Experimental Design

What is the factor that an experimenter changes on purpose?

• Dependent Variable

• Independent Variable

• Constant

• Control

The part of the experiment that does NOT contain the independent variable. Used for comparison.

• Control Group

• Experimental Group

• Results

• Data

What are all the things that are kept the same in an experiment?

• controls
• data
• constants
• independent variables

Tags

CCSS.HSS.IC.B.3

Which term is another name for an educated guess?

• Hypothesis

• Good guess

• Scientific method

• Scientific notation.

Joe wants to find out how different temperatures affect the growth of bean plants.

What is Joe's independent variable?

• Temperature

• Height of Plant

• amount of water

• amount of sunlight

Joe wants to find out how different temperatures affect the growth of bean plants.

What was Joe's dependent variable?

• Temperature

• Height of bean plant

• amount of water

• amount of sunlight

Joe wants to find out how different temperatures affect the growth of bean plants.

Which of the following would NOT be a constant in Joe's experiment?

• amount of water

• temperature

• amount of sunlight

• amount of soil

Joe wants to find out how different temperatures affect the growth of bean plants. Joe predicted that a hot temperature would make bean plants grow the taller.

What was Joe's hypothesis?

• The hotter the temperature, the taller the bean plants will grow.

• The colder the temperature, the taller the bean plants will grow.

• Temperature will have no effect on the growth of bean plants.

Joe wants to find out how different temperatures affect the growth of bean plants. He placed one bean plant in a 15 degrees Celcius room, another in a 25 degrees Celcius room, and a third bean plant in a 35 degrees Celcius room. In nature, bean plants normally grow in an environment with an average temperature of 25 degrees.

Which bean plant represented Joe's control group?

• The bean plant at 15 degrees Celcius

• The bean plant at 25 degrees Celcius

• The bean plant at 35 degrees Celcius

A scientist is studying the question "How do different exercises effect a person's heart rate?". What is the independent variable?

• Heart Rate

• Number of people

• Type of Exercise

• Location