BUBBLE, POP, & FIZZ

What happens when things mix?

What do things look like when they change? How does the smell change? The feel, taste, sound?

These are natural questions for young children!

All we are doing is giving children room to discover those changes, and the vocabulary to frame them.

DIFFERENT CHANGES

• Physical change
• Change of state
• Chemical change

Physical change - in a physical change, something might alter, but the chemical composition is the same.

Paper can be folded, crumpled, or torn.

But it is still paper!

Physical changes are the ones children notice most.

Solutions and mixtures are physical changes.

In a mixture, items can be sorted and separated again.

In a solution, a solute is dissolved in a solvent. Kool Aid is dissolved in water.

Viscosity is a measure of a liquid's thickness, stretchiness, and how it resists changing shape.

A bubble is a thin membrane filled with gas.

Bubble SOLUTION must be thicker, or more viscous, than water, but not so viscous that it resists change.

A bubble membrane's surface tension is uniform, so it is ALWAYS spherical, unless restricted.

Change of state - a substance changes from one state of matter to another.

STATES OF MATTER

• Solid-molecules tightly compressed
• Liquid-molecules separated and moving
• Gas-molecules are excited and much further apart

Chemical change - a reaction happens, and substances are altered chemically.

When you burn paper, it chemically changes

Take a look at your pacing guide for Week 3-4.

OTHER EXPERIMENTS:

• Mentos & Diet Coke
• Alka Seltzer rockets