidence or observations could potentially contradict or modify the theory.
Feel free to ask if you have more questions or need further clarification!