Unit 1 - DCI Introduction to Matter

DCI Classification of Matter Split into groups of 4 or 5 Turn to page 1 in the Activities Manual (During Class Inventions) Do the activity.

1. Each container (A–T) shows a sample of substance(s) as viewed at the atomic level. Look at the containers and come up with some different ways to categorize the contents. For example, if you feel the contents of a subset of the containers could all be grouped, what would be the basis for the group?

2. Select one or more containers from 1 that represent: a. a chemical change (briefly explain your reasoning for the choice) b. a physical change (briefly explain your reasoning for the choice)

3. Complete the containers below by representing a solid substance in a liquid, before and after it dissolves. Include a brief narrative supporting your diagrams. Is dissolving a physical or chemical change? BeforeAfter

4. Describe the contents of four containers that you have not selected for question 2. Clearly describe the contents of the container such that the description fits that container and no other container.

Clicker Questions

I. From the list below select the Container that depict an element in the gas phase. 1) A 2) B 3) C 4) E 5) F

II. A compound in the gaseous phase 1) B 2) C 3) F 4) M 5) Q

III. A homogeneous mixture in the solid phase 1) E 2) I 3) K 4) N 5) R

IV. A heterogeneous mixture in the liquid phase 1) D 2) I 3) L 4) N 5) Q

V. Which of the following pairs of diagram represents a chemical reaction 1) E --> H 2) S --> E 3) C --> G 4) I --> Q 5) R --> N 6) A