Parts of a Controlled Experiment

How many variables can be tested in a controlled experiment?

• one
• two
• three
• as many as possible

Things that stay the same throughout the whole experiment are called

• controls
• dependent variables
• independent variables
• constants

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group
• control group
• data
• variables

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

• dependent variable
• independent variable
• data
• control group

Anything in an experiment that can  be changed.

• models
• variables
• explanation
• qualitative data

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour.

In Sendel's driving experiment, what is the independent variable?

• What time of day she drives

• The route she takes to work

• The speed at which she drives

• The time is takes to get to work

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour.

In Sendel's driving experiment, what is the control group?

• Highway

• Backroads

• Time she drives to work

• Rush hour

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour.

In Sendel's driving experiment, what is the experimental group?

• Highway

• Backroads

• Time she drives to work

• Rush hour

Tags

NGSS.MS-ETS1-3

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

Tags

NGSS.MS-PS1-2