Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Green Science-Filtration

No description
by

Sean Khong

on 18 August 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Green Science-Filtration

Arrangement
We put the
different

mediums
according to their
filtering abilities
Those which had the smallest openings were placed at the bottom
Those with larger openings were placed at the top
As water flows down, the different sized dirt particles are trapped, cleansing the water
First Layer (Top)
Issue
In Third-World countries...
How does this help?
Dirt particles and micro-organisms are
trapped
in the filter
Water is
safe
to drink
Water
An
essential
resource
Has many
different
uses
The most
abundant
substance on the earth's surface
Green-Science Filtration
Filtration
What is Filtration?
Water Purification Device
Materials:
1. Two 1.5 litre bottles
2. Small Rocks
3. Sand
4. Gravel
5. Plastic Mesh
6. Fish Filter Mat
7. Thin Cloth
8. Rubber Bands


Done By:
Asher Fam (7)
Sean Khong (18)
Joshua Seow (19)

Teacher: Mr Liang Chew Man


Clean water is
scarce
Harmful

micro-organisms
in the dirty water
Contract deadly
diseases
e.g. cholera
A
separation
technique
Insoluble
solids are separated from
liquids
in a solid-liquid mixture
Tiny
pores
in a filter only allow
small
liquid
particles
to pass through
Layers (Top to bottom):
1. Small Rocks
2. Sand
3. Sand Mixture
4.Gravel
5. Small piece of fish filter mat wrapped in cloth
6. Fish Filter Mat


Medium:
Small Rocks
Large spacing between rocks
Traps large dirt particles
Lets average and smaller sized dirt particles pass through
Spacing between the sand was the largest, followed by the sand mixture and then the gravel
Mediums:
Sand, Sand Mixture, Gravel respectively
Fifth and Sixth Layer
Mediums:
Small piece
of fish filter mat wrapped in a thin piece of cloth and
large piece
of fish filter mat respectively
Cloth was wrapped around fish filter mat to prevent sand and gravel from being
trapped
inside its openings
Fish filter mat had the smallest openings and was the
best
medium for filtration
What about the residue?
We made a
separate
part...
Made of 1.5 litre bottle and plastic mesh
Detachable
Plastic mesh would
trap
the large dirt particles
Size was small enough to be secured tightly to the main bottle
Overview
Plastic Mesh
Small Rocks
Sand
Sand Mixture
Gravel
Small piece of fish filter mat wrapped in thin cloth
Big piece of fish filter mat
Key:
=Water
Water contains size 7,6,5,4,3,2 and 1 impurities
Size 7 impurities are trapped
Water contains size 6,5,4,3,2 and 1 impurities
Size 6 impurities are trapped
Water contains size 5,4,3,2 and 1 impurities
Size 5 impurities are trapped
Size 4 impurities are trapped
Size 3 impurities are trapped
Water contains size 2 and 1 impurities
Size 2 impurities are trapped
Size 1 impurities are trapped
Purified Water
An
Inspirational
Material
Charcoal
Capable of filtering harmful chemicals
Filters microbes
Easily obtained
Limitations
Usage over a
prolonged
period of time
It is
big
and takes up more space
Second, Third and Fourth Layer
Thank you for your kind attention!
Full transcript