During an investigation the variable that remains unchanged throughout the course of the investigation to ensure validity.Answer 3 Question 1

In experimental research, the dependent variable is _________ by the researcher.Question 12Answera.conditionedb.operationalisedc.measuredd.manipulated

If an experiment is to be useful, only one variable at a time can be manipulated intentionally this is the Blank 1 Question 2 .  If more than one variable is altered (changed), the results of an experiment won't be valid. The effect of the change made can be measured this will be the Blank 2 Question 2

By definition, a valid investigation is one that:aims to answer a scientific questionhas a testable hypothesishas an independent variable and a dependent variabletests its intended hypothesis

In an experiment, the variable is measured, and the variable is manipulated.

Scientists use the scientific method to investigate questions and phenomena. As part of that process, a question is asked, and research is performed on the topic. A hypothesis is then formulated using an if-then statement. To develop a well-constructed hypothesis, a scientist will need to identify the variable, which is the one factor that will be changed. The part of the experiment that will be measured is called the variable. Observations and measurements will be collected during the investigation, which is called . Data will later be analyzed to draw a and communicate findings to the scientific community. The conclusion states if the hypothesis was supported or refuted (not supported).