Good afternoon! Please cut out the “electron density model” of water I handed you and add it to...

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Good afternoon! • Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. • Alternatively, you may draw it.

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Transcript of Good afternoon! Please cut out the “electron density model” of water I handed you and add it to...

Page 1: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Good afternoon!

• Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook.

• Alternatively, you may draw it.

Page 2: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Now, in your notebook…

• Is this an atom or a molecule? Explain.

• What is holding the hydrogen atoms to the oxygen atom?

• Describe why this hydrogen and oxygen atoms are connected.

Page 3: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

• Shading = relative density of electrons.

• Describe the electron density in a water molecule.

Page 4: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 5: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Covalent Bonds

• Share electrons• “complete” one

another• Strong – hard to break

Page 6: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

But…all is not equal

• Unequal electronegativity– Ability to attract

electrons

• Do not share electrons equally

Page 7: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 8: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

SO WHAT?

Page 9: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Polar Covalent Bonds

• Unequal sharing of electrons

• Creates oppositely charged poles

Page 10: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

SO WHAT?

Page 11: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 12: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

3d Water model

• Put several of the water molecules close together. What happens?

• Draw several of the water molecules together – use dotted lines to show their interactions.

Page 13: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Polar Covalent Bonds

• Opposites attract• Like a chemical magnet• Creates hydrogen

bonding

Page 14: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Intermolecular bonds vs Intramoleculer bonds

Page 15: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Reviewing…

• What does it mean to be a polar molecule?

• What do I mean when I say that water is “sticky”?

Page 16: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Cohesion

Page 17: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Jesus Lizard

• http://www.youtube.com/watch?v=Qhsxo7vY8ac

• http://www.youtube.com/watch?feature=fvwp&NR=1&v=45yabrnryXk

http://www.youtube.com/watch?v=Qhsxo7vY8ac
http://www.youtube.com/watch?v=Qhsxo7vY8ac
http://www.youtube.com/watch?feature=fvwp&NR=1&v=45yabrnryXk
http://www.youtube.com/watch?feature=fvwp&NR=1&v=45yabrnryXk
Page 18: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 19: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So what?

Page 20: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So What?

• Adhesion

Page 21: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 22: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

ILLUSTRATE COHESION…EXPLAIN YOUR DRAWING. DO THE SAME FOR ADHESION.

Page 23: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Using the model, make a solid.

• Can you pack the molecules tightly? Explain.• Draw a picture in your notebook.• How does this relate to the density of ice

versus liquid water?

Page 24: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 25: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So What?

• Density

Page 26: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So what?

http://science.nasa.gov/science-news/science-at-nasa/2004/05mar_arctic/

Page 27: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Homework:

• Water is necessary for life…it is a resource…on that note, your task…Find an article about our water resource…you’ll

need it for discussion on “water current events” on Monday. Please make sure that your article is about something that has happened in the past decade.

Please don’t procrastinate…grant

Page 28: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Bellringer (in your notebook)

• How much water is in this graduated cylinder (units = mL)?

• What property/ies of water is causing the phenomena of the meniscus?

Page 29: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Reviewing yesterday…

• Density• Cohesion• Adhesion

Page 30: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Just how strong is a hydrogen bond?

• Demonstration

Page 31: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

The flowers…

Page 32: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Water and Plants

Page 33: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 34: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 35: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

378.1 feet!

Page 36: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Heat capacity

• Ability to hold onto a large amount of heat

• Takes a lot of energy to raise the temperature of water – why?

• Importance to living things?

Page 37: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Water is a liquid over a wide range of temperatures…

Page 38: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 39: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Average daily high: 225oFAverage daily low: -243oF

Page 40: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Phoenix

Atlanta

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Boise, Idaho

Providence, RI

Page 42: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So what’s the big so what?

• Water in the atmosphere helps to moderate climate.– Kept within reasonable limits

Page 43: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Latent heat

• Water gives off a large amount of heat when it changes phases

• Importance to living things?

Page 44: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

HOMEOSTASISMaintaining steady internal

conditions

Page 45: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Universal Solvent

• Can dissolve a lot of different substances – put it into solution…ADHESION

Page 46: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So What?

– Can exchange nutrients– Can exchange waste

Page 47: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So what?

• Death by water intoxication…– caused when sodium levels drop below 135 mmol/L– Healthy kidneys are able to excrete approximately 1

litre– Water intoxication can be prevented if a person's

intake of water does not grossly exceed his or her losses of fluid water (0.26 gallons) per hour

– Any activity or situation that promotes heavy sweating can lead to water intoxication when plain water is consumed to replace lost fluids

Page 48: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

VOCABULARY BREAK

Hydrophilic Hydrophobic

Page 49: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Why did the white bear dissolve in water?

• Because it was polar…

Page 50: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Chemical Reactions

• H2O + CO2 C6H12O6 + O2

Page 51: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So What?

• Participant in chemical reactions– Product of

photosynthesis = oxygen

Page 52: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

So what?

• Medium for chemical reactions…some things only have the right shape in water

Page 53: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.
Page 54: Good afternoon! Please cut out the “electron density model” of water I handed you and add it to the input section of your notebook. Alternatively, you.

Life depends on water…


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Bare-Handed Electronic Voting with Pre-processingamnon/Students/ben.riva.thesis.pdf · Bare-Handed Electronic Voting with Pre ... 5 Bare-Handed Electronic Voting with Pre-processing

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GLIOBLASTOMA MULTIFORME ALTERNATIVELY

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Organizers: University of Tuzla, · (sportandhealth@untz.ba) or, alternatively, handed in at the conference (on a CD, DVD, or USB-stick). Papers will be accepted until 15th of September

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New Brighton Residents Association - Get Involved...Brighton to shake and boogie their afternoon away! Themed swag and goodie will be handed out to the kids. This event is open to

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