What is the first step in the scientific inquiry process according to the passage?

• Thinking and questioning

• Conducting experiments

• Collecting data

• Communicating results

Which of the following is a manipulated variable in the cricket chirping experiment?

• Air temperature

• Number of cricket chirps

• Food availability

• Hours of daylight

What is a hypothesis in scientific inquiry?

• A possible answer to a scientific question

• A confirmed observation

• A scientific law

• A well-tested explanation

What must be kept the same in a controlled experiment to ensure valid results?

• All variables except the manipulated variable

• Only the responding variable

• All variables including the manipulated variable

• None of the variables

What is the role of a scientific theory according to the passage?

• To provide a well-tested explanation for a wide range of observations

• To describe an observed pattern in nature

• To propose a possible answer to a scientific question

• To manipulate variables in an experiment

Layla wonders if different heat settings on her hair straightener affect how long her hair stays straight.
She straightens a 25 cm lock of hair with her flat iron set at 250°F, 300°F, 350°F, 400°F, and 450°F. She uses the same brand and amount of heat protectant spray, waits until the straightener is fully heated to each temperature, and straightens each lock with one slow pass. Then she checks how many hours pass before the hair starts to curl again.

What is the Manipulated (Ind.) Variable:

• What is the Responding (Dep.) Variable:

• Name the 3 of 6 constants identified in the experiment description: