The document provides guidelines for creating testable questions and a protocol for testing such questions. According to the guidelines, testable questions should use question words like whether, when, where, what, how many, how much, and how often. They should also state the specific issue to be tested and list the specific items involved. Additionally, testable questions should describe the conditions under which the test will be conducted and the criteria that will be used to judge the outcome. The protocol outlines steps for conducting a basic investigation to test a question, including making a prediction, performing tasks under different conditions, recording results, analyzing findings, and identifying limitations.