vs.

Targets:*Understand the difference between physical changes and chemical reactions.*Tell evidence of physical changes and chemical reactions. *Categorize changes as physical or chemical, and show examples of each.

Get out a pencil and paper. Add a heading:

NamePeriod ____ Table _____Physical & Chemical Change

You’ll be discussing items with your table

and taking a few notes.

As you watch the first video, answer this:

1. a. What do molecules do in a PHYSICAL change?

b. What do molecules do in a CHEMICAL change?

A. What do MOLECULES do in a physical change? B. What do they do in a chemical change?

https://www.youtube.com/watch?v=M8tyjwB42X4

With your table, discuss target #1:

*Understand the difference between

physical changes and chemical reactions.

As you watch the second video, answer this:

2. What are 5 signs that molecules are probably changing and a chemical change is taking place?

A.B.C.D.E.

Signs of a chemical change?

https://www.youtube.com/watch?v=37pir0ej_SE

At your table, make sure each person was able to

list at least 5 signs of chemical change.

Chemical reactions are sometimes so amazing, they may leave your mouth agape! They aren’t always amazing, but AGAPE can help you decide if you are seeing a chemical reaction.

The browning that happens in cooking involves

chemical changes:

Look at your list of signs of

chemical change.

Which are occuring in

caramelization?

With phyiscal change, there is NO CHANGE IN THE MOLECULES

that make the substance, so a new substance is not formed.

but you can see changes in:size/shape

phase densitytexture

(MAY change color)

Are you seeing pysical change or chemical reaction

with these changes?

At your table, talk about the change on your card. Be ready to

tell the class how

you can tell whether it

is a physical or chemical

change.

On your paper, list an example of a physical change, and tell 3+ signs that help

you know it is a physical change.

3. An example of a physical change is _________________. Some signs that this is a physical change are: a. b. c.

On your paper, list an example of a chemical change and give 3+ signs.

4. An example of a chemical change is _______________. Some signs that this is a chemical change are:

a. b. c.

*Understand the difference between physical changes and chemical reactions.*Tell evidence of physical changes and chemical reactions. *Categorize changes as physical or chemical, and show examples of each.

Here are our targets. On the top of your paper, by your name, rate yourself from 1 to 4 on how well you have met them.