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Welcome Back! Today we will:. Check your books and binders. Talk about this semester’s plan. Talk about your study skills and…. Our NEW homework policy. You must finish all your homework before t he Friday before any exam or…. YOU DON’T WRITE THE EXAM!.

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Welcome back today we will
Welcome Back! Today we will:

Check your books and binders

Talk about this semester’s plan

Talk about your study skills and…


Our new homework policy
Our NEW homework policy

You must finish all your homework before

the Friday before any exam or…





My office hours
My office hours:

Everyday: 7am – 7:50am

Everyday: 12:15pm – 12:50pm

If you ask me I can also see you at

17:00 – but you have to ask.





How to study
How to study? bucket)!!

Review AND UNDERSTAND every lesson

(5 – 10 minutes)

Before tests study is small groups

Come see me in my office!



1. Explain what happened to the bike lock. bucket)!!2. Why do the lanterns fly?3. Why can we see steam when we eat hot Xiao long bao?


Bike Lock? bucket)!!- cold, particles move slower, hard to change shape, “hard solid”- warm, particles move faster, easy to change shape, “soft solid”


Lanterns? bucket)!!- fire inside makes particles move faster, farther- particles outside are slower, closer- outside air is more dense than air inside lantern- lantern floats up


XLB? bucket)!!- XLB has water inside- the XLB is hot- water’s particles move faster and farther- water evaporates to steam- we see steam


Chemistry is the study of changes of matter: bucket)!!Matter is anything that has mass or volume.Mass is the amount of stuff in something.Volume is the amount of space something needs.


Chemistry bucket)!!is the study of changes of matter:Matter is anything that has mass or volume.Mass is the amount of stuff in something.Volume is the amount of space something needs.


Chemistry is the study of changes of matter
Chemistry bucket)!!is the study of changes of matter:


Matter bucket)!! is anything that has mass or volume.Mass is the amount of stuff in something.Volume is the amount of space something needs.


Matter stuff
Matter = Stuff bucket)!!

Apples are matter, so are

cats, air particles and

people.

Matter is everything


Matter stuff1
Matter = Stuff bucket)!!

Apples are matter, so are

cats, air particles and

people.

Matter is everything


Mass how much stuff is in something
Mass = How much “stuff” is in something. bucket)!!

It is NOT how heavy something is. Why?

Because mass does not change on

other planets,

but things can be heavier of lighter

on other planets.


Mass how much stuff is in something1
Mass bucket)!! = How much “stuff” is in something.

It is NOT how heavy something is. Why?

Because mass is the same on

other planets,

but things can be heavier of lighter

on other planets with different gravity.



Volume how much space something needs1
Volume bucket)!!: How much space something needs.


Some things can have the same volume but different mass. For example: this cup with water and this cup without water


Some things For example: this cup with water and this cup without water can have the same volume but different mass. For example: this cupwith water and this cup without water


Mass is the amount of stuff in something
Mass is the amount of “stuff” in something. For example: this cup with water and this cup without water


Mass is the how much stuff in something
Mass For example: this cup with water and this cup without water is the how much “stuff” in something.


Volume is how big something is or how much space something needs
Volume For example: this cup with water and this cup without water is how big something is orhow much space something needs.


Which one has more volume which one has more mass
Which one has more volume? For example: this cup with water and this cup without waterWhich one has more mass?


Thinking: For example, please think of 2 things (1 pair) that have the same (or almost the same) volume but not the same mass.




Solid
Solid matter in it?


Liquid
Liquid matter in it?


Gas matter in it?


The particle theory of matter
The particle theory of matter. matter in it?

All matter is made of very small

particles

There are spaces between the

particles (different states have more or

less space)


The particle theory of matter1
The matter in it?particle theory of matter.

All matter is made of very small

particles

There are spaces between the

particles (different states have more or

less space)


Small particles
Small particles: matter in it?


How small are particles one small drop of water has 1000000000000000000000 particles in it
How small are particles? matter in it?One small drop of water has 1000000000000000000000 particles in it.



Spaces are more in gas less in solids1
Spaces matter in it? are more in gas, less in solids.


3 the particles are always moving
3. The particles are matter in it?always moving.

4. Particles like to “go together”


Particles move fast and far in gases. Particles move slower and closer in liquids. Particles “shake” in solids.


Particles move and closer in liquids. Particles “shake” in solids.fast and far in gases. Particles move slower and closer in liquids. Particles “shake” in solids.


Look at these two reactions how are they different
Look at these two reactions and closer in liquids. Particles “shake” in solids.反应. How are they different?


Physical vs chemical change
Physical vs. Chemical change and closer in liquids. Particles “shake” in solids.

The physical change there is no new

substance (物质), just frozen water and

common water.

The chemical change there is a new

substance. It is CO2.


Physical vs chemical change1
Physical vs. Chemical change and closer in liquids. Particles “shake” in solids.

The physical change there is no new

substance (物质), just frozen water and

common water.

The chemical change there is a new

substance. It is CO2.


Examples
Examples? and closer in liquids. Particles “shake” in solids.


Physical properties
Physical Properties and closer in liquids. Particles “shake” in solids.

Physical properties are ways to describe

a substance (物质). For example, its

colour or state (solid, liquid or gas).


Physical properties1
Physical Properties and closer in liquids. Particles “shake” in solids.

Physical properties are ways to describe

a substance (物质). For example, its

colour or state (solid, liquid or gas).


What are the properties of
What are the properties of… and closer in liquids. Particles “shake” in solids.


There are two ways to measure physical properties qualitative and quantitative
There are two ways to measure physical properties: qualitative and quantitative.

Qualitative properties we can see

but we can’t measure.

Quantitative properties was can see

and measure (with numbers)


There are two ways to measure physical properties qualitative and quantitative1
There are qualitative and quantitative.two ways to measure physical properties: qualitative and quantitative.

Qualitative properties we can see

but we can’t measure.

Quantitative properties we can see

and measure (with numbers)


Qualitative properties state colour magnetism malleability
Qualitative Properties: qualitative and quantitative.- State- Colour- Magnetism (磁) - Malleability (可塑性)


Quantitative properties density freezing melting point b oiling point kaishuidedian solubility
Quantitative Properties qualitative and quantitative.- Density- Freezing/melting point- Boiling point (kaishuidedian)- Solubility (可溶性)




Elements
Elements qualitative and quantitative.

An element is a pure substance that

can’t be made into smaller parts.

Au

O


Compound
Compound qualitative and quantitative.

A pure substance made from more than

one element.

Water is hydrogen

(H) and oxygen (O):

H2O.


Solutions and reactions
Solutions and Reactions qualitative and quantitative.

Solutions and reactions are not pure

substances.


Solutions or reactions
Solutions or Reactions qualitative and quantitative.

If we put two (or more) elements or

compounds together sometimes they just sit together, that is a “Solution”.


Solution or reaction
Solution or Reaction qualitative and quantitative.

If we put two (or more) elements or

compounds together sometimes they

make a chemical reaction.


Pure substances
Pure Substances qualitative and quantitative.

Pure substances are made from only

one kind of matter (thing).

There are two kinds of pure substances:

Elements and Compounds


Pure substances1
Pure Substances qualitative and quantitative.

Pure substances are made from only

one kind of matter.

There are two kinds of pure substances:

Elements and Compounds


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