Stemscopes Exam Science Safety and Lab Skills 2

Question 1

What is a control group in an experiment?

Accepted Answer

The group that is not exposed to the independent variable

Answer

The control group is not subjected to the independent variable and serves as a baseline for comparing the experimental results.

Question 2

How should broken glass be disposed of in a lab?

Accepted Answer

Place it in a designated sharps or broken glass container

Answer

Broken glass must be placed in a designated sharps or broken glass container to prevent injury to lab workers.

Question 3

What does the triple beam balance measure?

Accepted Answer

Mass

Answer

A triple beam balance is a precision instrument used to measure the mass of an object in grams.

Question 4

Which of the following is an example of a qualitative observation?

Accepted Answer

The liquid turned blue

Answer

A qualitative observation describes a characteristic without using numbers, such as color, texture, or smell.

Question 5

What is the purpose of repeating an experiment multiple times?

Accepted Answer

To increase reliability and reduce the effect of random errors

Answer

Repeating experiments increases the reliability of results by reducing the impact of random errors and anomalous data.

Stemscopes Exam Practice Test