Do NowNovember 12, 2012

Complete the statements. Write the statement and the answers!

1. A__________is a heterogenous mixture that never settles.A. CompoundB. SuspensionC. SolutionD. Colloid

2. What is a compound?E. The smallest unit of matterF. A substance that cannot be broken down into simpler substancesG. The mixture of two or more substances in an unfixed proportionH. A substance made from 2 or more simpler sub stances in fixed proportions

3. The best type of graph for showing how something is divided into parts is a A. Bar graphB. Line graphC. ModelD. Circle graph

Vocabulary Exercise

1. Atom2. Acid3. Electric current4. Electrolyte5. Fluid6. frequency

A. The number of complete wave cycles per unit of time

B. A material that flowsC. The flow of charged

particlesD. The smallest particle of an

elementE. A substance whose

aqueous solution conducts electricity

F. A substance that produces hydrogen ions in water solution; a proton donor

Student Objectives• Students will be able to identify the six

common phase changes.• Students will be able to analyze and describe

what happens to a substance’s temperature and a system’s energy during a phase change.

• Students will be able to analyze and describe the arrangement of water molecules change during melting and freezing.

• Students will be able to distinguish how evaporation and boiling are different.

ReadingStrategyVocab/Assessment

• Copy the diagram on page 84. As we read the text, complete the description of energy flow during phase changes.

• Create flash cards for vocabulary on page 84.• Answer questions from Sec. 3.3 assessment