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Answer KEY environmental science MCQs

Answers to Objective Questions 1. (d) 2. (d) 3. (d) 5. Renewable 4. Fluorosis 6. 22 March 7. Copper mines, Rajasthan 8. Tru…

Oddo-Harkins Rule.

Elements with even atomic numbers are most abundant than odd ones; this is called the oddo-Harkins rule .

Crust,Mantle,Core density

Zone Thickness(Km) Vol. x 10 27 cm 3 Density gcm 3 Mass x 10 27 g …

Physical characteristics of the Hydrosphere

Physical characteristics of the Hydrosphere Mean Thickness (km)                           3.8 Volume (x 10 27 )       …

World Important Days

Important Days National science day                                 28 February World forestry day                          …

Antibiosis

Ø T he term antibiosis generally refers to the complete or partial inhibition or death of one organism by another through …

Upper mantle

Ø   Upper mantle contains predominantly 3 silicate materials. 1) olivine (Mg,Fe) 2 sio 4 2) pyroxene Cao.Mgo.2sio 2 …

UV-A range of 240-280 nm.

UV-A : Radiations have the wavelength in the range of 240-280 nm. UV-B : Radiations have the wavelength in the range of …

Ramsar Sites IN JK UT & Ladakh UT

Ramsar Sites The Ramsar Convention on Wetlands The Convention on Wetlands of International Importance, called the Ramsa…

Do you know

Earth is thought to have condensed and congealed from a nebula of dust, gas and icy comets about 4.6 billion years ago.

Do you know

The oldest surface rock yet discovered on earth known as the acasta Genesis lies in north-easternCanada and has been radio…

National Parks IN JK UT

National Parks Following five are the National Parks of J&K state: Dachigam National Park Salim Ali Na…

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