1 / 44

# Practice Quiz - PowerPoint PPT Presentation

Practice Quiz. Experiments and Variables. Directions. Click anywhere on the screen or hit the down arrow to move to the next slide. Write each answer on a piece of paper to test yourself. Count the number correct. Study the ideas and words that you get wrong. Good Luck!. Question 1:

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'Practice Quiz' - tasya

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### Practice Quiz

Experiments and Variables

• Click anywhere on the screen or hit the down arrow to move to the next slide.

• Write each answer on a piece of paper to test yourself. Count the number correct.

• Study the ideas and words that you get wrong. Good Luck!

What is a condition that can change in an experiment?

A variable

What kind of question is created before running a scientific experiment?

Research Question

(or Experimental Question)

What is a hypothesis?

A testable prediction of the outcome of a scientific experiment or study.

What is the variable that is tested in an experiment?

Independent Variable

What is definition for independent variable?

Condition in an experiment that the experimenter changes to test.

What was the independent variable in our first yeast experiment?

Sugar

What is a dependent variable?

The result in an experiment that is observed and measured.

What do scientists use to answer research questions?

Data

What were the dependent variables in both yeast experiments?

Foam height (cm)

What is a control group (or control trial)?

A test (or trial) that is done without making any changes.

Why are control groups or tests necessary in experiments?

We compare our results to the control trial to see what happens without the effect of the independent variable.

What are constants in experiments?

Conditions that are kept the same throughout the experiment.

Why do we keep conditions constant?

Constants are used to keep experimental tests fair and accurate.

Patrick thinks that kelp jerky is good to eat and will make the Bikini Bottom Gang spell better. He creates an experiment to test this. Group A (Spongebob, Patrick and Gary), will eat kelp jerky for one week but Group B (Sandy Cheeks, Mr. Krabs and Squidward) will eat their regular diet. Patrick counts the number of words they can spell correctly at the start of the experiment and after one week.

What is the independent variable in Patrick’s experiment?

The kelp jerky

What was the dependent variable in Patrick’s experiment?

The number of words each subject can spell correctly.

List two conditions held constant in this experiment.

The same number of subjects in each group, the same amount of time for the test.

What is the control group in this experiment? Why?

Group B because they ate their regular diet.

True or False-

A hypothesis is an educated guess.

False. A hypothesis is a prediction that can be tested.

True or False-

The experimenter controls the dependent variable.

False. The experimenter controls the independent variable.

True or False-

A researcher creates a hypothesis before creating an experiment.

True. The hypothesis must be created before an experiment is run.