Title: Conservation of Matter Standard: 5b

Do Now: • How do you write the chemical formula for water?• How do you write the chemical formula for carbon

dioxide?• How do you think the chemical equation for how water is

produced chemically looks like? ____ + ____ _____

Agenda: Homework:• Do Now Finish Vocab Foldable• Hook, IBE• Active Notes: Conservation of Matter • Brain Pop• Active Practice • Vocab Foldable

Todays Agenda

• Do Now • Chemical Reactions Review• Notes: Conservation of Matter• BrainPop! Conservation of Matter• Conservation of Matter Practice• Vocabulary Focus: Fold-ables!

Quick review of Chemical Reactions• A chemical reaction is when you start with one thing and

you end with something different.• Color change• Formation of a solid called a Precipitate• Formation of a gas• Energy (in the form of heat or light) released• Also: Strong smell produced

HOOK:• What happened to the alcohol on the dollar bill?

• If I were to weigh burn it on a scale and no gas (oxygen) could escape, what do you think the scale would show us in terms of mass?

Investigation Before Explanation: • On your anticipation guide in the before column, mark whether a statement is true or false.

What we are learning about next:

Standard 5b: Students know the idea of atoms explains the conservation of matter: In chemical reactions the number of atoms stays the same no matter how they are arranged, so their total mass stays the same.

Vocabulary Focus: • Chemical Formula- a combination of chemical symbols

and numbers to represent a substance. • Shows which elements are in a substance (Ex NaCl is sodium and

Chlorine, CO2 is 1 carbon atom and 2 oxygen atoms)

• What atoms (and how many) are in H2O? How about CH4 ?

• Chemical Equation- a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products• A chemical reaction shows that the numbers and kinds fo atoms

are the same before and after a reaction. (ex. H2 + O H2O

Quick Check: answer this question in your notes and circle it.

• How is a chemical equation different from a chemical formula?

• Reactant- a substance(s) you start with in a chemical reaction • What you START with

• Product- a substance(s) that forms in a chemical reaction• What you END with

Vocabulary Focus:

Chemical Equations:

A + B C+D

reactant productReactants REACT to produce PRODUCTS

How this looks: Our LAB from Monday/Tuesday

Magnesium + Copper Sulfate Magnesium Sulfate + Copper

OR:

Mg + CuS MgS + Cu

A + B C+D

reactant product

Chemical Equation Number of atoms in the reactants

Number of atoms in the products

Na + Cl NaCl Na=Cl=

Na=Cl=

HCl + NaOH NaCl + H2O

H= Cl= Na= O=

H= Cl= Na= O=

2Sb + 3I2 2SbI3 Sb= I=

Sb= I=

The LAW of Conservation of Matter

states:

•Matter cannot be created or destroyed during a chemical reaction.

•The total mass of the reactant in a chemical reaction is the same as the total mass of the products.

Check this!

How does the mass of reactants in a reaction compare with the mass of the products?

Practice: Directions: In the reactions below, label each thing a “Reactant” or a “Product.”

Mario10 kg_________

+ Magic Star_______kg_____________

Invincible Rainbow Mario 13 kg_________________

BrainPop! Conservation of Matter• Follow along on your notes sheet (the same as with the

Bill Nye video). We will watch it TWICE to make sure you get everything.

Flip over your BrainPop! • Let’s look at the practice on the back…• Reason through it with your partner. You have 15 minutes

to complete the 8 questions.

Using your blank piece of paper:• Watch Ms. Capaldi for directions on how to arrange and

fold them

Vocabulary to know: Your homework is to complete the vocabulary foldables- you may color them however you like, just make sure they have all the terms and definitions, and a picture for each

•Reactant•Product •Conservation of matter

•Chemical equation

•Chemical formula