Unit Test — Unit test Answers

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Miranda gets a small cut on her thumb after she breaks a beaker, and she begins to look around for the lab first aid kit. What important first step should she have taken?

A
She should have first called 911.
B
She should have first informed her whole class.
C
She should have first called a doctor or a nurse.
D
She should have first notified the teacher.
22
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Ingrid wrote the hypothesis below.If the temperature of a liquid increases, the density of the liquid decreases because the particles move farther apart.What are the variables in her hypothesis?

A
The independent variable is the temperature, and the dependent variable is the density.
B
The independent variable is the density, and the dependent variable is the temperature.
C
The independent variable is the temperature, and the dependent variable is the distance between particles.
D
The independent variable is the distance between particles, and the dependent variable is the temperature.
24

Why is newton's first law of motion considered a law and not a theory?

A
It is an unsupported idea.
B
It is based on multiple observations.
C
It has never been tested.
D
It was validated by a singular experiment.
25

Which is always the first step in dealing with an accident in the lab?

A
Call the emergency number, 911.
B
Call the fire department.
C
Notify the teacher.
D
Read the MSDS information.

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