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Natural science

Grade 4

Life and way of living

Module 24

When water is dangerous

When might water be dangerous?

Use a red pencil crayon to circle examples of dangerous situations that involve water.

Memorandum

When might water be dangerous?

Discuss the dangers that are evident in the picture after the learners have completed the assignment.

  • When babies and toddlers bath in very hot water
  • When babies and toddlers are left in the bath without supervision.
  • Swimming pool dangers.
  • A river may be too shallow for diving without you knowing it, and may contain germs.
  • The water in a dam may be too shallow and contaminated (stagnant water).
  • There may be sharks in the sea, or currents that can lead to drowning.
  • Any spontaneous response form the class.

1. For cooking food, for cleaning and drinking

  • A pot of food the stove
  • Washing a fruit in running water
  • A child drinking water

2. For cultivating food

  • Maize plants growing
  • Fruit trees growing
  • Cabbages in the field

3. For transport and recreation

  • Yacht
  • Jet ski
  • Child angling

4. For cleaning

  • Father washing car
  • Washing dishes
  • Washing hands after going to the toilet

5. For plants and animals to live in

  • Ducks on a dam
  • Crocodile at the water
  • Dolphins swimming

6. For factories, industries and power stations

  • Industries
  • Power station
  • Factories

Questions & Answers

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
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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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.
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
How can I make nanorobot?
Lily
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 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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