Question

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

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

1. you have been injured in the laboratory (cut, burn, etc.). first you should * 1 point

visit the school nurse after class
see a doctor after school
tell the science instructor at once
apply first aid yourself

Explanation:

When heating a substance in a test - tube, to prevent any potential splashing or release of harmful substances from injuring people, the open end should be pointed away from all people. In case of a laboratory injury, it is important to inform the science instructor immediately so that proper procedures and assistance can be arranged promptly.

Answer:

1. D. away from all people
2. C. tell the science instructor at once