Do Now Pick Up You binder Pick up your book Flip to Chapter 6, Activity 1 Take out your data table from yesterday.

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Presentation transcript:

Do Now Pick Up You binder Pick up your book Flip to Chapter 6, Activity 1 Take out your data table from yesterday

Do Now: 11/18/09 1) What do you need for a reaction to take place? 2) What can happen when you combine two substances together in a reaction? Think back to your lab yesterday….

Physical vs. Chemical Changes

What’s the Difference? Matter can change Examples: Freeze, cut, burn, etc. 2 types of changes 1. Physical changes 2. Chemical changes

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Physical Changes Matter changes form WITHOUT becoming something new – You start and end with same thing (see below) Examples: cutting, freezing, melting, etc.

Molecules in Physical Changes

Chemical Changes Matter changes, becomes NEW substance – Start and end with different things Usually irreversible (can’t change back) Examples: burning, rusting, milk going sour

Molecules in Chemical Changes The atoms arrange to make a new substance

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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? 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!

Physical Change v. Chemical Change Make a Venn Diagram to compare the 2 types of changes