Energy Flow through Ecosystems assignment with HHMI
Presentation
•
Science
•
9th - 12th Grade
•
Practice Problem
•
Easy
+4
Standards-aligned
Carissa Hale
Used 2+ times
FREE Resource
4 Slides • 18 Questions
1
assignment with HHMI
By Carissa Hale
2
Open the activity by clicking on the link above or access it through Google Classroom.
These slides will have tips for doing the energy calculations if needed and you'll also answer some of the questions from the activity here to get credit for going through the activity!
3
A separate window will open with these headings across the top: Energy Flow, Solar System, Global, Producer, Food Chain, and Summary.
Watch the opening video, either with headphones or play it silently with the CC in English or follow along with the Transcript button.
Answer the question on
the next slide after
watching the video.
Click "Start Interactive"
4
Open Ended
How does the number and total biomass of organisms at the base of a food web compare with the number and total biomass of organisms at the top? Explain your thoughts on this difference.
5
Multiple Choice
Answer this question after you have answered it in the activity and seen the correct answer.
Guess how much of the Sun's energy makes it to Earth
10%
1%
0.1%
<0.01%
6
Fill in the Blanks
When averaged over the entire Earth and year, only
7
Dropdown
Line 1 represents
Line 2 represents
Line 3 represents
Line 4 represents
Line 5 represents
8
Open Ended
Watch the 33 second video on the page with the heading "Energy Balance" (same page as Question 3 in the activity), then answer this question:
What gases accumulate in the Earth's atmosphere and absorb the irradiated heat from the Earth's surface?
9
Incoming Energy at TOA = Incoming Energy at Surface / % Reaching Surface x 100
Incoming Energy at Surface = Incoming Energy at TOA x % Reaching Surface / 100
% Absorbed/reflected by atmosphere = 100% - % Reaching Surface
% Reaching the Surface = 100% - % Absorbed/reflected by atmosphere
Example for the Gulf of Mexico:
% Reaching the surface = 100 - 59 = 41%
Incoming Energy at TOA = 156/41 x 100 = 380
Formulas for Question 3 in activity
10
Match
Match the energy calculations to the correct ecosystem
Incoming energy at TOA in the Temperate Forest (125/45x100)
Incoming energy at surface in Tropical Rainforest (415x47/100)
Incoming energy at surface in Tropical Savanna (401x56/100)
278
195
225
278
195
225
11
Open Ended
Why might the percentage of energy reaching Earth’s surface vary among locations?
12
Open Ended
Name the 3 examples of producers shown in the example picture at the beginning of the "Producer" section.
13
Match
Match the types of electromagnetic radiation to their descriptions below:
95% of the UV radiation from the Sun that reaches Earth's surface
The human body needs some of this radiation to produce Vitamin D, but too much will cause sunburns and DNA mutations.
All of this radiation is absorbed by the ozone layer of the atmosphere.
380-700 nm
Not visible, but detected as heat
UVA
UVB
UVC
Visible light
Infrared
UVA
UVB
UVC
Visible light
Infrared
14
Open Ended
Answer this question when you get to the page with the Photosynthetically Active Radiation Graph:
Using this graph as evidence, explain why most land plants appear green. Your answer should include which wavelengths are absorbed most and least efficiently by chloroplasts.
15
Categorize
CO2
H2O
Sugars
O2
Photons (light energy)
Organize these options into the right categories
16
Reorder
Reorder the following steps of Cellular Respiration
Glycolysis
Citric Acid Cycle
Electron Transport Chain
17
Dropdown
Energy converted to producer biomass = Solar energy at Earth's surface x 0.0125
Eneregy converted to producer biomass in one year = Energy converted to producere biomass x 7,658.6
The Gulf of Mexico has
The Temperate Forest has
The Tropical Rainforest has
The Tropical Savanna has
18
Open Ended
What examples are given in the activity for primary consumers and secondary consumers?
19
Open Ended
What examples are given in the activity for detritivores and how do they get their energy?
20
Open Ended
How does latitude relate to productivity?
21
Dropdown
The energy to secondary consumer is
The enrgy to primary consumer is
The enrgy to producers is
The photosynthetically active radiation is
The Solar energy at Earth's surface is
22
Open Ended
Why is there less energy at the top of the food web (or food chain)? Similarly, why is there less biomass (for example, fewer animals) at higher levels of food chains?
assignment with HHMI
By Carissa Hale
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