13.List 4 safety symbols that would be seen if you are working with a material that is biohazard, such as bacteria.

1. Skull and crossbones

2. A triangle (commonly painted colour red or yellow) with an exclamation sign inside.

3. biohazard symbol

4. A radiation sign in the form of a triangle, having other little image descriptions inside.

Explanation:

Note that a biohazard material refers to dangerous substances of biological (living) nature that can pose a threat to humans. Thus, safety symbols try as much as to draw attention to the descriptions used.

For example, skull and crossbones and biohazard symbols are used to indicate that a material that is biohazard, such as bacteria could result in the death of a person.

a - minimizes the chance of accidents occurring in the lab
Safety guidelines change from experiment to experiment. It does massively reduce the chance of accidents, however you can never say it prevents accidents, nothing can eliminate accidents completely.