Objectives  Define mass, volume and concentration. Apply concepts related to the measurement of mass, volume and concentration. Solve problems related to mass, volume and concentration.

For Teachers Pre-Test Answer Key Post-Test Answer Key Teacher Procedure For Students Printable Pre-Test Printable Post-Test Student Procedure Student Activity Journal [All tests, keys, & journals are MS Word documents.]

Pre-Test
Multiple-choice items make up the pre-test.
You have been provided copies of the exams to give to the students. You can print more if you desire. Access the answer key (among the resources above) to check your students' answers.

Post-Test
Multiple-choice items make up the post-test.
You have been provided copies of the exams to give to the students. You can print more if you desire. Access the answer key (among the resources above) to check your students' answers.

Lesson Presentation 
This lesson should be the first unit taught in the Water Quality module because it introduces the students to the concepts of mass, volume and concentration, which will aid them throughout their remaining science courses.  The lesson uses tangible examples to demonstrate the differences between mass and weight and to show how volume and concentration can be changed.  For class discussion, the teacher might want to demonstrate blowing up a balloon to show how volume changes.  The teacher may also want to use other interactive examples that we are not able to use via the internet.

Activity
The activity is designed to help students appreciate mass, volume and concentration relationships.  Teachers can demonstrate differences in volume when the students fill up the different containers in the Student Setup section.  Students should appreciate differences in concentration when adding a fixed mass to varying volumes of water.  The students should notice not only quantitative differences in concentration, but they should also gain an appreciation for looking at different solutions and qualitatively assessing the concentrations of the solutions by comparing them.

Software used in the lesson: 
Microsoft WORD 
Microsoft Internet Explorer or Netscape Navigator
Microsoft Windows Media Player

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