Parts of an Experiment Practice

The variable that is measured.

• Controlled Variable

• Dependent Variable

• Independent Variable

Tags

NGSS.MS-PS2-2

The one factor that a scientist changes during an experiment.

• Controlled Variable

• Dependent Variable

• Independent Variable

An experiment is conducted to test how different cleats change an athletes running speed.  Six different types of cleats are tested and the 100m run time is recorded.  What is the independent variable?

• The type of cleat
• The run time
• The 100 meters
• The athlete

A test is set up to test which brand of soda creates the biggest foam explosion when adding a Mentos candy.  Three different sodas were tested. They measured the height of the foam eruption.   What is the dependent variable?

• Brand of soda
• Number of mentos candies used
• Height of foam eruption
• Temperature of soda

A student wants to test the effects of different types of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

This variable is the actual data collected during the experiment. 

• independent variable
• dependent variable
• control group
• data group

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

Tags

NGSS.MS-PS2-2

Why is it important to have only one independent variable and to control the other variables when performing science experiments?

• So you can tell which factor is causing the change in the experiment.

• It does not matter, you can have as many independent variables as you want.

Gatorade wants to sell more sports drinks so they decide to add more sugar. They bring two groups in to assess the new drink. For Group A they give them gatoradewith an added teaspoon of sugar. For Group B they give them plain gatorade without adding sugar. Which Group is the CONTROL GROUP?

• Group A

• Group B

• The Gatorade

• The Company

Steve wanted to see if different types of fertilizer influence sunflower growth. What is the control group?

• type of fertilizer

• sunflower grown without fertilizer

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1