Investigating the Problem

We explore the steps involved in creating and testing a hypothesis and introduce our third Science and Engineering Practice, planning and carrying out an investigation.

Host creates a testable hypothesis and procedure for testing collected samples from the Ogeechee River. Host introduces the Science and Engineering Practice: Planning and carrying out an investigation.

Premiere Date: July 10, 2016 | Runtime: 00:02:27

## Toolkit

Unit 1C Note Taking Guide & Segment Questions

## Science & Engineering Practices

Planning and Carrying Out Investigations

Students should have opportunities to plan and carry out several different kinds of investigations during their K-12 years. At all levels, they should engage in investigations that range from those structured by the teacher—in order to expose an issue or question that they would be unlikely to explore on their own (e.g., measuring specific properties of materials)— to those that emerge from students’ own questions. (NRC Framework, 2012, p. 61)

## Vocabulary

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

SC6Obtain, evaluate, and communicate information about the properties that describe solutions and the nature of acids and bases.

SC6.cUse mathematics and computational thinking to evaluate commercial products in terms of their concentrations (i.e., molarity and percent by mass).

SC6.fUse mathematics and computational thinking to compare, contrast, and evaluate the nature of acids and bases in terms of percent dissociation, hydronium ion concentration, and pH. (Clarification statement: Understanding of the mathematical relationship between negative logarithm of the hydrogen concentration and pH is not expected in this element. Only a conceptual understanding of pH as related to acid/basic conditions is needed.)

## 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.