9th Grade Unit 4

What is the Law of Conservation of Matter?

• Matter is all around us 
• Matter is a substance that can transform into new things making more matter and destroying everything around us 
• Matter cannot be destroyed or created
• Matter can be created and destroyed

Which is an example of a balanced chemical equation?

• Cl+C=Cl₂C₅
• N₂ + H₂ = NH₄
• Na+C₃+H₆+O₉+Z₂₁= Na+3CH₂O₃Z₇

How is the Law of Conservation of Matter demostrated in this equation?
CH4 + 4CL2 = CCl4 + 4HCl

• At the end everything is not equal 
• At the begining everything is equal 
• In the end everything is not equal 
• In the end everything is equal 

What is an Exothermic Reaction?

• A reaction accompanied by an absorbation of heat 
• did we learn this?
• A reaction accompanied by a release of heat 
• A reaction involving the release and absorbation of heat 

Did you know that oxygen went for a second date with potassium? 
How did it go? 

• It went OK
• They lived happily ever after 
• It went OK2
• Things didn't go so well 

What is Synthesis? 

• wHAT 
• A compund breaking down 
• 2/More elements combining to form a more complex product 
• 1 element making 1 element 

What does the Subscript represent?

• How much a thing is multiplied by 
• The number of atoms in a molecule 
• Number written below the line 
• It's a number 

What is the definition of a Chemical Equation?

• Symbolic representation of how much I care 
• Symbolic representation of a chemical reaction 
• Symbolic representation of a chemical property 
• Symbolic representation chemical 

What is a Chemical Reaction?

• Change in the physical property of an element 
• When a substance gets new lipstick 
• When a chemical laughs 
• Change in the makeup of a substance 

What is Decomposition?

• When an organism dies and is broken down 
• A compound broken into smaller elements
• A compound is made into another compound 
• do i have to know this????????