Question

1. a student wants to test how the amount of sunlight affects the growth of a plant. they place one plant in full sunlight, one in partial sunlight, and one in shade. they give each plant the same amount of water and use the same type of soil. label the following variables: independent variable, dependent variable, and/or controlled variable. ____ plant growth __ type of soil __ amount of sunlight __ amount of water 3. a student wants to find out if the type of liquid affects how fast ice melts. they place the same size ice cube into four cups: one with water, one with saltwater, one with text partially cut off, and one with soda. all the cups are kept at the same temperature. label the following variables: independent variable, dependent variable, and/or controlled variable. __ size of ice cube __ type of liquid ____ time for the ice to melt

Explanation:

Question 2 (Plant Growth Experiment)

Step 1: Recall Variable Definitions

• Independent Variable (IV): The variable the experimenter changes (cause).
• Dependent Variable (DV): The variable that changes in response (effect).
• Controlled Variable (CV): Variables kept constant to ensure a fair test.

Step 2: Analyze "Plant Growth"

Plant growth depends on the amount of sunlight (the IV). So it is the Dependent Variable (DV).

Step 3: Analyze "Type of Soil"

The experimenter uses the same type of soil for all plants. So it is a Controlled Variable (CV).

Step 4: Analyze "Amount of Sunlight"

The experimenter changes the amount of sunlight (full, partial, shade). So it is the Independent Variable (IV).

Step 5: Analyze "Amount of Water"

The experimenter gives the same amount of water to all plants. So it is a Controlled Variable (CV).

Question 3 (Ice Melting Experiment)

Step 1: Recall Variable Definitions

• Independent Variable (IV): The variable the experimenter changes (cause).
• Dependent Variable (DV): The variable that changes in response (effect).
• Controlled Variable (CV): Variables kept constant to ensure a fair test.

Step 2: Analyze "Size of Ice Cube"

The experimenter uses the same size ice cube for all cups. So it is a Controlled Variable (CV).

Step 3: Analyze "Type of Liquid"

The experimenter changes the type of liquid (water, saltwater, soda). So it is the Independent Variable (IV).

Step 4: Analyze "Time for the Ice to Melt"

The time to melt depends on the type of liquid (the IV). So it is the Dependent Variable (DV).

Final Answers (Question 2)

• Plant Growth: Dependent Variable
• Type of Soil: Controlled Variable
• Amount of Sunlight: Independent Variable
• Amount of Water: Controlled Variable

Final Answers (Question 3)

• Size of Ice Cube: Controlled Variable
• Type of Liquid: Independent Variable
• Time for the Ice to Melt: Dependent Variable

Answer:

Question 2 (Plant Growth Experiment)

Step 1: Recall Variable Definitions

• Independent Variable (IV): The variable the experimenter changes (cause).
• Dependent Variable (DV): The variable that changes in response (effect).
• Controlled Variable (CV): Variables kept constant to ensure a fair test.

Step 2: Analyze "Plant Growth"

Plant growth depends on the amount of sunlight (the IV). So it is the Dependent Variable (DV).

Step 3: Analyze "Type of Soil"

The experimenter uses the same type of soil for all plants. So it is a Controlled Variable (CV).

Step 4: Analyze "Amount of Sunlight"

The experimenter changes the amount of sunlight (full, partial, shade). So it is the Independent Variable (IV).

Step 5: Analyze "Amount of Water"

The experimenter gives the same amount of water to all plants. So it is a Controlled Variable (CV).

Question 3 (Ice Melting Experiment)

Step 1: Recall Variable Definitions

• Independent Variable (IV): The variable the experimenter changes (cause).
• Dependent Variable (DV): The variable that changes in response (effect).
• Controlled Variable (CV): Variables kept constant to ensure a fair test.

Step 2: Analyze "Size of Ice Cube"

The experimenter uses the same size ice cube for all cups. So it is a Controlled Variable (CV).

Step 3: Analyze "Type of Liquid"

The experimenter changes the type of liquid (water, saltwater, soda). So it is the Independent Variable (IV).

Step 4: Analyze "Time for the Ice to Melt"

The time to melt depends on the type of liquid (the IV). So it is the Dependent Variable (DV).

Final Answers (Question 2)

• Plant Growth: Dependent Variable
• Type of Soil: Controlled Variable
• Amount of Sunlight: Independent Variable
• Amount of Water: Controlled Variable

Final Answers (Question 3)

• Size of Ice Cube: Controlled Variable
• Type of Liquid: Independent Variable
• Time for the Ice to Melt: Dependent Variable