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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:

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practice quiz

Practice Quiz

Experiments and Variables

directions
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!
slide3
Question 1:

What is a condition that can change in an experiment?

slide4
Answer:

A variable

slide5
Question 2:

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

slide6
Answer:

Research Question

(or Experimental Question)

slide7
Question 3:

What is a hypothesis?

slide8
Answer:

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

slide9
Question 4:

What is the variable that is tested in an experiment?

slide10
Answer:

Independent Variable

slide11
Question 5:

What is definition for independent variable?

slide12
Answer:

Condition in an experiment that the experimenter changes to test.

slide13
Question 6:

What was the independent variable in our first yeast experiment?

slide14
Answer:

Sugar

slide15
Question 7:

What is a dependent variable?

slide16
Answer:

The result in an experiment that is observed and measured.

slide17
Question 8:

What do scientists use to answer research questions?

slide19
Question 9:

What were the dependent variables in both yeast experiments?

slide20
Answer:

Foam height (cm)

slide21
Question 10:

What is a control group (or control trial)?

slide22
Answer:

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

slide23
Question 11:

Why are control groups or tests necessary in experiments?

slide24
Answer:

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

slide25
Question 12:

What are constants in experiments?

slide26
Answer:

Conditions that are kept the same throughout the experiment.

slide27
Question 13:

Why do we keep conditions constant?

slide28
Answer:

Constants are used to keep experimental tests fair and accurate.

slide29
Practice Problem:

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.

slide30
Question 14:

What is the independent variable in Patrick’s experiment?

slide31
Answer:

The kelp jerky

slide32
Question 15:

What was the dependent variable in Patrick’s experiment?

slide33
Answer:

The number of words each subject can spell correctly.

slide34
Question 16:

List two conditions held constant in this experiment.

slide35
Answer:

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

slide36
Question 17:

What is the control group in this experiment? Why?

slide37
Answer:

Group B because they ate their regular diet.

slide38
Question 18:

True or False-

A hypothesis is an educated guess.

slide39
Answer:

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

slide40
Question 19:

True or False-

The experimenter controls the dependent variable.

slide41
Answer:

False. The experimenter controls the independent variable.

slide42
Question 20:

True or False-

A researcher creates a hypothesis before creating an experiment.

slide43
Answer:

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

slide44
How many did you get correct?

19-20 - Awesome! You’re ready - continue your review.

16-18 - Pretty good. You’re ready, but should review a bit more.

13-15 - Hmm. You need to study more.

< 13 - You really need to study your definitions and practice problems.

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