Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Physical and Chemical Changes

No description
by

Jennifer Campbell

on 2 October 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Physical and Chemical Changes

Physical and Chemical Changes
Can I determine whether a physical or chemical change occurred?
SPI 0807.9.8

A physical change is a change in size, shape, form, weight, and other physical properties.

(the identity doesn’t change)
Example:
Imagine a piece of silver that has been pounded and molded into a ring.
The
shape
of the silver is the only thing that changed.
Its properties are still the same!
The piece of silver is
still
silver.

Physical changes
DO NOT
change the identity of the matter involved.
What do you think??
Melting Ice
Cutting Hair
Chipping Wood
Mixing Sugar
and Water
More
Examples....

- Mixing oil and vinegar
- Tearing aluminum foil
- Molding Clay
- Breaking glass

What is a CHEMICAL CHANGE?
A chemical change occurs when
one or more substances
are changed into
new substances with different properties
.

Examples
of Chemical Changes
Baking a Cake
Digestion
Chemical changes change the
identity
of the matter involved.
An important question to ask yourself when trying to decide if a physical or chemical change happened is:

DID ANYTHING
NEW
FORM???
CLUES to a Chemical Change
You usually need
2 or more
of these characteristics to be considered a chemical change!
Example: Alka Seltzer
Color Change
Fizzing and
Foaming
If fizzing or foaming occurs, this means that a
gas
has been produced.
Formation of a
New
Substance
\

* Test tube bleach demonstration
Precipitate Experiment
Smell
Heat and/or Light
Yeast and Peroxide Demonstration
Burning something
Physical changes are
REVERSIBLE
Chemical changes
CANNOT
be undone.
To leave class...
1. A ____________ change occurs when one or more substances are changed into a new substance with different properties.
2. Which of the following is a PHYSICAL change? EXPLAIN WHY.

a. Rust forming
b. Tearing aluminum foil
Give one example of a chemical change and explain how you know it is a chemical change.
Choose any
two
words from the word wall and
articulate
the meaning of each..
Rust Forming
Examples of Physical Changes...
Rotting Apple
RUST
Broken Glass
Mowing Grass
Cereal turns soggy
Ripening Tomato
Fireworks exploding
Decomposing flowers
Cooked Egg
Photosynthesis
Leaves changing color in the fall
Evaporation
Melting Wax
Burning Candle
Freezing Food
Sublimating Dry Ice
Formation of copper into wire
Making Pancakes
Cloud forming in the sky
Tarnishing silver
Lighting a match
Rusting Nail
Roasting a Marshmallow
Deflating a basketball
Crumpling of paper
Inflating a Volleyball
Chewing Food
Popping Popcorn
Cracked Egg
Dissolving Sugar in Water
Full transcript