Cornell Notes-Practice!Cornell Notes-Practice!Preparation for life beyond HIGH SCHOOL!Preparation for life beyond HIGH SCHOOL!

Key Points for Key Points for “BIOCHEMISTRY NOTES” “BIOCHEMISTRY NOTES” (LEFT SIDE OF PAPER):(LEFT SIDE OF PAPER):

-What are 3 parts of an -What are 3 parts of an atom?atom?

-What do organic molecules -What do organic molecules contain?contain?

-What are 2 substances that -What are 2 substances that are inorganic?are inorganic?

-What are the “levels of -What are the “levels of organization?”organization?”

Atom- the smallest unit of an element that retains the chemical properties of that element

Atoms

Atoms

• Made of 3 parts protons, neutrons, electrons

Protons = positive charge (+)+

Neutrons = no charge

Electrons = negative charge (-)

++++

Organic Compounds

Organic = contains carbon (made of carbon)

*All living things are organic because they contain carbon!

X X

Organic Compounds

Organic = contains carbon (made of carbon)

2 Types of Molecules:Elements and Compounds

Compound- made of two or more different kinds of atoms

Element- made of only one kind of atom

OxygenO2

WaterH2O

• Oxygen • Carbon • Hydrogen • Nitrogen • Phosphorus

5 Most Common Elements in Living

Things

Levels of OrganizationSmall to Large

Body Systems

Organs

Tissues

Cells

Molecules

Elements

Atoms

Properties of Water Notes Properties of Water Notes 1. Water is POLAR

2. Water molecules are cohesive

3. Water molecules are adhesive

What are the properties of What are the properties of water?water?

1. Water is POLAR

2. Water molecules are cohesive

3. Water molecules are adhesive

4. Density property-Water is more dense as liquid than as a solid.

5. Water is a universal solvent.

Why is water considered “polar”?Why is water considered “polar”?

1. Water is POLAR

Hydrogen has a positive charge.

Oxygen has a negative charge.

What is cohesion? What is cohesion? 2. Water molecules are cohesive

(they stick to each other!)

What is cohesion? What is cohesion? 2. Water molecules are cohesive

(they stick to each other!)

HYDROGEN BOND!

Cohesion leads to surface tension

What is adhesion?What is adhesion?Properties of Water

3. Water is ADHESIVE (attracted to other types of molecules)

Tape is adhesive… it sticks to stuff!

The water molecules are like little magnets. They will be attracted to other molecules like soap, sugar, salt etc!

What property of water is shown What property of water is shown here? here?

What is special about water’s What is special about water’s density?density?

Water is less dense as a solid than a liquid. Water is less dense as a solid than a liquid. What does this mean? What do you already What does this mean? What do you already

know about density?know about density?     

Solid

    

Liquid

    

Gas

Use the diagram to fill in molecules for a solid, liquid and gas. How would you

arrange the “dots” (molecules)?

Just think…. Just think…. Inside one drop Inside one drop of water is many of water is many tiny water tiny water molecules made molecules made up of…up of…

Hydrogen (+) Hydrogen (+) and Oxygen (-)!and Oxygen (-)!

What is special about water’s What is special about water’s density?density?

This is the normal molecule structure for solid, This is the normal molecule structure for solid, liquid and gas:liquid and gas:

What is special about water’s What is special about water’s density?density?

Ice is less dense as a solid so it floats!Ice is less dense as a solid so it floats!

Review… What are the properties Review… What are the properties of Waterof Water

1. Water is POLAR

2. Water molecules are cohesive

3. Water molecules are adhesive

Because of these properties, water is considered the UNIVERSAL SOLVENT! (water can dissolve almost anything!)