Class - 4 || Unit - 1, Fields and Forests || EVS || Whiteboardweb

 

 

 

 

 Touch here 👆

 

 

 

 

 

 

What is an ecosystem?

 

 

An ecosystem includes the mutually dependent biotic and abiotic factors of a particular place.

 

Eg: Forest,hill,pond,bush,sacred groves.

 

 

What are the demerits of the destruction of ecosystems?

 

 

*Organisms lost their habitat

 

*Destruction of water resources

 

*Extinction(വംശനാശം) of organisms

 

 

 

 

How forest became an important ecosystem?

 

 

*Forest is the habitat of many organisms.

 

* Streams emerge from forest.

 

*Forest helps to get rain.

 

*Forest gives fresh air.

 

*Forest prevent soil erosion(മണ്ണൊലിപ്പ് )

 

*Forest helps to manage climate.

 

 

 

What are the human activities that destruct the ecosystem?

 

 

*Deforestation.

 

*Excessive use of pesticides.

 

*Sand mining.

 

*Disposal of plastic waste.

 

*Destruction of hill.

 

* Field filling.

 

 

 

What are the harmful effects of demolition of hills and forest?

 

 

 *Animals lose their home.

 

 * Plants perish.

 

 *Streams dry.

 

 * Water scarcity occurs.

 

 

 

  What are the activities meant to protect and preserve environment?

 

 

* Planting saplings

 

* Making pit for rain water.

 

* Mini mise the use of plastic.

 

*Gardening

 

* Making bio-fencing

 

 

 

 

 

What are the demerits of filling paddy fields?

 

  *Decreasing agricultural land

 

*Scarcity of food

 

*Scarcity of water

 

*Flood

 

*Extinction of living beings

 

 

 Eco system - Touch here (Video)

 

Activity

 

 

Prepare a note on "Trees our Wealth"