Physical Change
or
Chemical Change
What you will do…
In this lab you will go around the room to
different stations and determine whether a
substance has undergone a physical change or
a chemical change
What’s the difference between a physical and
chemical change…?
Physical Change or Chemical Change…?
Physical
Chemical
No New Matter
New matter is created
Solid-Liquid-Gas
Can’t undo it without a
chemical reaction
Physical Change or Chemical Change…?
Example:
I reach for a bottle of my favorite soda, it slips from my hand and
shatters on the ground. Tear. What has happened to the
glass?
Physical
Change
Physical Change or Chemical Change…?
Station 1, Question1:
After going on vacation for two weeks I come back to find the
cheese in the frig has grown mold. That’s gross, man!!!
Chemical
Change
Physical Change or Chemical Change…?
Station 1, Question 2:
I’m building a tree house for my son in my backyard. I hammer
separate pieces of wood together to make the structure.
Physical
Change
Physical Change or Chemical Change…?
Station 1, Question 3:
In the morning I get up to make breakfast. I like my eggs sunny
side up. I fry an egg on the frying pan…?
Chemical
Change
Physical Change or Chemical Change…?
Station 1, Question 4:
In the afternoons I like to sip lemonade on the porch. I take 1
tablespoon of mix to every 8oz. of water to make my drink.
Physical
Change
Physical Change or Chemical Change…?
Station 2, Question 5:
The grass is sure getting
long. I take the mower out
and cut the grass.
Physical
Change
Physical Change or Chemical Change…?
Station 2, Question 6:
Back in the 1990s I wanted to look like my favorite singer, Madonna.
So I bleached my hair from brown to blond just like her.
Chemical
Change
Physical Change or Chemical Change…?
Station 2, Question 7:
Over a Bunsen burner two clear
substances are combined in a
graduated cylinder. Immediately the
substances change s color and a gas is
emitted.
Chemical
Change
Physical Change or Chemical Change…?
Station 2, Question 8:
I’m running low on gas. I pull into
Sheets, fill’er up, and get back on
the road. What change has
occurred when the gasoline is
burned as the truck’s fuel?
Chemical
Change
Physical Change or Chemical Change…?
Station 3, Question 9:
It was rather rainy last night.
When the clouds broke this
morning the sun hit the wet
pavement and within twenty
minutes the sidewalks were dry.
What happened to the water?
Physical
Change
Physical Change or Chemical Change…?
Station 3, Question 10:
After years of releasing pollutants into the sky, acid rain has
taken a toll on one of my favorite statues in the park.
Chemical
Change
Physical Change or Chemical Change…?
Station 3, Question 11:
The 4th of July is one of my favorite holidays. I love the firework
displays in the night’s sky. What change do the fireworks
undergo?
Chemical
Change
Physical Change or Chemical Change…?
Station 3, Question 12:
When I was younger my grandmother took me to the railroad
tracks for fun. We would place pennies on the tracks and wait
for the train to come through and run them over.
Physical
Change
Physical Change or Chemical Change…?
Station 4, Question 13:
I was goofing off while riding my bicycle. I fell and got a booboo. To be safe, I poured a little bit of hydrogen peroxide on
the cut.
Chemical
Change
Physical Change or Chemical Change…?
Station 3, Question 14:
I’m a big fan of Mexican food, its my favorite. But a bit too much
spice leaves my tummy hurting. To remedy my stomach pain I
take an antacid. What change is happening in my stomach?
Chemical
Change
Physical Change or Chemical Change…?
Station 4, Question 15:
Germs are everywhere; I’m
constantly applying hand
sanitizer to combat them! I
know the alcohol can kill
harmful bacteria, but where
does the alcohol go after I rub
my hands together?
Physical
Change
Physical Change or Chemical Change…?
Station 4, Question 16:
Wow, thanks mom and dad. I really appreciate the fancy
silverware passed down through our family. However, every
once in awhile I have to polish it so it does not tarnish.
Chemical
Change
SUMMARY:
Physical Changes v.
Chemical Changes
Physical
All about Energy forcing
changes in state
Chemical
Molecular change
Matter cannot be undone
What is present at the
beginning is NOT
present in the end