Monday 2/9/2015
Agenda: Heat Transfer
Notes: Heat Transfer (Conduction, Convection
and Radiation)
Activity: Heat Transfer Worksheet
Homework/Classwork
Heat Transfer Worksheet due Tuesday 2/10/2015
for 25 Points
Energy Heat Transfer
 Most of the energy that reaches Earth comes from the sun (solar
energy)
 What happens to the solar energy when it reaches Earth?
◦ First reaches Earth’s atmosphere
 Some gets absorbed by gases, such as ozone (O3) & water vapor (H2O) greenhouse gases
◦ Some gets reflected back to space by
clouds & Earth’s surface
◦ Some gets absorbed by land masses or
oceans
Energy Heat Transfer Processes
• Solar/heat energy gets transferred between Earth’s
surface & atmosphere by
• Conduction
• Convection
• Radiation
Energy Heat Transfer Processes
 Conduction – process by which heat energy is
transmitted through direct contact with neighboring
molecules
◦ Air & water are poor conductors of heat energy
◦ Most conduction occurs at Earth’s surface
Energy Heat Transfer Processes
• Convection – process by which heat energy is
transmitted by transporting groups of molecules
from one place to another
• Can occur in fluids, such as air & water
Energy Heat Transfer
Processes
• Convection –
• Heated molecules move faster & more spread
apart compared to less heated (cooler) molecules
• Warmer air masses are therefore less dense (less
molecules in a space)
• Therefore, warmer air masses rise
• Cooler air masses are more dense (more
molecules in a space), so they fall back toward the
Earth’s surface
Energy Heat Transfer Processes
• Radiation – process by which heat energy is transferred by
electromagnetic waves
• EM Spectrum
Tuesday 2/10/2015
Agenda: Heat Transfer
Review of Heat Transfer
Activity: Heat Transfer Foldable (Notebook
Check)
Homework/Classwork
Heat Transfer Foldable due Wednesday/Thursday
2/11-2/12/2015 for 30 Points
Heat Transfer Foldable Activity
• You will be making a foldable modeling the three type s of heat
transfer: convection, conduction and radiation
• The pictures on the front of the foldable have to be associated
with the type of heat transfer
• Your foldable needs to include “real world examples” for each
type of transfer
• Foldable needs to be organized, neat and colored for credit!!
• This will count as an assignment in your next NOTEBOOK CHECK!
Wednesday/Thursday 2/11-2/12/2015
Agenda: Heat Transfer
Notes: The Atmosphere
Activity: Layers of the Atmosphere Packet and
Graphing Activity
Homework/Classwork
Layers of the Atmosphere Reading and Chart
due Friday for 25 Points
What is the Atmosphere?
 Atmosphere – Very
thin envelope of gases
that surrounds Earth
◦ Used by living
organisms for
chemical
compounds/nutrient
s (I.e., O2, CO2, H2O,
N2)
◦ Has no outer
boundary, just fades
into space
Past & Present Composition of
Earth’s Atmosphere
The composition of the Earth’s atmosphere has
changed since the formation of the Earth.
Earth has had approximately 3 different
atmospheres over the course of 4 billion years.
Earth’s First Atmosphere
The Earth’s first atmosphere was
mainly helium (He) & hydrogen (H).
Past & Present Composition of Earth’s Atmosp
Earth’s Second Atmosphere
Volcanic emissions later added carbon dioxide,
nitrogen, water, sulfur dioxide & other elements.
No free O2 at this time
Large amounts of carbon dioxide (CO2) from
volcanoes caused the Earth’s past climate to be warmer than
today’s.
Without carbon dioxide, no life could be present on Earth.
Ocean formation occurs due to presence of H2O in atmosphere
Past & Present Composition of Earth’s
Atmosphere
Today’s Atmosphere
◦ Nitrogen (N2)- 78%
◦ Oxygen (O2)- 21%
◦ Carbon Dioxide (CO2) 0.03%
◦ Other miscellaneous
gases (I.e., H2O).
Friday 2/13/2015
Agenda: The Atmosphere
Review: Conduction, convection and radiation
Activity: Heat Transfer Reading and Questions
Homework/Classwork
Heat Transfer Reading and Questions due today in
class for 20 Points