- Substances are made from different types of atoms, which combine with one another in various ways. Atoms form molecules that range in size from two to thousands of atoms.
- Each pure substance has characteristic physical properties (for any bulk quantity under given conditions) that can be used to identify it.
- Do Now– Get out your science notebook and open to page 59. Read the Key Question and Problem Statement on page 59. Give one of the members of your cooperative table group a complement in honor of Valentine’s Day!
- Investigation– What is the relationship between volume and density for objects of equal mass? On page 59, set up Key Question, Problem Statement, Hypothesis, and Experimental Design. Read Procedure. Review Table Group Member Responsibilities. Review Science Safety and complete Lab Safety Checklist Before You Begin Questions 1-7. Start lab!