Our Environment Blog 3

Our Environment


Important Instructions:

  • Keep your text book open for reference.
  • Home Assignment need to be done in your Biology note book.
  • All the intext exercises as well as exercise given at the end of the chapter have to be done.

Learning outcomes:
  • definition of food web
  • construct food web
  • analyse and discover the reason of ozone layer depletion
  • justify and ciculate awareness for protection of ozone layer

Revision

What is the rule of 10%?

The 10% Rule means that when energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed on. 

( Pg 258 has the reason of the 10 % rule.)

Marine Food Pyramid | National Geographic Society

Let us continue

Biological Magnification


It is the increase in concentration of toxins up the food chain,

The process by which the harmful & toxic substances reach the tissues of organisms at higher levels in a food chain.

It occurs when pollutants taken up by organisms at the base of the food chain reach high concentrations in the bodies of animals at the top of the food chain.

Food web
  • Is formed by interconnections of different food chains.
  • Is a graphical representation of ‘Who eats Whom’ in an ecosystem.
  • Page 258 last point with a bullet.
Food webs consist of a number of food chains meshed together.

Buy The Food Chain vs. The Food Web - From Simple to Complex ...

Ozone layer depletion


The ozone layer protects the earth from the sun’s ultraviolet (UV) radiation. 

CFCs released into the atmosphere react chemically with ozone molecules and are depleting the layer.

Ozone is present at a very high level in the atmosphere. It blocks the UV radiation of sun. Ozone is a product of UV radiation.

At high level in the atmosphere the UV rays split the oxygen molecules to form oxygen atoms. These combine with oxygen molecules to form ozone. 

Ozone causes skin cancer, cataract and reduces crop production.

HOME ASSIGNMENT

PAGE 262
1 , 3 , 7 , 8 , 9

Comments

  1. Shaurya ShilMay 2, 2020 at 8:16 AM

    Good morning sir
    Shaurya Shil

    ReplyDelete
  2. SiddharthMay 2, 2020 at 8:17 AM

    Good morning sir
    Siddharth kushwaha

    ReplyDelete
  3. Bennett JoyMay 2, 2020 at 8:18 AM

    Good morning sir
    Bennett Joy

    ReplyDelete
  4. Sahej Grover May 2, 2020 at 8:19 AM

    Good morning sir

    ReplyDelete
  5. Harsh vardhanMay 2, 2020 at 8:19 AM

    Good morning sir
    Harsh vardhan

    ReplyDelete
  6. UnknownMay 2, 2020 at 8:20 AM

    Good morning sir
    Divij Gogia

    ReplyDelete
  7. Vidit GoelMay 2, 2020 at 8:21 AM

    Good morning sir

    ReplyDelete
  8. Tuan Muan LalMay 2, 2020 at 8:22 AM

    Good morning sir
    Tuan Muan Lal

    ReplyDelete
  9. Elizabeth RejiMay 2, 2020 at 8:23 AM

    Good morning sir
    Joel Reji

    ReplyDelete
  10. Pratham ChhabraMay 2, 2020 at 8:24 AM

    Good Morning Sir

    ReplyDelete
  11. Ojas GirotraMay 2, 2020 at 8:27 AM

    Good morning sir
    Ojas Girotra

    ReplyDelete
  12. KENNARD RENCE WILLIAM 10-DMay 2, 2020 at 8:29 AM

    Good morning sir
    Kennard Rence William

    ReplyDelete
  13. Sidh chichraMay 2, 2020 at 8:32 AM

    Good morning sir
    Sidh chichra

    ReplyDelete
  14. Sharon SanthoshMay 2, 2020 at 8:33 AM

    Good morning sir
    Sharon Santhosh X-D

    ReplyDelete
  15. MadhurMay 2, 2020 at 8:35 AM

    Good morning sir
    Madhur Basra

    ReplyDelete
  16. emmanuel gomesMay 2, 2020 at 8:36 AM

    Good morning ma'am
    Emmanuel GOMES

    ReplyDelete
  17. Aryan AnandMay 2, 2020 at 8:45 AM

    Good morning sir
    Aryan Anand

    ReplyDelete
  18. Anshumaan SinghMay 2, 2020 at 8:46 AM

    Good morning sir,
    Anshumaan Singh,
    X-D

    ReplyDelete
  19. Aaron GariMay 2, 2020 at 8:47 AM

    PRESENT

    ReplyDelete
  20. Baibhav KunduMay 2, 2020 at 8:47 AM

    good morning sir

    ReplyDelete
  21. Shourya GuptaMay 2, 2020 at 8:50 AM

    10D

    ReplyDelete
  22. Sidh chichraMay 2, 2020 at 8:52 AM

    Good morning sir
    Sidh chichra

    ReplyDelete
  23. Adavya DhirMay 2, 2020 at 9:05 AM

    Good morning Sir
    Adavya Dhir

    ReplyDelete
  24. Aryan VermaMay 2, 2020 at 9:28 AM

    Good morning sir
    Akshat Verma

    ReplyDelete
  25. Tuan Muan LalMay 2, 2020 at 10:04 AM

    This comment has been removed by the author.

    ReplyDelete
  26. UnknownMay 2, 2020 at 12:16 PM

    Good afternoon ma'am
    Rachit James

    ReplyDelete
  27. Talha AnsariMay 2, 2020 at 1:06 PM

    Good Afternoon Sir
    Talha Ansari

    ReplyDelete
  28. Shaurya NarangMay 2, 2020 at 1:06 PM

    Good afternoon sir,
    Shairya Narang

    ReplyDelete
  29. Anmol SinghMay 2, 2020 at 1:08 PM

    This comment has been removed by the author.

    ReplyDelete
  30. Anmol SinghMay 2, 2020 at 1:10 PM

    Good Afternoon Sir
    Anmol Singh

    ReplyDelete
  31. UnknownMay 2, 2020 at 2:08 PM

    Good afternoon sir
    Ayaan Edward

    ReplyDelete
  32. Swyam kapoorMay 2, 2020 at 2:31 PM

    Good afternoon ma’am

    ReplyDelete
  33. Akshat ChadhaMay 2, 2020 at 4:17 PM

    Good afternoon sir
    Akshat Chadha

    ReplyDelete
  34. JapmannMay 2, 2020 at 4:59 PM

    Good afternoon sir
    Japmann singh

    ReplyDelete

Post a Comment

Popular posts from this blog

Sources of Energy Blog 4

SOURCES OF ENERGY Lesson 4    Hello everyone! I hope you are keeping well and taking good care of yourself! Learning outcomes : explore alternate sources of energy giving prime importance to environmental  conse q uences All  energy sources  have some  impact  on our  environment .  Fossil fuels—coal, oil, and natural gas—do substantially more harm than renewable  energy sources  by most measures, including air and water pollution, damage to public health, wildlife and habitat loss, water use, land use, and global warming emissions. No source of energy can be called pollution-free, because, the use of any source of energy disturbs the environment in one way or the other.  A source of energy like a solar cell is pollution free in actual operation but the assembly of the device might have caused some damage to the environment. So, in absolute sense,  no source of energy can b...
Read more

Sources of Energy Blog 1

Image
SOURCES OF ENERGY     Important Instructions: (i) Keep your text book open for reference. (iv) Home Assignment need to be done in your physics note book. (v) Complete your index, put chapter name, date, Physics note book. (vi) Important links are provided in the blog for better understanding. Home Assignment to be done in the Physics copy  After this class, you will be able to: identify the parameters needed to classify a source as a good energy source. interpret the advantages of using fossil fuels, thermal power plants and hydro power as sources of energy INTRODUCTION Energy is the ability to do work or the total power derived from our natural resources.  The energy exists in many forms and can be converted from one form of energy into another.  Energy is mainly derived from natural sources like the sun, oceans, fossil fuels, wind etc and is converted into electrical energy that we consume for o...
Read more

Sources of Energy Blog 2

Image
SOURCES OF ENERGY   LESSON 2 Welcome students! Learning outcomes :  At the end of the topic, learners will be able to 1. analyse the structure , function and uses of a biogas plant. 2. appreciate the technology of drawing best out of waste 3. interpret the advantages and disadvantages of using wind energy , solar energy as sources of energy. Instructions: Topic marked in red need to be copied in Physics note book. Biomass Biomass is the source of energy derived from living things (organic matter).  biowaste such as cow dung  When wood is burnt in a limited supply of oxygen and water until volatile materials are removed, the residue left behind is charcoal.  Charcoal has good heat generating efficiency. It also burns without flames. Bio-gas plant Cow dung, sewage waste, plant matter are decomposed in absence of oxygen to produce biogas.  A biogas plant is a dome-like structure built with bricks where cow dung...
Read more