Independent and Dependent Variables

​Independent & Dependent Variables

Exploring the Nature of Science

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What are some components of an experiment?

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Turn & Talk

Variables

​there are 3 types:

Some of the components of an experiment

Independent

Constant

Dependent

Independent of other variables +
it changes through the experiment based on scientist's decisions

Does not change through the experiment. It is constant the whole time

Dependent on what's going on with the independent.

Multiple Select

Harmony wants to know if her plant will grow taller if she gives it more water.

She gives her plant extra water to find out.

What are the two variables?

• The amount of light given to the plant

• The amount of water given to the plant.

• The growth of the plant.

• The plant's health.

Multiple Choice

Harmony wants to know if her plant will grow taller if she gives it more water.

She gives her plant extra water to find out.

What variable that scientists decided to change before the experiment?

• The amount of light given to the plant

• The amount of water given to the plant.

• The growth of the plant.

• The plant's health.

​What are all the possible conclusions of Harmony's experiment?

Multiple Choice

The dependent variable refers to what may be changed as a result of the independent variable (amount of water given to the plant),

What is the dependent variable of Harmony's experiment?

• The plant hydration.

• If the leaves wilt.

• The plant growth.

​Independent Variable

​A variable that has the capacity to change another variable
This is the TEST variable that WE change in an experiment.

​Dependent Variable

A variable that MAY change as a result of changes to the INDEPENDENT variable

Multiple Choice

Jayceon tests if time he goes to sleep affects the time he wakes up the next morning

Which variable is INDEPENDENT & unaffected by the other

• Jayceon's Wake-Up Time

• Jayceon's Bedtime

​Now we will be doing a practice!

​https://wayground.com/embed/quiz/689b73558f16f5b11e5846be

​"Control Groups"

​The group that is not receiving any new treatment/conditions. So they may get no treatment, or get the standard/original treatment

Multiple Choice

Which group is not a type of control group.

• A group receiving a new experimental treatment

• A group receiving no treatment.

• A group receiving normal/standard treatment

Turn and Talk

You currently wash your clothes with Tide, but your friend says Glade makes your clothes smell better.

How would you test if Glade makes your clothes smell better than Tide?

Dependent?

​Independent?

Variables

Dependent?

​Independent?

Variables

​Brand of detergent

(Tide v. Glade)

How good the laundry smells

Multiple Choice

What would be the BEST control group for the comparison between Tide and Glade laundry?

• A load of laundry done with Tide

• A load of laundry done with Glade

• A load of laundry with no detergent.

• A load of laundry with Homemade Detergent