MUDI INTRO Parts of an Experiment

Parts of an Experiment

by Mr. Mudigonda

Multiple Choice

What is the definition of the independent variable?

• The variable the scientist measures / records

• The variable the scientist directly changes

• The variable the scientist keeps the same 

Multiple Choice

What is the independent variable in the experiment above? 

• The amount of sunlight

• The type of plant

• Plant height

• Starting height of plant

Multiple Choice

What is the definition of the dependent variable?

• The variable the scientist measures / records

• The variable the scientist directly changes

• The variable the scientist keeps the same

Multiple Choice

What is the dependent variable in the experiment above?

• The amount of sunlight

• The type of plant

• Plant height

• Starting height of plant

Multiple Choice

What is the definition of the control variable (constant)?

• The variable the scientist measures / records

• The variable the scientist directly changes

• The variable the scientist keeps the same

Multiple Select

Select all that apply. Which of the following are constants in the experiment above.

• The amount of sunlight

• The type of plant

• Plant height

• Starting height of plant

Multiple Choice

What is the definition of a controlled experiment? 

• An experiment with one independent variable

• A study where the scientist does not manipulate any variables

• An experiment with that has two independent variables

Open Ended

Is this a valid controlled experiment? How did you know?

Multiple Choice

How many groups are present in the picture above?

• 1

• 2

• 3

• 4

Multiple Choice

Which of the following pictures represents a controlled experiment? 

• Picture 1

• Picture 2

Multiple Choice

To ensure her plants have the proper nutrients, Kyra decides to add fertilizer to her experiment. She gives Home Depot Fertilizer to Group 1, Lowe’s Fertilizer to Group 2, and Walmart Fertilizer to Group 3. Is Kyra conducting a controlled experiment?

• No; Kyra is changing both the type of fertilizer and the amount of sunlight

• Yes; Kyra is only changing the amount of sunlight

• No; Kyra is measuring plant height

• Yes; Kyra is only changing the type of fertilizer

Multiple Select

Select all that apply. Which of the following variables should stay constant in Kyra’s experiment to test the effect of sunlight on plant growth?

• Amount of water

• Amount of sunlight

• Type of fertilizer

• Type of plant

• Amount of fertilizer