Life Science Lesson

1.2.4 Life Science S1

Descriptive Investigation Tasks

• Ask questions

• Make observations

• Collect data

• Form a conclusion

Comparative Investigation Tasks

• Ask questions

• Make observations

• Collect data

• Compare

Open Ended

What would be an example of a DESCRIPTIVE investigation?

Open Ended

What could limit your ability to conduct a DESCRIPTIVE study of sea lions in Alaska?

Experimental Investigation

A planned series of actions that test whether or not a hypothesis is true

Multiple Choice

Name the type of investigation you would use:

Determining the number of birds in a park

• Descriptive

• Comparative

• Experimental

Multiple Choice

Name the type of investigation you would use:

Determining which type of battery will last longest in a flashlight

• Comparative

• Experimental

• Descriptive

Multiple Choice

Name the type of investigation you would use:

Determining how two rock samples are alike and different

• Experimental

• Descriptive

• Comparative

Experimental Investigation

• Hypothesis - an educated guess, usually an "If-Then" statement

• Controlled Experiment - ALL variables are controlled - all are kept the same and one is manipulated

Experimental Investigation

• Manipulated (Independent) Variable - what you change in a certain way whose effect is being studied

• Responding (Dependent) Variable - the one that changes in response to the manipulated (independent) variable

• Constant (Control) Variable - one or more variables that are kept the same for everything

Explain Each Variable

• Manipulated

• Responding

• Constant

Open Ended

Which variable is manipulated (the independent variable)?

Open Ended

Which variables are the constants (controls)?

Multiple Choice

Variable you change in a certain way whose effect is being studied

• Constant/Control

• Responding/Dependent

• Manipulated/Independent

Multiple Choice

Variable that you don't change at all - used as comparison

• Manipulated/Independent

• Constant/Control

• Responding/Dependent

Multiple Choice

Variable that changes in response to the manipulated variable

• Manipulated/Independent

• Constant/Control

• Responding/Dependent

Multiple Select

Scientists place three sunflower seeds in each of three identical containers. The containers are place in separate rooms with temperatures of 60 degrees, 75 degrees, and 90 degrees. Then they count how many grew in each container after two weeks. What are TWO constants in this experiment?

• Kind of container used

• The temperature of each room

• The number of sunflower plants that grew

• Number of seeds in each container

Multiple Choice

Scientists place three sunflower seeds in each of three identical containers. The containers are place in separate rooms with temperatures of 60 degrees, 75 degrees, and 90 degrees. Then they count how many grew in each container after two weeks. What is the responding/dependent variable in this experiment?

• Temperature in each room

• Number of seeds

• Number of sunflowers that grew

• containers

Multiple Choice

Scientists place three sunflower seeds in each of three identical containers. The containers are place in separate rooms with temperatures of 60 degrees, 75 degrees, and 90 degrees. Then they count how many grew in each container after two weeks. What is the Manipulated/Independent Variable in this experiment?

• Temperature in each room

• Number of seeds

• Number of sunflowers that grew

• containers

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