Physical and Chemical Changes in Science Class
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:
Name
Period ____ 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
density
texture
(
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.
Explore the concepts of physical changes and chemical reactions in this interactive science lesson. Students will differentiate between the two types of changes, identify evidence for each, categorize examples, and discuss key concepts with their peers at the table. Through videos and discussions, they will learn about the behavior of molecules in physical and chemical changes, recognize signs of chemical changes, and use the AGAPE method to identify chemical reactions. Engaging activities and discussions will deepen students' understanding of these fundamental scientific concepts.
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Presentation Transcript
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: Name Period ____ 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 density texture (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.
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. *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.
