Flashcards due 3/20

SET #5 DUE: WEDNESDAY, March 20th

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

Quarter 3 flashcards

Fireworks

Breaking Glass

Fruit rotting

Cutting Hair

Water boiling

Click on the picture that shows a CHEMICAL change:

REORGANIZE

Atoms _________ to make something NEW

DIFFERENT

Changes that result in a __________ type of matter.

Chemical Changes

Ok - let me try again

Chemical

Physical

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

New

ReArrange

Broken

1. Reactant bond are __________ 2. Atoms ___________ 3. _________ bonds are formed

Chemical Changes

end with

start

Products are produced (__________)

Reactants are what you ________with

NOTICE:

Chemical Equation of burning candle

MOVE ON

CHECK

PRODUCTS

REACTANTS

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

HELP

MOVE ON

CHECK

Oxygen

Water

Methane (wax)

Carbon Dioxide

SORT THE REACTANTS AND PRODUCTS FROM THE CANDLE CHEMICAL EQUATION

PRODUCTS

REACTANTS

Rearranged

EQUAL

No atoms are lost just ___________!

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

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

ATOMS REARRANGE

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

Conservation of Mass

ATOMS REARRANGE

ATOMS REARRANGE

ATOMS REARRANGE

3.

2.

1.

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

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

MOVE ON

CHECK

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

FOOD

PLANTS

Photosynthesis- Process where _______ make their own __________.

Chemical

LIGHT

Plants convert ________ energy into _______ energy (food!)

PUTTING TOGETHER

LIGHT

_____________

_____________

Synthesis

Photo

CHLOROPLAST

Photosynthesis takes place in the _____________ of plant cells!

MOVE ON

CHECK

Oxygen

Glucose (food)

Water

Carbon Dioxide

Give it a try! Sort the words

Plants give off/make...

Plants take in...

PRODUCTS

REACTANTS

Chemical

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

MOVE ON

CHECK

PRODUCTS

REACTANTS

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

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

= hydrogen

= oxygen

= carbon

How many of that molecule

In class, we will model what each molecule looks like and how the ATOMS 1. break apart 2. REARRANGE to make something new

MOVE ON

CHECK

HELP

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

= hydrogen

= oxygen

= carbon

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

= hydrogen

= oxygen

= carbon

Glucose is built like a chain - check this out!

MOVE ON

CHECK

= hydrogen

= oxygen

= carbon

Try to build the OXYGEN molecules using the atoms:

NO

YES

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?

formed

energy

Energy in a Chemical Reaction

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

A LOT of energy exits (temps increase)

Energy enters

Products

Reactants

EXITS

increases

• Temperature ____________
• Energy ___________

Exothermic Reaction

energy released (temp. decreases)

MORE energy ENters

Products

Reactants

ENTERS

decreases

• Temperature ____________
• Energy ___________

ENDOthermic Reaction

OR

EXOthermic

ENDOthermic

OR

EXOthermic

ENDOthermic

Yes, it is balanced!