Thursday, October 27th
MS-LS2-4
6.EE.C.9
Construct an argument supported by empirical evidence
Use variables to represent two quantities in a real-world problem that change in
relationship to one another, the dependent variable and the independent variable.
Analyze the relationship and create hypothesis and conclusion.
Big Idea: Use of acronyms to describe data
and Identify a study
Daily target: I can describe data by graphing
using DRY MIX and TAILS and analyze a
hypothesis (Review)
Homework: Energy Flow in Ecosystem (11/2)
Assignments:
Graphing Review and reteach packet (11/1)
Graphing Practice (period 3 10/31)
Entry Task: How many forms of energy can we trace
in an ecosystem?
Conclusion: Which is the only form of energy that will
occur in every transfer of energy?
Plan for Today:
Quiz #6
Energy Pyramid Slides (Cont.)
Vocabulary:
Decomposers: are organisms that break down dead or decaying organisms, and in doing so
carry out the natural process of decomposition
Energy Pyramids
 An energy pyramid is a
diagram that shows how
much energy is at each
step of the food chain.
 A 3d food chain.
 Shows how many
organisms at each step
of food chain
 Where are there more
organisms? Why?
Bottom Level Producers.
 Sunlight is the main source of energy for most life on
earth.
 These are Organisms that can make glucose during
photosynthesis.(energy from sunlight)
 Producers use most of the energy they make for
themselves.
1st level or Primary Consumers
 These are organisms that cannot make their own energy.
 They are herbivores (plant-eaters)
 They eat producers to get energy
 Some energy in the primary consumer is stored & not lost as heat to the
atmosphere or used by the consumer itself.
 This energy is available for another consumer (predator).
2nd level consumers Secondary consumer
 A consumer that eats another consumer for energy Is
called a secondary consumer and
 May be a carnivore, omnivore, predator, or a
scavenger
 Most of the energy the secondary consumer gets from
the primary consumer is used by the secondary
consumer.
3rd level consumers Tertiary Consumer
 A consumer that eats a consumer that already ate a
consumer Is called a tertiary consumer
 May be a carnivore, omnivore, predator,
or a scavenger
 Some of the energy is lost as heat, but some
energy is stored.
What is happening to energy?
Energy Pyramid
In nature, ecological
efficiency varies
from 5% to 20%
energy available
between successive
trophic levels (95%
to 80% loss). About
10% efficiency is a
general rule.
Fig. 4–19
Does all the energy this caterpillar eats get
passed to the bird who eats him?
Plant material eaten
by caterpillar
100 kilocalories (kcal)
35 kcal
50 kcal
Feces
Cellular
respiration
15
kcal
Growth
Figure 19.25
What does Bill Nye the Science Guy have to say about it?
How Many Chains are in
this web?
copyright cmassengale
How big can the pyramid get?
 Why is the third level consumer usually the top of the food
chain?
 Do you think its common to have 4th level consumers?
 Why is it unlikely to have 4th level consumers?
 Why is it even more unlikely to have a 5th and 6th level?