The independent variable, or I.V. is the factor that the scientist changes of purpose. The dependent variable, or D.V. is the factor that changes as a result, often measured. Control variables, also known as constants, is the factor that is kept the same on purpose.
Quantitative-Measurable characteristics, anything that can be measured with something like a ruler, scale, or thermometer. For example, yards, miles, and feet are quantitative data.
Qualitative-Things that can’t be measured by using your senses. For example, color, texture, and smell are qualitative data.
An idea formed from facts and evidence is an inference. An inference that can be tested is a hypothesis
Something that you notice, measure, or detect is an Observation. Using your five senses - which are sight, smell, touch, hear, and taste - you can make an observation.
Results - What happened? Results is the fourth step in the scientific method. Results uses quantitative data and qualitative data.
Experiment - Materials and procedures. Experiment is the third step in the scientific method. It's a series of steps that include I.V, D.V, and controlled variables. To sum it all up, your testing the hypothesis.
Hypothesis - Hypothesis is the next step in the scientific method. A hypothesis as an educated guess.
Problem - What do you want to find out? Problem is the first step in the scientific method. Your problem must be a testable question.