Crafting Testable Questions in Scientific Investigations

The video tutorial explains how to formulate testable questions for scientific investigations. It covers the concept of variables, including independent and dependent variables, and provides examples of testable questions. The tutorial also discusses the importance of controls in experiments and how to convert general questions into testable ones. It emphasizes that a testable question involves changing one variable to observe the effect on another.

What is a key characteristic of a testable question?

• It is based on opinions.

• It involves changing one variable to see its effect on another.

• It can be answered by a survey.

• It requires multiple independent variables.

Which of the following is an independent variable in an experiment?

• The result of the experiment

• The variable that is measured

• The constant factor in the experiment

• The variable that is changed by the scientist

In the question 'Does changing the height of the ramp affect the speed of a car?', what is the dependent variable?

• The height of the ramp

• The material of the ramp

• The speed of the car

• The type of car

What is the first step in turning a general question into a testable question?

• Write a hypothesis

• Conduct an experiment

• Read the question carefully

• Identify the controls

Which of the following is an example of a testable question format?

• How do plants photosynthesize?

• Why do plants grow?

• What is the effect of light on plant growth?

• What makes plants green?

What should remain constant in an experiment to ensure valid results?

• The hypothesis

• The controls

• The independent variable

• The dependent variable

How can you make the question 'How does a paper airplane fly?' testable?

• By measuring the weight of the airplane

• By asking why airplanes fly

• By changing the color of the airplane

• By identifying the type of paper as the independent variable and the distance flown as the dependent variable

What is the role of controls in an experiment?

• To measure the dependent variable

• To change the outcome

• To remain constant and ensure only one variable is tested

• To act as the independent variable

Which of the following is NOT a testable question?

• What is the effect of temperature on ice melting?

• How does the type of soil affect plant growth?

• Why is the sky blue?

• What is the effect of water on seed germination?

What is the effect of changing the type of paper on the distance a paper airplane flies?

• The style of the airplane is the independent variable

• The type of paper is the dependent variable

• The distance flown is the independent variable

• The type of paper is the independent variable