Transcript DO NOW: Qs 1-3.

DO NOW: Qs 1-3. 
1. What is an appropriate title for
this diagram
(1) Energy Flow in a Community
(2) Biological Evolution
(3) Ecological Succession
(4) A Food Chain
2. Explain the role of the bacteria in the food web pictured to
the right. ________________________________________
________________________________________________
3. Certain organisms are able to store energy
from the Sun in energy-rich compounds.
Which event best illustrates this activity?
(1) A fox captures and eats a young rabbit.
(2) A caterpillar is eaten by a blackbird.
(3) Lettuce produces organic substances.
(4) Bacteria change organic material into
simple nutrients.
Energy Pyramid
Energy Pyramid for the following food chain:
DandelionRabbitSnakeEagle
Is this a stable ecosystem?
Why or why not?
HOLD THE PHONE…
WHERE IS ALL THE
ENERGY GOING?!
Organisms use some of the energy from
their food and it is also lost as HEAT
STOP & THINK!
Think, Pair, Share
1. In an ecosystem, one population of organisms has 987 members
and another population has 300 members. Which population is the
predators and which is the prey? How did you know?
2. You are stranded on a desert island. Decide which ONE type of
organism you should eat considering the amount available and
energy it would provide (not its taste ). Explain your answer.
3. Do you think energy is recycled in ecosystems? Why or why not?
Practice Problems
1. An energy pyramid is shown below.
Which graph best represents the relative
energy content of the levels of this
pyramid?
2. Which condition would most likely
upset the stability of an ecosystem?
(1) a cycling of elements between
organisms and the environment
(2) energy constantly entering the
environment
(3) green plants using sunlight to make
organic compounds
(4) a greater mass of animals than plants
3. The arrows represented as
most likely indicate
(1)energy released into the environment as
heat
(2) oxygen produced by respiration
(3) the absorption of energy that has been
synthesized
(4) the transport of glucose away from the
organism
4. Bluegrass grows & covers the American Midwest
Grasslands and is eaten by prairie dogs.
Rattlesnakes often eat these prairie dogs. When not
under cover, rattlesnakes are in danger of being
swooped up and eaten by large birds of prey.
(a) Write a food chain to represent this passage.
(b) Draw an energy pyramid for this chain.