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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

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
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
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
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 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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