U1L8 Food Webs

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Science is

about

talking to

people

Science is

making

observations

Science is

done in many

places

Supplies

Warm-up

● GREEN

PACKET

● Pencil/Dry

Erase Marker

● Computers

*CLOSED for
now!

1. Draw a picture on your whiteboard

to explain the connection between
clarity and dissolved oxygen levels.

2. Look over your notes

Habitat

Click here to go to Day 2 slides

Day 1 - Food Chains & Webs

Vocabulary

●Food chain

●Food web

●Producert

●Photosynthesis

●Consumer

●First-order consumer

●second -order consumer

●Third-order consumer

●Decomposer

●Energy pyramid

●Thermal energy

●Trophic level

Energy in Ecosystems

L 1.8-9

Day 1 (water quality review & food chains)

Agenda
●Warm-up

●Water Quality Check-in

●Model Ecosystems

●Food Chains & Food Webs

●Review

●Exit Ticket

●Left from last class: assign Water Quality Quizizz to
each class as HW

●Have food web notes printed

●Have Newsela article, “The food chain: who eats who in
the wild” available

●Have critter cards printed and cut

●Have tab open with PBS video Systems ready to play

●Exit Ticket?

I can begin to see how organisms in a community interact to
obtain the matter and energy they need to carry out their life
processes.

What?

Why?

Understand how energy is transferred from PRODUCERS to
CONSUMERS in an ecosystem.
Plus, we’ll check the water quality indicators in our ecosystems.

When Uncle Joe comes to dinner and
asks, “What’s happening at school?”

Which body of water do you think has

more dissolved oxygen?

Which body of water do you think has

more dissolved oxygen?

As the amount of CO2 in the water increases,

what happens to the pH?

It decreases
(becomes more acidic)

Are nitrites good or bad for aquatic animals?

Nitrites are harmful :(

(Icky “I”)

Why does water clarity matter?

The clearer the water, the more sunlight that can get
through to the plants to perform photosynthesis.

In AGENDA write down SCIENCE QUIZ

Water Quality &

Energy in Ecosystems

Per. 3, 5, 7

Wednesday, Oct 2

In AGENDA write down SCIENCE QUIZ

Water Quality &

Energy in Ecosystems

Per 2, 8

Wednesday, Oct 9

FROM YOUR SEAT -

Do you observe anything new about your ecosystems?

Elodea

(algae)

How do elodea & chlamydomonas get their energy?

They use the sun’s energy (Photosynthesis!)

Elodea

Producer or consumer?

Producer or consumer?

Daphnia
(water flea)

Daphnia

Daphnia

Producer or consumer?

Turn to this page

Day 2: Fill in today’s date.

9/27

Before you leave your station (CLEAN

UP):

❏ Do you need to add more water to

your ecosystem?

❏ Are all job cards returned?

❏ Are all sample beakers in their

proper locations?

❏ Wipe down your station with a

paper towel, if needed.

Temp and Clarity

Dissolved Oxygen

pH

Nitrites
A

B

D

C

🥽

Jobs for today

1. Must wear goggles.

2. Follow directions

for each task.

3. Clean up station.

4. Return to seats to:

a. SHARE DATA
b. Put 🥽

away

Water Quality Testing

Were all of your abiotic factors in a normal
range; if not, which ones weren’t?

Make an inference
as to why or why
not readings were
in normal range.

Let’s share and update our qualitative observations!

● Elodea, Chlamydomonas, and Daphnia were added.
● The Daphnia were observed swimming.
● The Elodea has roots.
● Air bubbles were observed coming off of the Elodea.
● The Elodea is green.

Turn back to your Aquatic Ecosystem Drawing page.

Draw with pencil, label, add color.

Chlamydomonas

1.Do not use
arrows.

2.

Draw a straight
line to side of
tank and write
the name of
organism
horizontally.

3.

If the organism is
microscopic,
draw a circle
around it.

Daphnia
Leave lots of room for future
organisms to be drawn

Water Level

Elodea

Clip packet into your binder

Brain
Break

Find
three
birds

WHAT? Create a Northern Virginia food web and
observe how interactions change as organisms are added
or removed.

WHY? So that I can show how energy flows through
ecosystems.

SYSTEM

Talk with your table group.

SYSTEM

Share

SYSTEM

Consists of two or more parts
that interact to form a whole

SYSTEM

Frost Middle School

System?

Ecosystem

Which
populations
would
you expect
to find in
this
ecosystem?

How might
these
populations
interact
with each
other?

Group the cards into categories of your

own choosing!

Why did you group
your cards this way?

Next…

group the cards according to
what you think each organism
eats.

How did you group?

Next…

Use 3 organisms to create a

simple food chain

Food Chain

Does the direction of the

arrows matter?

What do the arrows represent?

Arrows show the
direction of energy!

Next…

Create a diagram by arranging your cards on
your boards and draw arrows connecting each
organism to its food source.

Remember:

Arrows show the
direction of energy!

Look at another group’s work.

What is the same/different from yours?

Now…

Remove 3 cards of your choosing.

How does removing these organisms affect the

connections you drew?

Come up with 3 effects of this!

Finally…

1. Add the mushroom and bacteria to

your diagram.

2. How do these organisms connect to

the others? (use arrows!)

Find 3
similarities
between
this
diagram
and the one
you made!

Please put the cards

back in the baggie!

Trophic levels in a Food Chain

Producer

1st Order
Consumer

2nd Order
Consumer

3rd Order
Consumer

“herbivore”

To do with
EATING or

nutrition

1. Take a copy of the notes and article from

table folder.

2. Read the article
3. Complete PAGE 1 of your notes (front

and back) using the article

Done early? Work on your U1L8 Exit Ticket
💦

and Quizizz (homework if not done!)

56

Food Webs

Ecosystems have many
different food chains.

All of the interconnected

and overlapping food
chains in an ecosystem
make up a food web.

Ecosystems

Change!

How might
something be

removed?

Ex: Cougars

In 2018, the cougar
(mountain lion) was
declared extinct in

Northern Virginia due to

habitat loss and

overhunting.

Cougar Extinct

How does this
affect the rest of
the food web?

SYSTEM

Go to Schoology

Join our Science Class

Click on the link and
choose JOIN CLASS

In today’s folder in Schoology:

- Work INDEPENDENTLY
- You may use your notes.
- 2 attempts

Finish Quizizz about Water Quality

Clip notes into your binder

● In today’s folder

● May use notes.

● 2 attempts

● No talking, please.

Notes may be kept here at your testing station in the

folder!

Now you try!

Make a food web
using organisms
local to Fairfax

County.

Nothing done past this point

for Day 1

Continue on the next slide
for Day 2 (9/30 and 10/01)

Day 2 (food webs & energy pyramids)

Agenda
●Warm-up

●Water Quality Day 3

●Food Web Review

●Yellowstone

●Exit Ticket

●Le

●
●Have tab open with PBS video Systems ready to play

●Exit Ticket?

Science is

about

talking to

people

Science is

making

observations

Science is

done in many

places

Supplies
Day 2 Warm-up

(ANSWER on WHITEBOARDS)

● Agenda
● Science binder

Green Packet
Food Chains Notes
✅

● Pencil/Dry

Erase marker

● Computers

1. Using your completed food web

notes, write down one of your 3 food
chain examples.

2. What do the arrows represent?

3. What is the importance of

decomposers?

Habitat

*Make sure your homework is ✅

Science is

about

talking to

people

Science is

making

observations

Science is

done in many

places

Supplies

Warm-up (ANSWER on WHITEBOARDS)

● Agenda
● Science binder

Water quality notes
Food web notes

● Pencil
● Computers

1. Using your completed food web

notes, write down one of your 3 food
chain examples.

2. What do the arrows represent?

3. What is the importance of

decomposers?

Habitat

Keep your warm-up

written on your
whiteboards!

In AGENDA write down SCIENCE QUIZ

Water Quality &

Energy in Ecosystems

Per. 3, 5, 7

Tuesday, Oct 8

In AGENDA write down SCIENCE QUIZ

Water Quality &

Energy in Ecosystems

Per 2, 8

Wednesday, Oct 9

WHAT? Continue taking qualitative and
quantitative observations of our model ecosystem
and model how energy moves through ecosystems

WHY? So that I can how energy is passed on from
one organism to another

FROM YOUR SEAT -

Do you observe anything new about your ecosystems?

Cabomba

Duckweed

Spirogyra

Producers or consumers?

Turn to this page

Day 3: Fill in today’s date.

9/30

Before you leave your station (CLEAN

UP):

❏ Do you need to add more water to

your ecosystem?

❏ Are all job cards returned?

❏ Are all sample beakers in their

proper locations?

❏ Wipe down your station with a

paper towel, if needed.

Temp and Clarity

Dissolved Oxygen

pH

Nitrites
A

B

D

C
🥽

Jobs for today

1. Must wear goggles.

2. Follow directions

for each task.

3. Clean up station.

4. Return to seats to:

a. SHARE DATA
b. Put 🥽

away

Water Quality Testing

Were all of your abiotic factors in a normal
range; if not, which ones weren’t?

Make an inference
as to why or why
not readings were
in normal range.

3

Let’s share and update our qualitative observations!

Turn to this page in your Model Ecosystem Packets

Draw and properly label each new organism.

Use color !

Cabomba

Spirogyra

Duckweed

Leave lots of room for future
organisms to be drawn

Clip notes into your binder

Homework: All notes
should be complete.

✅

Food chain definition?

Food chain:

One possible way
that energy and
nutrients can move
through the
ecosystem.

Look back at your
warm-up:

Which food chain did
you choose to write
down?

Share at your table

Q1. Food chains begin with?

Producers

Q2. Arrows? Which direction? Why?

Arrows show the direction of energy!

On your notes:

Trophic levels

● Producer
● 1st order consumer
● 2nd order consumer
● 3rd order consumer

Label your food chain with trophic levels.

Trophic levels of a food chain

Producer

1st Order
Consumer

2nd Order
Consumer

3rd Order
Consumer

herbivore

Label your food chain with trophic levels.

Trophic levels of a food chain

Decomposers

Trophic levels of a food chain

Q3. Decomposers - why are they important?

Trophic levels of a food chain

Q3. Decomposers - why are they important?

Decomposers complete the food chain. They
turn dead organisms into organic materials
returning nutrients back to the soil.

Trophic levels of a food chain

Q3. Decomposers - why are they important?

Food Webs

104

Food Webs

All of the

interconnected
and overlapping
food chains in an
ecosystem make
up a food web.

Let’s review. Join me in Pear Deck.

SYSTEM

Has anyone ever been to

Yellowstone National Park?

“The Yellowstone National Park is a nearly
3,500 square mile wilderness recreation
area atop a volcanic hot spot. It is located
mostly in the state of Wyoming, with parts
in Montana and Idaho too. It is home to
hundreds of animals species to include
bears, wolves, bisons, elk, and antelope.