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Transcript

Quarter 3 flashcards

These flashcards will help you review the material from quarter 3!

SET #5 DUE: WEDNESDAY, March 20th

Chemical Changes

Changes that result in a __________ type of matter.

DIFFERENT

Atoms _________ to make something NEW

REORGANIZE

Click on the picture that shows a CHEMICAL change:

Water boiling

Cutting Hair

Fruit rotting

Breaking Glass

Fireworks

Ok - let me try again

Nice weather is here and you decide to have a campfire outside!Would wood burning be an example of a physical or chemical change?

Physical

Chemical

Chemical Changes

1. Reactant bond are __________2. Atoms ___________3. _________ bonds are formed

Broken

ReArrange

New

Chemical Equation of burning candle

NOTICE:

Reactants are what you ________with

Products are produced (__________)

start

end with

Click and drag the labels to the correct side of the chemical equation.

REACTANTS

PRODUCTS

CHECK

MOVE ON

REACTANTS

PRODUCTS

SORT THE REACTANTS AND PRODUCTS FROM THE CANDLE CHEMICAL EQUATION

Carbon Dioxide

Methane (wax)

Water

Oxygen

CHECK

MOVE ON

HELP

Conservation of Mass

The total number of atoms (total mass) on the reactants side must ______ the number of atoms on the product side

C

C

B

B

A

A

D

D

+

+

+

ATOMS REARRANGE

+

+

+

There is one "A" atom on the reactant side and one "A" atom on the product side

There is one "B" atom on the reactant side and one "B" atom on the product side

There is one "C" atom on the reactant side and one "C" atom on the product side

There is one "D" atom on the reactant side and one "D" atom on the product side

No atoms are lost just ___________!

EQUAL

Rearranged

C

C

C

C

C

B

B

B

A

A

B

A

YOU TRY!Which of the choices below correctly shows conservation of mass?

1.

D

D

D

D

2.

3.

ATOMS REARRANGE

+

+

+

+

+

ATOMS REARRANGE

+

+

+

+

ATOMS REARRANGE

+

Is this equation balanced? Do the atoms on the reactant side equal the atoms on the product side?

CHECK

1

1

MOVE ON

2

2

3

3

4

4

Click and drag: You won't use all the numbers

6

6

Photosynthesis-Process where _______ make their own __________.

PLANTS

FOOD

Photo

Synthesis

_____________

_____________

LIGHT

PUTTING TOGETHER

Plants convert ________ energy into _______ energy (food!)

LIGHT

Chemical

Photosynthesis takes place in the _____________ of plant cells!

CHLOROPLAST

Photosynthesis is a _____________ reaction, this means the atoms REARRANGE to make something new.

Chemical

REACTANTS

PRODUCTS

Plants take in...

Plants give off/make...

Give it a try! Sort the words

Carbon Dioxide

Water

Glucose (food)

Oxygen

CHECK

MOVE ON

Click and drag the labels to the correct side of the chemical equation.

REACTANTS

PRODUCTS

CHECK

MOVE ON

In class, we will model what each molecule looks like and how the ATOMS 1. break apart2. REARRANGE to make something new

How many of that molecule

= carbon

= oxygen

= hydrogen

I modeled 6CO2By showing 6 carbon dioxide (CO2)molecules. Each molecule has 1 carbon atom and 2 oxygen atoms.

= carbon

= oxygen

= hydrogen

Try to build the WATER molecules using the atoms. I modeled the carbon dioxide for you.

HELP

CHECK

MOVE ON

Glucose is built like a chain - check this out!

= carbon

= oxygen

= hydrogen

Did I do it right? Are there 6 carbon atoms, 12 hydrogen atoms, 6 oxygen atoms?

Try to build the OXYGEN molecules using the atoms:

= carbon

= oxygen

= hydrogen

CHECK

MOVE ON

COUNT!Is this equation balanced?Do the hydrogen atoms on one side of the arrow match the hydrogen atoms on the other side? Carbon atoms? Oxygen atoms?

YES

NO

It takes ___________ to break bondsEnergy is released when bonds are __________

Energy in a Chemical Reaction

energy

formed

Exothermic Reaction

  • Temperature ____________
  • Energy ___________

increases

EXITS

Reactants

Products

Energy enters

A LOT of energy exits (temps increase)

ENDOthermic Reaction

  • Temperature ____________
  • Energy ___________

decreases

ENTERS

Reactants

Products

MORE energy ENters

energy released (temp. decreases)

ENDOthermic

EXOthermic

OR

ENDOthermic

EXOthermic

OR

Yes, it is balanced!