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Natural sciences

Ecosystems and the environmental balance

Educator section


Assignment 11:

  • Lion
  • Blue whale (largest mammal)
  • Bat
  • Pangolin and hedgehog

What do you remember?

(i) An ecosystem is formed by all the living organisms that have a mutual influence on one another and on their environment

(ii) air; water; sun and soil

(iii) organism – matter – energy

(iv) plants (producer); caterpillars (primary consumers); birds (secondary consumers)

(iv) horse; elephant

(vi) Carnivores are meat eaters and herbivores are plant eaters

Leaner section


Activity: to distinguish between herbivores, carnivores and omnivores [lo 1.2, lo 2.1, lo 2.2]



They eat seed-pods, grass, leaves and vegetables. They do not eat meat and therefore do not hunt. Instead, they are hunted by carnivores. Their bodies are adapted to suit their way of life and feeding habits.

They have large ears and can hear exceptionally well. Some of them have stripes (e.g. kudu, nyala, zebra, etc.) to camouflage themselves. Many carnivores only see shades of grey, black and white. As carnivores do not distinguish between colours, kudu and other buck can remain safe while they stand quite still when danger threatens.

Most plant-eaters have very good eye-sight, with the eyes set at the sides of the head, which gives them a wide field of vision. They also have a good sense of smell. Herbivores (e.g. kudu, rabbits, hares, locusts, springbuck, sheep, etc.) are constantly on guard against danger!

Assignment 11

Write a short report on one of the above-mentioned animals, describing its ears, eyes, sense of smell, food and enemies.











CRITERIA 1 2 3 4
Research done correctly _____ _____ _____ _____
Data meaningful _____ _____ _____ _____
Reporting complete _____ _____ _____ _____


The largest group of carnivores are mammals, which include the cat family (wild cats, lions, leopards, tigers and domestic cats) and the dog family (wolves, foxes, jackals, wild dogs and domestic dogs).

They are hunters and can only eat once they have caught their prey (not the domestic dog). Carnivores hear and smell well and have strong, pointed jaws to snap at their prey and tear off chunks of flesh easily. Their eyes are situated in the front of their heads, so they can focus well and judge distance very accurately. They also have strong legs that enable them to be fast and agile when chasing their prey. They can run fast for long distances, without tiring.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
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Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
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.
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s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
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Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
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abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
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I'm interested in nanotube
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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
what is system testing
what is the application of nanotechnology?
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
anybody can imagine what will be happen after 100 years from now in nano tech world
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
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
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I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
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Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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