Share and Compare
Turn and Talk
Ask students to turn to partners and talk about the
way energy moves through the Arctic ecosystem.
Prompt students by asking:
1.Recall ¿Cuáles son algunos de
consumidores del Ártico? (Possible answers:
polar bears, whales, zooplankton, fish, squid, crabs,
seals, and walruses)
2.Compare and Contrast ¿Cómo fluye la
energía a través de una cadena alimenticia
y una red alimenticia? (Energy flows from
producers, such as phytoplankton, to a series of
consumers. Overlapping food chains form a food
web.)
3.Summarize ¿Cómo fluye la energía a
través de un ecosistema del Ártico? (Energy
enters the ecosystem through phytoplankton, the
producers. The energy contained in phytoplankton
passes to the consumers of the Arctic through
the overlapping food chains that form a food web.
Many food chains end with polar bears.)
Read
Sum Up
Tell students that to sum up a text helps them pull together
the ideas of the text. Remind students that they summed up
the Become an Expert lesson in the Write section of Share and
Compare. Have students take turns reading the conclusions they
wrote to a partner. Invite them to compare and contrast their
conclusions.
As partners read and discuss their selections,
encourage them to ask questions of one another,
about details that interest them, points they find
confusing or unclear, or subjects they would like to
investigate further.
Write
Have students write about ways that energy flows
through an ecosystem. Ask them to compare what
they wrote with a classmate. Ask if partners recalled
the same ways that energy moves through an Arctic
ecosystem.
Draw
Have each student draw a different picture of an
organism from the same Arctic food chain and label
the name of the organism. Ask each group to put
the pictures in order to show how energy flows
through the food chain. Have each group share their
food chain with the class.
Life Science T132
