Greenhouse Effect
Website: http://phet.colorado.edu/en/simulation/greenhouse. Click on “Run Now” to run the simulation.
What do the yellow dots moving down represent?________Sunlight
photon__________________
What do the red dots represent?__ _infrared photon__________________ Watch
them carefully. Do they all move
upwards? ______ the red dots are moving
up and down and the yellow dots are just moving downwards. Because the sunlight
would not be returning back to the sky. Why or why not?
Today
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Record the composition of the atmosphere (on the right
side of the screen):
(ppm means “parts per million”)
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Record the temperature on the thermometer:
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1750
Click on “1750” on the
right side of the screen to set the atmosphere to the proportions for that
date. Wait a few minutes for the
temperature to stabilize.
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Record the composition of the atmosphere (on the right
side of the screen):
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Record the temperature on the thermometer:
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Ice Age
Click on “Ice Age” on
the right side of the screen to set the atmosphere to the proportions for
Earth’s last major ice age. Wait a few
minutes for the temperature to stabilize.
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Record the composition of the atmosphere (on the right
side of the screen):
|
Record the temperature on the thermometer:
|
Glass Layers
Click on the “Glass
Layers” tab at the top of the screen. On
the right side of the screen, set the Number of Glass Panes to “1”.
Watch the yellow photons carefully. Do they pass through the glass or are they
blocked? ___pass through___
Watch the red photons carefully. Do they pass through the glass or are they
blocked? _______blocked_________ (Move
the slider at the bottom of the screen to slow down the animation if
necessary.)
Record the temperature on the thermometer: 307K, ____91___ °F.
Your family’s car has been parked outside on a cold but
sunny day. When you get in the car, it
is much warmer than the air outside. Explain
how this can happen. Warmer because the sun is warming it up and the wind is not blowing through it.
Photon Absorption
Click on the “Photon
Absorption” tab at the top of the screen.
A methane molecule sits in the middle of the screen. Use the slider on the left side of the screen
to shoot some infrared photons at the molecule.
Do all the photons pass through the molecule? _____no___________ When a photon gets
absorbed, what happens next? __the
molecule in the middle shakes and a new one is emitted_______ _______ When
a new photon is emitted, is it always sent in the same direction?
__________________no_______________
Use the buttons on the right side of the screen to test
different molecules. Record your
observations in the table below. Write
“yes” if any photons get absorbed; write “no” if no photons get absorbed.
Which gases absorb
photons?
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Infrared Photons
|
Visible Photons
|
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CH4 (methane)
|
yes
|
no
|
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CO2 (carbon dioxide)
|
yes
|
no
|
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H2O (water vapor)
|
yes
|
no
|
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N2 (nitrogen)
|
no
|
no
|
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O2 (oxygen)
|
no
|
no
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Which three gases contribute to the greenhouse effect in our
atmosphere?____CH4 CO2 H2O_______________
Which two gases do NOT contribute to the greenhouse effect? N2 O2
Go through the build a molecule simulation.
http://phet.colorado.edu/en/simulation/build-a-molecule
Make Molecules
Make
each of the molecules than do some research to see what kind of products these
molecules are used in. Draw the pictures of the molecules that you built.
Collect Multiple
Make the
4 molecules and draw a picture of each. Also find the scientific name and
common name for each.
Larger molecules
Make
the following molecules and write what elements were used and how many.
Kit 1: Hypochlorous Acid
Kit 3: hydrogen chloride and
hydrogen fluoride
Kit 7: make bromoamine
Science standards
·
Physical science
·
Nature of science
·
Science inquiry
