03P Earths Energy Balance.notebook
January 21, 2017
Factors That Affect Energy Balance
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03P Earths Energy Balance.notebook
January 21, 2017
Solar energy is absorbed or reflected when it reaches Earth
from the sun. Our weather and climate are directly effected
by the solar energy that reaches Earth.
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03P Earths Energy Balance.notebook
January 21, 2017
Earth Heats Up and Cools Down
Day Time
Night Time
the Earth is always gaining energy from the Sun and losing
energy into space
if Earth gains more energy than it loses Earth will warm
if Earth loses more energy than it gains Earth will cool
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03P Earths Energy Balance.notebook
January 21, 2017
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03P Earths Energy Balance.notebook
January 21, 2017
Explain
Observe
Explain
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03P Earths Energy Balance.notebook
January 21, 2017
Observa'ons
Table 1: Change in Soil Temperature Under 60W Lamp
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03P Earths Energy Balance.notebook
January 21, 2017
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03P Earths Energy Balance.notebook
January 21, 2017
How Much Energy Earth Reflects? (Albedo)
> albedo is the por'on of the solar energy that is
reflected by a surface
> increasing Earth's albedo = cooler average
temperature
(e.g. Clouds reflect solar energy and have an average
albedo of 40 % to 70 %)
> decreasing Earth's albedo = warmer average
temperatures
(e.g. forests do not reflect much energy and have an
average albedo of 10 % to 20 %)
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03P Earths Energy Balance.notebook
January 21, 2017
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03P Earths Energy Balance.notebook
January 21, 2017
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03P Earths Energy Balance.notebook
January 21, 2017
How does the type of surface affect albedo?
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03P Earths Energy Balance.notebook
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03P Earths Energy Balance.notebook
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03P Earths Energy Balance.notebook
January 21, 2017
Table 1: Temperature Changes for Two Surfaces When
Heated
time (min)
surface 1
temp. ( C)
surface 2
temp. ( C)
0
1
2
3
4
5
6
7
8
9
10
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03P Earths Energy Balance.notebook
January 21, 2017
1. Plot a graph of the recorded temperatures.
2. Which type of surface resulted in the higher
temperature?
3. Which type of surface had the higher albedo?
Explain.
4. Which surfaces on Earth might have the highest
albedo? which the lowest?
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03P Earths Energy Balance.notebook
January 21, 2017
Answer page 317 #1, 2, 3, 5
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03P Earths Energy Balance.notebook
January 21, 2017
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