Title: E'T' 225 Draw the following beach, water, and sun in the notes section of your science notebook
1E.T. 2/25Draw the following (beach, water, and
sun) in the notes section of your science
notebook
2THE STORY OF MR. SEABREEZEWhy we have weather
- Imagine yourself at the beach during the day and
then at sunset -- what, if any, differences are
there?
3Radiation
- The ground and water are heated by the sun
through radiation (electromagnetic waves
primarily in the infrared, visible, and
ultraviolet portion of the electromagnetic
spectrum). - Add radiation to your picture.
4Think about the following questions do not
answer out loud but be prepared to give an answer
if called upon
- On a sunny summer day at the beach which is
warmer, the ocean water or the sand? - At night at the beach, after the sun has gone
down, which is warmer, the ocean water or the
sand? - .
5Specific Heat and Heat Capacity
- Specific heat is the measure of the heat energy
required to raise the temperature of a given
amount of a substance by one degree. - Differential heating -- this is why we have
weather! - Sand heats up faster and cools down faster than
water with radiation from the sun (add this to
the picture in your notebook) - Water has a higher specific heat than sand
6Conduction
- The air touching the sand is heated by
conduction, which is when energy is transferred
by molecules slamming into one another. - Add conduction to your drawing
7Think about the following questions do not
answer out loud but be prepared to give an answer
if called upon
- What happens when the burners are lit on a hot
air balloon? - What happens when the burners turn off?
8- The same principle is true of hot or cold air in
the atmosphere - -Warm air rises
- - Cold air sinks
9Convection
- As the warm air over the land warms up, it begins
to rise. As the warm air rises, the cooler air
from over the water flows in to take its place. - This movement of air is convection, or molecules
moving from one place to another. - Add convection to your beach drawing
10- http//www.classzone.com/books/earth_science/terc/
content/visualizations/es1903/es1903page01.cfm?cha
pter_novisualization
11(No Transcript)
12Sea Breeze
13- The body of air over Olympia is low pressure but
the air in Seattle is high pressure. - Which way is the wind blowing?
- 1) Seattle to Olympia
- 2) Olympia to Seattle
14Homework -- on separate sheet of notebook paper
to turn in.
- Write several meaningful haikus or one long poem
using the following terms with their relation to
the formation of wind specific heat, conduction,
convection, air pressure, electromagnetic
radiation, wind.
15Entry Task 2/11/09Discuss with classmates
- How does an airplane wing work in terms of air
pressure?
16- When it is cold and you exhale, why do you see
your breath? Why does this not happen when it is
warmer?
17(No Transcript)
18About how much water vapor can the air hold if it
is zero degrees outside? What if it is 40 degrees?
19Dew point
- Why does dew form on the ground?
20Dew point
- Why does dew form on the ground?
21Just Dew It! -- LAB
- In lab groups of two or three people, perform
this lab. - MAKE DATA TABLE AND ANSWER QUESTIONS ON YOUR OWN
SHEET OF PAPER. DO NOT WRITE ON THE CLASS SET OF
LABS.
22Discussion of Questions
23Entry Task
- What conditions are necessary for clouds to form?
24Cloud in a bottle LAB (put this title in
textbook)
- Investigative question What conditions are
necessary for clouds to form? - Hyposthesis (if, then, because)
25- Make data table to record observations of three
trials.
26Cloud in a bottle LAB (put this title in
textbook)
- PART A
- Fill jar 1/3 full of warm water
- Fill metal can with ice and place on top of jar
- Shine flashlight through empty space in jar
- Make observations of what is happening in your
textbook
27- PART B
- Fill jar 1/3 full of warm water
- Strike match and drop into water
- Immediately put ice (in metal can) on top of
bottle - Make observations of what is happening in your
textbook while shining flashlight through empty
space in jar
28Questions to answer in textbook
- What is another condition, besides moisture and
cool air, necessary for cloud formation? - In nature how does moisture get into the
atmosphere? - Once in the atmosphere, why would water vapor
cool? - What in nature would act as the smoke that was
used in lab?
29Cloud formation(take notes in textbook after
lab)
- Evaporation water molecules absorb thermal
energy from the sun. High energy molecules leave
as gas. - Gases are warmed by radiation from sun, and they
expand, rise, and cool. - Condensation The warm water vapor rises until it
cools to the point where it condenses around
condensation nuclei in the atmosphere.
30So........
- The amount of energy in the system is conserved
- the energy absorbed by the molecules during
evaporation is equal to the amount of energy
released during condensation.
31Evaporative cooling
32- http//www.colorado.edu/physics/2000/bec/evap_cool
.html
33What is temperature measuring?
- Definition of temperature The average kinetic
energy of molecules in a substance
34Make an analogy and write it down
- Your job is to make an analogy for the process of
evaporative cooling.
35- Example analogy The really good college
basketball players sometimes leave to go to the
NBA, leaving the college basketball pool of
players less talented. - The good players are like high energy molecules,
and the NBA would be like a cloud of gas. The
pool of college basketball players are like a
body of liquid which is left with lower energy
molecules, and so the average kinetic energy is
lower.