Physical and Chemical Changes

Matter is... everywhere. anything that takes up space and

has mass. constantly experiencing both

chemical and physical changes.

Physical Change

Physical changes occur when

matter changes its property,

but not its chemical nature.

Physical property changes could include a change in:

volume mass weight density

texture shape size color odor

Physical Change

Chemical Change

Chemical changes are changes that matter

undergo when it becomes new or different matter.

To identify a chemical change

look for signs such as:

color change bubbling and fizzing light production smoke presence of heat

Chemical Change Example: A chemical change occurs

when fireworks are used. Fireworks are made of

metals such as magnesium and copper.

These change chemically as they light up the sky.

Is it a chemical or physical change?

Sugar dissolving in tea

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

Logs burning

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change? Breaking water up by separating

it into hydrogen and oxygen

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

Cutting paper

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

Crushing an aspirin

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

Metal rusting

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

Lighter fluid burining

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

An egg rotting

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Is it a chemical or physical change?

An egg breaking

•Chemical Change

•Physical Change

OOPS!Did it change size, color, shape (Physical

Change)?or

Did it become different matter (Chemical Change)?

Correct!

Activity Time!!!

PURPOSE: To figure out what type of

change is happening: physical or chemical?

MATERIALS:

2 tablespoons baking soda  ¼ cup vinegar 1 balloon 1 bottle funnel

HYPOTHESIS: If baking soda and vinegar and combined in a container sealed by a balloon, then

____________________________________________________________________________________

_______________________________.

**Your team will decide together what to write

PROCEDURE: 1.Pour vinegar into the graduated cylinder. 2.Stretch open the balloon mouth and using your notecard funnel carefully pour the 2 tablespoons of baking soda into the balloon

3.Carefully stretch the balloon mouth over the bottle. Make sure the balloon mouth is tightly around the neck of the bottle.

4.Hold the balloon to the side so that the baking soda does not fall into the vinegar.

5.Now, be ready to watch! Shake the balloon carefully so that it stays attached to the bottle, but so that the baking soda falls into the bottle.

OBSERVATIONS: Draw a picture of

observations of what happened to the balloon after the substances were mixed together.

LABEL YOUR DRAWING.

CONCLUSION: What kind of change(s) took

place? How do you know?