1. 4-2-18 Energy in Ecosystems
Chapter 14, Lesson 3

2. Do Now: Read the following and answer the questions below.
Even a very tall teenager would be able to stand underneath the shoulders of a fully-grown elephant! The African elephant is the world’s largest and heaviest land animal—and one of its hungriest, too. Every day, an adult elephant eats about 150 kg (330 lbs) of grasses, tree bark, and other plant matter.
Why does an elephant need to eat such a huge amount of food?
How does an elephant’s diet compare to the food you eat?

3. Do Now: Read the following and answer the questions below.
Why does an elephant need to eat such a huge amount of food?
An elephant needs a lot of energy to move its heavy body from place to place. Elephants, like all other animals, get the energy they need from the food they eat. Much of what an elephant eats leaves its body undigested.
2. How does an elephant’s diet compare to the food you eat?
An elephant eats grasses, tree bark, and other tough plant parts that humans cannot eat. It does not eat meat.

4. FINAL REMINDER
Revised Science Fair Lab Reports (with rubric) DUE TOMORROW, 4/3/18

5. Homework
Key Concept Builder worksheet – How does energy move in an ecosystem.

6. Populations & Communities Quiz Review - Cambridge
Parasitism
Answers varied. 1 point was given for stating the correct type of relationship. 1 point was given for describing how each species is helped/hurt (or neither).
Mutualism
An animal’s habitat is the physical space in which it lives. Its niche consists of the unique ways in which the animal survives within that space, such as how it obtains food and shelter.
Commensalism
Biotic potential
Limiting factor
Carrying capacity

7. Populations & Communities Quiz Review – Comprehensive Science
A. where it lives
G. biotic potential
B. the unique ways an organism lives in its habitat.
E. limiting factor
F. carrying capacity
A. competition, predation, resources, disease, space
B. parasitism
A. mutualism
C. commensalism
D. symbiotic relationship

8. Populations & Communities Quiz Retake Requirement
Complete the Ch. 14, Lesson 2 Outline using your notes AND online textbook.
Study.
Check with Mr. Santos for availability to retake quiz in the mornings.
Come in at 8:30am with completed assignment to retake the quiz.

9. Ch. 14, Lesson 3: Energy in Ecosystems
Standard: SC.7.L.17.1
Lesson Objective: Students will be able to explain and illustrate the role of and relationships among producers, consumers, and decomposers in the process of energy transfer in a food web.

10. Energy in Ecosystems, Ch. 14 Lesson 3 Essential Questions
How does energy move in ecosystems?
How is the movement of energy in an ecosystem modeled?

11. Vocabulary
producer
consumer
food chain
food web
energy pyramid

12. EQ: How does energy move in ecosystems?
Standard: SC.7.L.17.1
Lesson Objective: Students will be able to explain how energy is transferred from producers to consumers.

13. Energy Flow The Sun is the source of almost all energy on Earth.
Organisms get energy from food that they make using light or chemical energy or by eating other organisms.
When one organism eats another, the energy in the organism that is eaten is transferred to the organism that eats it.

14. NOT HOW ENERGY IN ECOSYSTEMS TRAVEL HOW ENERGY IN ECOSYSTEMS TRAVEL
Energy Flow
Energy travels through organisms, populations, communities, and ecosystems in a flow.
When energy moves in a flow, it does not return to its source, as it does in cycles.
NOT HOW ENERGY IN ECOSYSTEMS TRAVEL
HOW ENERGY IN ECOSYSTEMS TRAVEL

15. Organisms and Energy
Scientists classify organisms by the way they get the energy they need to survive.
Producer: an organism that uses an outside energy source, such as the Sun, and produces its own food.
Productor: organism que usa una Fuente de energia externa, como el Sol, para elaborar su propio alimento.
Producers change the energy available in their environment into food energy that they use to live and reproduce.

16. Organisms and Energy
Some organisms, such as plants, are able to capture the Sun’s energy directly and convert it into energy-rich sugars that they use for food.
Light energy is changed to food energy by a process called photosynthesis.

17. Organisms and Energy
A few organisms are able to capture energy from chemicals in the environment and make food by a process called chemosynthesis.

18. Organisms and Energy
Other organisms cannot capture energy from sunlight or chemicals and must obtain their energy by eating food.
Consumer: an organism that cannot make its own food and gets energy by eating other organisms
Consumidor: organism que no elabora su propio alimento y obtiene energia comiendo otros organismos
Consumers use the energy and nutrients stored in other organisms for living and reproducing.
CONSUMERS

19. Organisms and Energy
Herbivores are animals that eat only producers, such as plants.
Omnivores are animals that eat both producers and other consumers.
Carnivores eat only other consumers.
Detritivores, including some insects, fungi, worms, bacteria, and protists, eat dead plant or animal material.

20. Video Summary: Amoeba Sisters – Food Webs and Energy

21. Exit Ticket – Answer on a notecard
How does energy move from a producer to other organisms (i.e., How do other organisms obtain energy from producers)?