Question

if a lab experiment is not completed, you should

• discuss the issue with your instructor
• sneak in after school and work alone
• come in during lunch
• make up some results

you are heating a substance in a test tube. always point the end of the tube

• toward yourself
• toward your lab partner
• toward another classmate
• away from all people

you are heating a glass and now want to pick it up. you should:

• use a rag or paper towels
• pick up the end that looks cooler
• use tongs
• pour cold water on it

Explanation:

1. For an incomplete lab experiment, consulting the instructor is the proper, safe, and protocol-compliant action; unsupervised work or falsifying results is unethical and risky.
2. Pointing a heated test tube away from people prevents injury if the substance splashes out.
3. Using tongs is the standard safe method to handle hot glass, avoiding burns from residual heat that may not be visible.

Answer:

1. discuss the issue with your instructor
2. away from all people
3. use tongs