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Natural sciences

Grade 8

Environment and interactions

Module 36

Special food relationships

Activity:

To be able to identify special food relationships and to be able to describe them from examples

[lo 2.4]

Besides the typical predator and prey relationships there are certain relationships that are very interesting and special, especially because they are also linked to survival strategies.

SYMBIOSIS is the co-existence of two different organisms.

This relationship of co-existing can differ with regard to the amount of advantage or disadvantage gained by each party.

Commensalism

  • One of the organisms benefits and the other one is not really affected.

Mutualism

  • Both organisms benefit.

Parasitism

  • One organism definitely benefits at the expense of the other one.

Complete the table by pasting one of the sketches from the sketch sheet next to each of the relationships. Paste in some of your own examples as well. Describe the characteristics of the relationship in the right-hand column.

Special Food Relationships

EXAMPLES DESCRIPTION OF RELATIONSHIP
Mutualism
Parasitism
Commensalism

Assessment of CUTTING AND PASTING of SYMBIOSIS SKETCHES

Were you able to identify and describe SYMBIOSIS TYPES correctly?

[LO 2.4]

Activity:

To do research on parasitism and to represent the results graphically on a poster

[lo 1.1; lo 1.2; lo 1.3]

Work in groups of four and collect examples of the different kinds of parasites that use both humans and animals as hosts.

  • Explain the following:

1. the parasite and the host, and the nature of their relationship

2. symptoms that can be detected in the host

3. how to combat the parasite

  • Divide the different parts of the assignment among the members of the group so that each one will be responsible for a certain part.
  • Remember that plants also have parasites – find out more about this and use at least one plant as an example. Present the poster to the rest of the class.

Assessment of GROUP WORK, RESEARCH AND COMMUNICATION on PARASITES

Were you able to contribute to the group’s research work, and communicate it to the

rest of the class? LO 1.1 ; LO 1.2; LO 1.3

Assessment

LO 1: Scientific investigations:

The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

This is evident when the learner:

  • plans investigations;
  • conducts investigations and collects data;
  • evaluates data and communicates findings.

LO 2: Constructing Science Knowledge:

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

This is evident when the learner:

2.4 applies knowledge.

Memorandum

Activity: Special food relationships

Mutualism : bird and flower: The bird obtains food (advantage), flower is pollinated (advantage).

Parasitism : tick on horse: The tick obtains food (advantage), horse loses blood (disadvantage).

Commensalism : Cattle and birds: Cattle dislodge and carry ticks that occur on the grass, providing food for the birds while the cattle remain unaffected.

Sharks and small fish: The fish eat the remains of the food consumed by the sharks while the sharks remain unaffected.

Activity: Researching parasitism

  • Assess the learner's attempt in terms of the three assessment standards 1.1 (planning), 1.2 (collecting data), and 1.3 (interpretation and communication).

Questions & Answers

do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natural sciences grade 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11050/1.1
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