Which Waste Items Should Always Be Discarded In The Hazardous Waste Container Quizlet?

Bacterial cultures

should always be discarded in the hazardous waste container.

What is the main purpose of controlled variables in an experiment quizlet?

What is the main purpose of controlled variables in an experiment? They

help ensure that changes in the independent variable are affecting the dependent variable.

Which waste items should always be discarded in the hazardous waste container?

Under the Resource Conservation and Recovery Act (RCRA), all

solid biological and chemical wastes and discarded liquids and gases in containers

(like ingredients of discarded aerosol cans) must be disposed in a manner that will prevent pollution of the environment (usually, significant degradation of water quality, or …

What is the main purpose of controlled variables in experiment?

Control variables

enhance the internal validity of a study by limiting the influence of confounding and other extraneous variables

. This helps you establish a correlational or causal relationship between your variables of interest.

Which best describes scientific method?

scientific method: A method

of discovering knowledge about the natural world based

on making falsifiable predictions (hypotheses), testing them empirically, and developing peer-reviewed theories that best explain the known data.

Which tool will give the most accurate measurement?

Micrometers

.

The precision micrometer

is the most accurate handheld tool available to skilled operators. Some examples of micrometers include digital, vernier, inside and bench. Micrometers combine the double contact of a slide caliper with a precision screw adjustment that may be read with great accuracy.

Why do we always replace tops of reagent bottles immediately?

Always replacing bottle tops as

soon as you have finished dispensing reagents since many compounds react with moisture in the air

, with oxygen or with carbon dioxide. Others are volatile and evaporate. … If you do remove the reagent from the common work area temporarily, replace it as soon as possible.

What is the affected variable in an experiment?

A dependent variable

is what you measure in the experiment and what is affected during the experiment. The dependent variable responds to the independent variable. It is called dependent because it “depends” on the independent variable.

Which of the following is a controlled variable?

Temperature

is a common type of controlled variable. If a temperature is held constant during an experiment, it is controlled. Other examples of controlled variables could be an amount of light, using the same type of glassware, constant humidity, or duration of an experiment.

What variable is changed in an experiment?

The independent variable

is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable. As the scientist changes the independent variable, he or she records the data that they collect.

What is a controlled variable example?

Examples of Controlled Variables

Temperature is

a much common type of controlled variable. Because if the temperature is held constant during an experiment, it is controlled. Some other examples of controlled variables could be the amount of light or constant humidity or duration of an experiment etc.

How do you identify a controlled variable?

Control variables =

the type of plant used

, the amount of fertiliser given, the time given to grow. And all other conditions kept the same between each plant e.g. the amount of water each plant receives, the temperature of the room, the amount of sunlight etc.

Why are constant variables important?

It’s important to use constants in an experiment

because they allow you to isolate a particular variable (the independent variable)

. … If you were to have multiple independent variables in an experiment, it would be extremely difficult to figure out how each factor was influencing the results.

What are the 10 steps of the Scientific Method?

• Make an observation. …
• Ask a question. …
• Propose a hypothesis. …
• Make predictions. …
• Test the predictions. …
• Iterate.

What is the 6 scientific method?

The six steps of the scientific method include: 1)

asking a question about something you observe

, 2) doing background research to learn what is already known about the topic, 3) constructing a hypothesis, 4) experimenting to test the hypothesis, 5) analyzing the data from the experiment and drawing conclusions, and 6) …

What is another name for the Scientific Method?