# 1.2 General science

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To study root systems of plants

## Memorandum

1. Equally thick: yes no

Equally long: yes no

Main root: no yes

Branching no yes

2. Taproots: Trees and shrubs, some herbs, climbers. Remaining alive for longer that a year, growing tall (needing an anchor) and/or has to obtain water from deep in the ground.

Adventitious roots: groundcovers and annual plants/plants that remain alive for one year only. Takes up every drop of water, even dew. Does not need to be anchored well to remain upright.

Diagram: Adventitious roots, taproots, monocotyledons, dicotyledons

## Plant diversity

In Grade 6, you learned that plants could have leaves with different shapes because they are adapted to specific environmental conditions, and that the plants can be divided into groups on the basis of their leaves.

Let us now take a look at the roots of plants.

Study the representations of the two types of roots below (you will make the teacher very happy if you can bring real examples of plants with the two types of roots to class).

## A tap-root system

1. Try to complete the table by writing yes or no in each block:

 Tap-root system Adventitious root system All the roots are equally thick All the roots are equally long There is a main root that is longer and thicker than the others The roots branch (smaller roots grow from the larger roots)

2. Which of the plants in the sketch of an ecosystem (page 3) do you think will have adventitious roots and which do you think will have taproots? Also say why you think so:

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Do you still remember the division of plants that you did in Grade 6 that is shown below? Use what you have just learned about root systems to add to the division by writing the missing information in the open blocks (ask your teacher to help you):

## Assessment

Learning Outcome 1: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 1.2: We know this when the learner interprets information.

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 (at least definitions and complex facts);

Assessment Standard 2.2: We know this when the learner categorises information (can compare the properties of categories of organisms);

Assessment Standard 2.3: We know this when the learner interprets information;

where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
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
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
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
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?
what is a peer
What is meant by 'nano scale'?
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 ?
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?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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