Physical Science Unit 3 Day 4

Learning Objective: Students will learn about changes of chemical reactions 

and will hypothesize, analyze, and interpret in writing using technical 

vocabulary (reactants, products, molecules, atoms, changes, cause and effect, law of 

conservation of mass, 

coefficients, pH).

Questions:

1. Whats the difference between a decomposition reaction and a synthesis reaction? (book or brain)
2. What changes occur during a chemical reaction? (brain)

3. When the reaction xMg + yO2  zMgO is balanced, what should the coefficients be? (Hint: x, y, and z represent the coefficients.)
	A. x = 2, y = 1, z = 2 B. x = 0, y = 1, z = 2 C. x = 2, y = 2, z = 1 D. x = 1, y = 1, z = 3 Exit Ticket for Day 4:  What was lab activity about today? (summarize) Why did we do this lab? (explain)