Experimental Design

Science is too important to allow society to have influence. 

• True
• False

Tags

NGSS.HS-ETS1-1

If a theory is widely accepted, it becomes a law.

• True
• False

Theories are subject to change, but laws are not.

• True
• False

Which of these represents a direct relationship?

• XY = k
• X + Y = k 
• X - Y = k
• X / Y = k

Which of these represents an indirect relationship?

• XY = k
• X + Y = k 
• X - Y = k
• X / Y = k

Gravity is a phenomenon that can be expressed as a mathematical equation. Is this expression a law or a theory?

• Law
• Theory

Tags

NGSS.HS-PS2-4

Is the observation that pressure decreases when volume increases part of a theory or a law? 

• Law
• Theory

What is the main reason a control is used in an experiment?

• Reliability
• Accuracy
• Comparison
• Consistency

The dependent variable is shown on the x-axis.

• True
• False

Why do we design experiments so that some variables do not change? Why are they held constant?

• It makes the experiment easier to run.
• They could affect the outcome and are not being tested.