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Natural sciences

Ecosystems and the environmental balance

Educator section

Memorandum

Assignment 6:

a. They hibernate or sleep or remain very inactive.

b. They develop cold shivers and begin to shiver in order to raise the body temperature.

c. They develop a fever and begin to sweat in order to lower the body temperature. They become tired more quickly and rest a lot.

d. The mammals care for their young until they are strong enough, but this is not done by reptiles. The young are not cared for and must take care of themselves.

e. Oviparous: lay eggs outside of the body Viviparous: the young are born alive

f. The human is the most highly developed being and its physical, emotional and mental development therefore take much longer than that of other mammals.

Leaner section

Content

Activity: to indicate differences among vertebrates [lo 2.1]

(i) Other differences between Vertebrates

Animals also differ from one another with regard to what they eat, the organs used for movement, their ways of reproduction and the care of their young.

Ø Mammals

All animals that feed their young with milk are called mammals. Mammals care for their young until they are strong enough to be able to survive on their own. They also are warm-blooded animals, which means that their body temperature must remain more or less constant all the time.

Most mammals are land animals, such as ungulates (horses); predators (lions); rodents (rats); insectivores (hedgehogs) and anthropoids (baboons). A few species also live in the water, such as the dolphin, the whale and the seal.

Ø Reptiles

Reptiles are cold-blooded animals, which means that their bodies have more or less the same temperature as that of the surrounding environment. If it is too hot, for example, lizards will seek shelter in the shade. Reptiles do not suckle their young. As soon as the young are born, they go their own way and take care of themselves.

Assignment 6: Group work

Discuss the following questions in your groups and then answer them in full sentences:

1. What do many reptiles do in the winter when it becomes very cold?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(1)

2. What happens to mammals when their body temperature drops too low? Why does the body display such a reaction?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

3. What happens to mammals when their body temperature rises too high? How is the temperature restored?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

4. How does reproduction in mammals differ from that in reptiles?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

5. Most lizards are oviparous and most mammals are viviparous. Find out what this means and explain the difference.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

6. Humans suckle their young the longest. Why is this so?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(1)

SUMMATIVE: 10

Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.1: We know this when the learner recalls meaningful information.

Questions & Answers

what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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
for teaching engĺish at school how nano technology help us
Anassong
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
how to synthesize TiO2 nanoparticles by chemical methods
Zubear
what's the program
Jordan
?
Jordan
what chemical
Jordan
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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