Week 8: Science-Independent and Dependent Variables

Last updated about 2 years ago

17 questions

Required

Week 8: Science-Independent and Dependent Variables

Last updated about 2 years ago

17 questions

Welcome Back!  Week 8: Science-Independent and Dependent Variables (also known as IV and DV) has two videos.  The second video has additional information on constant variables.  There are about 16 questions that require identifing IV and DV.  

Be sure to attempt all the questions and submit when you are finished.   Please contact me through the comment feature or send an email to rshaw@fergflor if you have any questions.

Change in a dependent variable DEPENDS on change in an independent variable. For example, the amount of chairs in my classroom is DEPENDENT on the number of students in my class (independent). Having more students causes me to add more chairs. Having more chairs would not cause me to add more students.

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Independent Variable: The condition in the experiment that is changed on purpose
Dependent Variable: The condition in the experiment that results from that change
Constants: Conditions in experiments that are held constant (do not change)

A change in a dependent variable DEPENDS on change in an independent variable. For example, the amount of chairs in my classroom is DEPENDENT on the number of students in my class (independent). Having more students causes me to add more chairs. Having more chairs would not cause me to add more students.

Using the information in the following phrases or paragraphs, identify the independent variable, dependent variable, and any constants.

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Draggable item		Corresponding Item

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Draggable item		Corresponding Item

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Week 8: Science-Independent and Dependent Variables

Week 8: Science-Independent and Dependent Variables

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Sort the variables based on whether they are independent or dependent

Sort the variables based on whether they are independent or dependent

Sort the variables based on whether they are independent or dependent

Sort the variables based on whether they are independent or dependent

Sort the variables based on whether they are independent or dependent

Sort the variables based on whether they are independent or dependent

Does heating a cup of water allow it to dissolve more sugar? Temperature of the water is measured in degrees Centigrade. Amount of sugar is measured in grams.

Does fertilizer make a plant grow bigger? Amount of fertilizer measured in grams, quantities of water measured in milliliters.

Does an electric motor turn faster if you increase the voltage? Voltage of the electricity used is measured in volts. Speed of rotation measured in revolutions per minute (RPMs)

How fast does a candle burn? Time measured in minutes. Height of candle measured in centimeters at regular intervals of time (for example, every five minutes)

A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.

An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount and type of water, the same perking time, and the same electrical sources were used.

Four groups of similar-type rats are first massed and then fed identical diets except for the amount of vitamin A they receive. Each group gets a different amount of vitamin A. After 3 weeks on the diet, the rats’ masses are measured again to see if there has been a decrease.

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Draggable item		Corresponding Item
Water, amount of water, heating method		Dependent Variable
Amount of sugar dissolved (g)		Independent Variable
Temperature of water (Degrees C)		Constants

Draggable item		Corresponding Item
Amount of soil, amount of water provided		Dependent Variable
Size of plant or height(cm)		Independent Variable
Fertilizer (g)		Constants

Draggable item		Corresponding Item
Type of motor		Independent
Voltage of electric motor (V)		Dependent
Speed of rotation (RPM)		Constants

Draggable item		Corresponding Item
Height of candle (cm)		Independent
Type of candle, temp of room		Dependent
Time (m)		Constants

Draggable item		Corresponding Item
Type of paper airplane, throwing speed		Independent
Number of paper clips		Dependent
Length of flight (cm)		Constants

Draggable item		Corresponding Item
Kind of coffee, percolator, amount and type of water, perking time, electrical source.		Independent
Amount of coffee grounds		Dependent
Taste of coffee		Constants

Draggable item		Corresponding Item
The mass of the rats		Independent
Type of rat, diet		Dependent
The amount of Vitamin A		Constants

Draggable item		Corresponding Item
The number of rusted steel squares		Independent
The squares of steel, the time they soaked		Dependent
The type of liquid she used		Constants

Draggable item		Corresponding Item
The time soaked and refrigerated, the type of berry		Independent
The temperature of the water		Dependent
The number of moldy blackberries		Constants

Draggable item		Corresponding Item
The amount of ice, the glass used		Independent
The size of the ice cube pieces		Dependent
The temperature of the soda		Constants