Question

you have been injured in the laboratory (cut, burn, etc.). first you should visit the school nurse after class see a doctor after school tell the science instructor at once apply first aid yourself when gathering glassware and equipment for an experiment, you should read all directions carefully to know what equipment is necessary examine all glassware to check for chips or cracks clean any glassware that appears dirty all of the above

Explanation:

For the first question, in a laboratory, the immediate step after an injury (like cut, burn) is to inform the instructor. They can assess and guide proper next - steps (like getting first aid, seeing a nurse/doctor). Delaying (like after class/school) or self - administering first aid (without instructor's knowledge in a lab context where chemicals etc. might be involved) is not ideal.
For the second question, when gathering glassware and equipment:

• Reading directions helps in knowing the correct equipment.
• Examining glassware for chips/cracks prevents accidents during the experiment (e.g., a cracked beaker might break during heating).
• Cleaning dirty glassware ensures accurate experimental results (contamination can occur with dirty glassware). So all the options are correct.

Answer:

First question: tell the science instructor at once
Second question: All of the above