Stemscopes Exam Science Safety and Lab Skills

Question 1

What should you do first if a chemical splashes in your eyes in the lab?

Accepted Answer

Rinse eyes immediately with water for 15 minutes at the eyewash station

Answer

Immediately flushing the eyes with water for at least 15 minutes at an eyewash station is the correct first response to a chemical eye splash.

Question 2

Which piece of lab equipment is used to measure the volume of a liquid accurately?

Accepted Answer

Graduated cylinder

Answer

A graduated cylinder has precise volume markings and is used to accurately measure liquid volumes.

Question 3

What is the correct way to smell a chemical in the lab?

Accepted Answer

Waft the vapors toward your nose with your hand

Answer

The wafting technique—gently fanning vapors toward the nose—prevents inhaling potentially harmful concentrated fumes.

Question 4

Why should you wear safety goggles during a lab experiment?

Accepted Answer

They protect your eyes from chemical splashes and debris

Answer

Safety goggles protect the eyes from chemical splashes, flying particles, and other hazards present in lab settings.

Question 5

What does the MSDS (Material Safety Data Sheet) provide information about?

Accepted Answer

Hazards, handling, and emergency procedures for a chemical

Answer

An MSDS (now called SDS) provides critical information about a chemical's hazards, safe handling procedures, and emergency response.

Stemscopes Exam Practice Test