Skip to main content
Hypotheses and Models

During this segment, we introduce two Science and Engineering Practices: Generating a Hypothesis and Developing a Model.

Teacher and students discuss possible reasons for the deaths of the fish in the Ogeechee River. Host introduces the Science and Engineering Practice: Generating a Hypothesis and Developing a Model.

Premiere Date: July 10, 2016 | Runtime: 00:05:38

Support Materials


Unit 1B Note Taking Guide & Segment Questions

Science & Engineering Practices

Generating a Hypothesis and Developing a Model

Modeling can begin in the earliest grades, with students’ models progressing from concrete “pictures” and/or physical scale models (e.g., a toy car) to more abstract representations of relevant relationships in later grades, such as a diagram representing forces on a particular object in a system. (NRC Framework, 2012, p. 58)


 constant - also known as the controlled variable, any factor that is kept the same during an experiment. 

hypothesis - a tentative explanation or prediction that can be tested by further investigation. 

manipulated variable - also know as the independent variable, the one factor that changes within an experimental group.

meniscus - the curved surface at the top of the liquid in a tube. 

model - a physical, conceptual, or mathematical representation of a real phenomenon whose purpose is to explain and predict what happens in real life. 

observation - any information gathered using any of your five senses or lab instruments.

qualitative data - measurements that do not include numbers.

quantitative data - measurements that include numbers.

replication - data collected by different teams from samples gathered at the same location. 

responding variable - also known as the dependent variable, the variable that is being measured as a result of the experiment. 

significant figures - a term that represents the precision of a measurement. 

Georgia Standards of Excellence

Request Teacher Toolkit

The Chemistry Matters teacher toolkit provides instructions and answer keys for labs, experiments, and assignments for all 12 units of study. GPB offers the teacher toolkit at no cost to Georgia educators. Complete and submit this form to request the teacher toolkit. You only need to submit this form one time to get materials for all 12 units of study.