Week 8: Science-Independent and Dependent Variables

Posljednje ažuriranje over 2 years ago

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.

Obavezno

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

Obavezno

Week 8: Science-Independent and Dependent Variables

Posljednje ažuriranje over 2 years ago

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.

Obavezno

Sort the variables based on whether they are independent or dependent

The number of bread slices you have
The number of sandwiches you can make

Independent
Dependent

Obavezno

Sort the variables based on whether they are independent or dependent

The temperature outside
The amount of ice cream sold at an ice cream shop

Independent
Dependent

Obavezno

Sort the variables based on whether they are independent or dependent

The number of people in line ahead of you
The amount of time you will need to wait

Independent
Dependent

Obavezno

Sort the variables based on whether they are independent or dependent

Size of lawn/yard
Amount of time it takes to cut the grass

Independent
Dependent

Obavezno

Sort the variables based on whether they are independent or dependent

Time spent studying unit
Grade on unit test

Independent
Dependent

Obavezno

Sort the variables based on whether they are independent or dependent

Number of books someone has read
Number of words in their vocabulary

Independent
Dependent

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.

Obavezno

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.

Stavka koja se može prevući		Odgovarajuća stavka
Water, amount of water, heating method		Dependent Variable
Amount of sugar dissolved (g)		Independent Variable
Temperature of water (Degrees C)		Constants

Obavezno

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

Stavka koja se može prevući		Odgovarajuća stavka
Amount of soil, amount of water provided		Dependent Variable
Size of plant or height(cm)		Independent Variable
Fertilizer (g)		Constants

Obavezno

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)

Stavka koja se može prevući		Odgovarajuća stavka
Type of motor		Independent
Voltage of electric motor (V)		Dependent
Speed of rotation (RPM)		Constants

Obavezno

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)

Stavka koja se može prevući		Odgovarajuća stavka
Height of candle (cm)		Independent
Type of candle, temp of room		Dependent
Time (m)		Constants

Obavezno

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.

Stavka koja se može prevući		Odgovarajuća stavka
Type of paper airplane, throwing speed		Independent
Number of paper clips		Dependent
Length of flight (cm)		Constants

Obavezno

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.

Stavka koja se može prevući		Odgovarajuća stavka
Kind of coffee, percolator, amount and type of water, perking time, electrical source.		Independent
Amount of coffee grounds		Dependent
Taste of coffee		Constants

Obavezno

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.

Stavka koja se može prevući		Odgovarajuća stavka
The mass of the rats		Independent
Type of rat, diet		Dependent
The amount of Vitamin A		Constants

Obavezno

Anna was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into a tub filled with salt water for eight hours. Anna wondered if steel would rust faster submerged in vinegar instead of saltwater.
To find out, Anna cut ten squares of steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with saltwater and the other group of squares into a tub filled with vinegar. Once an hour for eight hours, Anna counted the number of rusted steel squares in each group.

Stavka koja se može prevući		Odgovarajuća stavka
The number of rusted steel squares		Independent
The squares of steel, the time they soaked		Dependent
The type of liquid she used		Constants

Obavezno

Spencer's grandmother suggested that soaking berries in hot water might help prevent the berries from getting moldy.
To test this idea, Spencer harvested fresh blackberries and divided them evenly into eight bowls. He filled four of the bowls with room temperature water and the other four bowls with water heated to 125°F. Spencer let all of the berries soak in the water for 30 seconds. Then, he poured out the water and dried the berries. Spencer placed the two groups of bowls in the refrigerator, keeping each group separate. After five days, Spencer counted the number of moldy blackberries in each bowl.

Stavka koja se može prevući		Odgovarajuća stavka
The time soaked and refrigerated, the type of berry		Independent
The temperature of the water		Dependent
The number of moldy blackberries		Constants

Obavezno

Lillian's brother thought that crushed ice would keep his soda cooler than whole ice cubes.
To test this idea, Lillian divided a large bottle of soda equally among six glasses. Lillian added five whole ice cubes to each of the first three glasses while her brother crushed five ice cubes into small pieces before adding them to each of the other three glasses. Ten minutes after all the ice had been added to the glasses, Lillian used a thermometer to measure the temperature of the soda in each glass

Stavka koja se može prevući		Odgovarajuća stavka
The amount of ice, the glass used		Independent
The size of the ice cube pieces		Dependent
The temperature of the soda		Constants

Obavezno

Week 8: Science-Independent and Dependent Variables

Week 8: Science-Independent and Dependent Variables

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.

How long did this lesson take you to complete today?

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.

How long did this lesson take you to complete today?