i need an explanation of OXYGEN CYCLE with a diagram .

 explain water cycle with a diagram?????

Define Global Warming?

Are dried leaves living things or non living things? Give reason

 Please explain Oxygen Cycle?

Is rain always accompanied by thunder and lightning? If not, in which season do we get more thunder and lightning with the rain ?

describe the carbon cycle in detail with diagram ? its urgent

What are the causes of Soil Erosion?

explain role of air in bringing rain

 write causes and effects of air pollution

explain the process of soil formation

why is water called a wonder liquid

what is conservation of forest ?

role of atmosphere in climate control?

 how does water help in formation of soil?

What is rain water harvesting? Write a note on advantages of rain water harvesting?

Q. What are the sources of oxygen in the atmosphere?

1 Draw a well labelled diagram to show carbon cycle in nature.

2What causes acid rain?

3What is humus? What is its function in the soil?

4What is biological fixation? How is it different from nitrification? Give an E.g. Of organism involved in each of these?

5What is contribution of photosynthesis in carbon cycle?

6Draw a well labelled diagram to show N2 cycle in nature?

write a paragraph for about 100-130 words on endangered species and steps to preserve animals.

what can we do to reduce air pollution, water pollution, soil pollution and noise pollution

short note on water cycle

what is greenhouse effect

 can you plz give answers of activity 14.1 from ncert book (chp.14) and its reasons?????

Can you please give me the answers of activity 14.3 from NCERT book (page 191) chapter 14 and its reason. Please make it as quick as possible!!!!!!

where to find online nasa astronomy olympiad sample papers?

 can meritnation provide answers for the activities given in the ncert text book

activity-14.1 ,14.2,  14.3,  14.9,  14.10 , 14.11  (now answer section)

please give me the answers soon....

how do forest play an important role in maintaining water cycle?

Why is atmosphere essential for life?

Please explain the Nitrogen cycle as per NCERT Science textbook in simple language.

name the man made components which is resonsible for the depletion of ozone layer?

explain oxygen cycle

explain carbon cycle and write its importances ?

what are two types of natural resource ? define and give example of each

Definition of air pollution and water pollution

What are the three processes by which oxygen from the atmosphere is used up?

if atmosphere is held by the gravity, then why is it not falling into earth?? as gravity pulls everything towards earth. Then what is the force acting opposite to gravity????

Name two biologically important compounds that contain both oxygen andnitrogen. what is the role of nitrogen fixing bacteria?

 please define:-  1. Nitrogen fixation 2. Nitrification 3. Denitrification 4. Nitrogen assimilation 5. Ammonification

Also, Explain the difference b/w Biological Nitrogen fixation and Atmospheric Nitrogen fixation...

how is the quality of air affected and how does this change in quality affect us and other life forms?

explain water cycle with a diagram????/

 explain all the biogeological cycles?????

give at least 5 effects of water pollution

State any two harmful effects of air and water pollution ?

can i get an essay on the topic 'science is a boon not a curse'..........plz answer me as soon as u can?

List 3 ways by which aquatic life is affected by water pollution.

soil formation is done by both biotic & abiotic factors.List the names of these factors by classifying them as biotic & abiotic factors.

why only we inhale oxygen not any of other gases as there are many gases in the atmosephere

What are the two forms of oxygen found in the atmosphere ? What is their importance ?

 What is ammonification,nitrification and denitrification in nitrogen cycle

 what is respiration

write a short note on water pollution, air pollution $ soil pollution?????

mention causes for depletion of ozone layer

Acid rain and smog are said to be the consequences of air pollution. How are they

can someone explain me the carbon cycle please ?

Please solve this worksheet.
1. Name any two air-pollutants produced b burning of coal and petroleum.
2. Name the man made component which is responsible for the depletion of ozone layer.
3. Mention two factors that influence the pattern of winds.
4. Name the free living nitrogen fixing bacteria.
5. List two biotic compounds of biosphere.
6. List two functions performed by the atmosphere to act as blanket.
7. State reason for the following statement:
(i) Dust is a pollution.
(ii) People love to fly kites near the sea shore.
8. (i) What is the main reason for increase in CO₂ levels in atmosphere ?
   (ii) How does global warming occur ?
9. What is meant by acid rain ? How has it affected the environment and historical monuments ?
10. List any three human activities that would lead to an increase in the carbon dioxide content of air.
11. design an activity to show how convection currents are set up in the air and what is the nature of these current.
12. List two form of oxygen found in the atmosphere. Name the process(s) by which
(i) oxygen from the atmosphere is used up.
(ii) oxygen is returned to the atmosphere.
13. Give reason
(i) Presence of high levels of suspended particles in the air is harmful for us.
(ii) Morden farming practices bring about the conversion of fertile soil to barren soil.
(iii) The process of nitrogen fixation by bacteria does not take place in presence of oxygen
14. 'Water is an important natural resource which is consumed on very large scale by all living organism'. Explain with the help of diagram how a balance is maintained in nature between its consumption and regeneration in nature
15. Describe the major factors which lead to water pollution. Give examples.
16. (i) How is human a major factor in deciding the soil structure?
    (ii) List any four factor/process that are responsible for the formation of soil from the rocks.
17. (i) What is chemical formula of ozone ?
     (ii) Write the essential function performed by the ozone layer.
   (iii) What is cause of the depletion of ozone layer ?  

Mention two ways in which carbondioxide is fixed in environment .

   design an activity to show how convection currents are set up in the air and what is the nature of these currents 

How is CO₂ fixed in atmosphere?

why greenhouse effect is used for?

what is rhizobium and wat r its special features??

In coastal area, wind current moves from sea towards the land during; but during night it moves from land to sea. Discuss the reason.

How atmosphere acts like a blanket

 Please explain carbon cycle.

Examples for non leguminous plants.

influence of forests on improving the quality of air, water and soil. (5 marks)

what r the harmful effect of global warming ?

 four students did the experiment on measuring the speed of a pulse propogated through a stretched string as follows :

1.student A sretched his thick cotton string and gave it a strong transverse horizontal jerk

2.student B sretched a thin jute string taut and gave it a mild transverse horizontal jerk

3.student C sretched his thick cotton string very traut and gave it a mild transverse horizontal jerk

4.student D sretched his thin jute string and gave it a strong horizontal jerk

the best choice is of which student 

Ways to prevent soil erosion.

 design an activity to show how conventional currents are set up in the air.