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Natural sciences

Grade 8

Environment interactions

Module 34

The role of plants in an ecosystem

Activity:

To identify the role of plants

[lo 2.4]

  • Complete the table by indicating either the description or the function. Complete the column to the right by pasting in some of the sketches (from the page with sketches) in the right place.
FUNCTION DESCRIPTION SKETCH
Nutrition
Air filter
Birds build nests, insects lay eggs, predators and prey take cover here.
Camouflage
Soil erosion is prevented and humidity is retained.
Soil is enriched.
  • Write 270 words on the role of plants in ecosystems.

Assessment of ROLE IDENTIFICATION

Were you able to distinguish basic roles?

[LO 2.4]

Activity:

To discuss the role of animals in ecosystems

[lo 2.2; lo 2.4; lo 3.2]

  • Complete the table by indicating either the description or the function. Complete the column to the right by either pasting in a picture or making a drawing in the right place.
FUNCTION DESCRIPTION SKETCH
Nutrition
Pollination
Mammals, birds, mice and insects distribute seeds.
The soil is enriched.

Assessment of CLASSIFICATION

Were you able to identify and classify basic ROLES? LO 2.2; LO 2.4

Advantages and Disadvantages of Animals

  • Are all animals beneficial to the environment?
  • Can animals be harmful to the environment?
  • Write significant aspects that have been named by your classmates here:

Assessment of CLASS DISCUSSION

Were you able to list disadvantages? [ LO 3.2]

Assessment

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:

  • categorises information;

2.4 applies knowledge.

LO 3: Science, Society and the Environment

The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

This is evident when the learner:

3.2 understands sustainable use of the earth’s resources.

Memorandum

Activity: Identifying the role of plants

FUNCTION DESCRIPTION SKETCH
  • Plants store food that nourishes and keeps animals alive
Baboon or maize plant
  • Leaves absorb carbon dioxide and release oxygen
Leaf with arrows indicating direction
Protection, Homes Branches of trees
  • Bark and leaves enable insects to be unnoticeable because of the similarity of lines and spots that are developed
Moth against background of a tree trunk
Anchoring, enriching the soil Roots of plants
Plant material returns to the earth Leaves on the ground

A paragraph dealing with the role of plants

  • This should aim to provide practice in communicating through writing. The content of the previous table must be presented and expanded in a written paragraph.

Activity: Discussing the role that animals play in ecosystems

FUNCTION DESCRIPTION SKETCH
  • Animals serve as food for other animals
Lion with a zebra
  • Insects pollinate flowers, for fruit to develop
Butterfly on a flower
Dispersal of seed
  • Mammals, birds, mice and insects disperse seeds
Mouse eating a fruit
Fertiliser
  • The soil is enriched
Antelope, rock rabbit or rabbit droppings

CLASS DISCUSSION

  • Can animals harm the environment?
  • Yes – overgrazing, in particular, leads to the eradication of plants and thereby to soil erosion. Exotic animals can be harmful because of the way in which their numbers could increase in the absence of their natural enemies. This would result in the displacement of indigenous animals and even cause the eradication of specific animal and plant species.

The food pyramid

  • Green plants, herbivores, carnivores, carrion eaters.
  • Incline: the steeper the incline, the smaller the amount of energy or biomass that is lost from one level to the next.

Food chains related to a text for reading

  • E.g. twigs / organic material - ants - antlion - gecko - snake
  • Grass - locust - gecko - snake
  • Twigs / organic material - field mouse - snake

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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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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