Science Inquiry PFA Evidence

A variable that stays the same is called....

• control variable

• independent variable

• dependent variable

• responding variable

In a controlled experiment, how many independent variables can be worked with at a time? 

• one
• none
• two or more
• how ever many makes sense.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent

• Independent

• Control

• All of the above

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?

• Type of plant
• Water, apple juice, milk
• Plant growth
• Color of the plant's leaves

A good question and a good hypothesis must be..

• Approved by the National Science Committee

• Based on prior knowledge

• Written in present tense

• Testable & measurable

Your teacher has asked you to explain the difference between quantitative and qualitative observations. Which statement is correct?

• A  Quantitative uses numbers, qualitative uses the senses.
• A  Quantitative uses the senses, qualitative uses numbers.
• A  Quantitative uses measurement, qualitative uses numbers.
• A  Quantitative uses colors, qualitative uses the senses.

What variable in an experiment is the manipulated variable?
For example: keep bread at room temp, and keep another one in the refrigerator- here you are changing the temps on purpose to see what happens. 

• Operational Definition
• Control Variable
• Dependent Variable
• Independent Variable

What variable in an experiment is measured? - it is also called the responding variable.
For example: measuring the amount of mold on bread 

• Dependent variable
• Operational Definition
• Independent Variable
• Control Variable

What are diverse ways that scientists study the natural world and propose explanations based on evidence?

• Scientific Law

• Scientific Theory

• Scientific Method

• Scientific Calculator

What can be defined as:

a possible explanation for a set of observations, or an educated guess that must be "testable."

• Scientific Theory

• Question

• Hypothesis

• Claim