Download DO NOW - O. Henry Science

DO NOW
Date:
03/27
Reminders:
What events can cause too much nitrogen
to be added to bodies of water? ( lakes,
oceans, rivers)
ESSENTIAL QUESTION:
How does biodiversity lead to a stable
ecosystem?
OBJECTIVES:
-Observe the factors within a microhabitat
-Define population, community, and
ecosystem
MICROHABITAT
a specific, small-scale environment in which
Microhabitat:
organisms live.
MICROHABITAT
-Look for a organisms under rocks or other
hidden places. Make sure you are gentle and
RETURN rocks to original spot.
-Using your student sheet, you will draw
different BIOTIC and ABIOTIC parts of the
micro-habitat that is the courtyard.
Courtyard Expectations
• Level 0 in hallway
• No more than a level 2 voice in courtyard.
• Classes are in session around us. Do not
disturb them.
• Stay in 1 place and focus on the tiny details
of the microhabitat!
HABITAT DEBRIEF
• Which species stay in the micro-habitat of the
courtyard?
• Which species enjoy a larger habitat than just
the courtyard?
What if?
Turn and talk
What might happen to the microhabitat
(courtyard) if the population of raccoons were
to increase on the O. Henry campus?
Definition
• Fill in the following definition for HABITAT on
your student sheet:
HABITAT:
A particular type of environment regarded as a
home for organisms.
Levels of Organization
• Label the levels of organization on your sheet
DEFINITIONS
With your table group, come up with your own
definition of the following….
Population
Community
Ecosystem
POPULATION
• a group of organisms of the same species
living in a specific area
COMMUNITY
• A group of organisms from different species
living in the same place and interacting with
each other.
ECOSYSTEM
• The interaction between organisms and their
physical environment.
DO NOW
Date:
3/29
Reminder:
-Write the question(s)
-Write in complete sentences
What is the difference between
a community and a population?
What is the very top level of our
biological levels of organization?
ESSENTIAL QUESTION:
How does biodiversity lead to a stable
ecosystem?
OBJECTIVES:
-Observe how organisms benefit each
other
-Explore symbiotic relationships and
how they relate to adaptations
VIDEO
• TED ED - Symbiosis
THINK
Review
• For multiple choice questions, answer
individually on your dry erase board.
• For open-ended questions, turn and talk to
your partner to come up with an answer
• Be prepared to share.
Symbiotic Relationship example
Creative Interpretation
In your notebook on page_____, pick one:
1. Describe a symbiotic relationship between two
or three organisms.
• The relationship can exist, or you can make it
up (including the organisms)
• Must be at least one page.
2. Draw a detailed diagram that represents a real
or fictional symbiotic relationship.
• Must be in color
• Must be labeled in detail
Succession Plot
Drawing
Abiotic/Biotic Factors
KEY:
Primary Succession
Secondary Succession
Predictions: What will you observe a week from now?
Week 1:
Week 2:
1000 Year prediction:
Succession Plot
• We will go outside and scrape out all of the
plant life from 1 square foot of soil.
• You will draw the plot with pencil.
• You will record any biotic or abiotic factors you
observe in the plot.
• You will predict what it will look like in one
week.
Outside Expectations
• Level 0 in hallway
• No more than a level 2 voice outside.
• Classes are in session near us. Do not disturb
them.
• Stay in 1 place and focus on the tiny details
of the succession plot!
BIODIVERSITY IQ TEST
Lets see how much you already know about
organisms!
Answer the questions on your sheet.
DO NOW
Date:
3/30
Reminder:
-Write in complete sentences
Describe a symbiotic relationship
between 2 or more organisms
Biodiversity
•Biodiversity refers to the number and variety of
species on Earth.
•The number of known species on Earth is about
1.6 million, most of which are insects.
•This is different from the actual number of
species on Earth, which may be closer to 13
million.
Importance of Biodiversity
•Biodiversity provides:
 a variety of products and resources
 a livable planet for us and for all other species.
•Biodiversity helps:
maintain the atmosphere
keep the soil fertile
purify water
Loss of Biodiversity
1. We share the environment with other organisms in a
complex network.
2. Each species has a role or niche to play in its
ecosystem.
3. If one species disappears from an ecosystem, the
ecosystem changes.
Keystone species are species that are so
important to the functioning of an ecosystem that
if they disappear, the ecosystem falls apart.
An Example in Texas:
Black-tailed Prairie Dogs
• Black-tailed prairie dogs once
roamed the western mid-west.
Now cover less than 1% of their
original territory.
Digging aerates and promotes
soil formation.
Clip back brush maintaining the
short grass prairie.
Provide food and shelter for as
many as 170 different animals.
Main Threats to
Biodiversity
• HABITAT LOSS
• INTRODUCED SPECIES
• POPULATION GROWTH
• POLLUTION
Habitat Loss
•the destruction of
habitats is the number
one cause of species
extinction.
Turn and Talk
•How does habitat loss affect biodiversity in an
ecosystem?
Introduced Species
• Nonnative or Exotic species that are not native to a
particular region.
Fire ants from South America entered the U.S. through
Mobile, Alabama, probably in soil used for ships' ballasts.
They were accidentally introduced around the 1930's and
have been spreading ever since.
Turn and Talk
•How do introduced species affect biodiversity in
an ecosystem?
Population Growth
•There are 6 billion humans living on Earth.
•Earth’s population of human beings is
increasing at a rate of about 222,000 people
each day.
•Humans take up more space and deplete
more resources than any other species.
Pollution
•Can be an oil spill, acid
rain, trash or insecticides
that can cause
reproductive failure in
fish, birds, and mammals
(like DDT).
Turn and Talk
•How does pollution affect biodiversity in an
ecosystem?
Extinction
Extinction occurs when the last individual of a species dies.
San Marcos Gambusia, Texas, 1983
Texas red wolf, Oklahoma, Texas, 1970
Mass Extinction
•
•
•
the extinction of many species during a
relatively short period of time.
often caused by a change in climate.
Many scientists believe that we are living
in a mass extinction, and that by the year
2100, 25% or more of all species of plants
and animals that were on Earth in 1900
will have become extinct.
Turn and Talk
•How will this mass extinction affect Earth?
Fusion Book
• Using Pages 375 – 379, complete the “Earth’s
Biomes” sheet
DO NOW
Date:
3/31
Reminder:
Write in complete sentences
Why is biodiversity so important?
Planet Earth Biomes
Work with a partner on a laptop and complete
Biome Research paper.
http://sciencespot.net/
Turn and Talk
• Compare your notes with those of your
shoulder partner.
• Discuss whether you would like to visit that
Biome and why or why not.
Biomes
•
•
•
•
•
•
•
Polar Ice
Tundra
Taiga (29:00)
Deciduous Forest
Savannah
Desert
Rainforest