Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

(a)

Ammonia

(b)

Methane

(c)

Nitrous oxide

(d)

Ozone

One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as _____.

(a)

N₂O and CO₂

(b)

CFCs and N₂O

(c)

CH₄ and CO₂

(d)

CH₄ and CFCS

The unit for measuring ozone thickness _____.

(a)

Joule

(b)

Kilos

(c)

Dobson

(d)

Watt

The plants which are grown in silivpasture system are ______.

(a)

Sesbania and Acacia

(b)

Solenum and Crotalaria

(c)

Clitoria and Begonia

(d)

Teak and sandal

Which is not a greenhouse gas?

(a)

CO₂

(b)

N₂O

(c)

O₃

(d)

CFC

The total ozone layer over the earth surface is ____________________

(a)

30 DU

(b)

300 DU

(c)

3000 DU

(d)

0.3 DU

Identify the potent cause for deforestation.

(a)

Agriculture

(b)

Soil erosion

(c)

Afforestation

(d)

Forest fire

Total number of forestry extension centres in Tamil Nadu is ______________

(a)

16

(b)

32

(c)

18

(d)

51

Pick out the odd one out _____________

(a)

Biosphere reserve

(b)

National parks

(c)

Wild life sanctuaries

(d)

Botanical gardens

EIA stands for ________________

(a)

Ecological Information Analysis

(b)

Environmental Information Assessment

(c)

Environmental Impact Analysis

(d)

Environmental Impact Assessment

Baccaurea courtallensis

(1)

Southern Western Ghats

Nepenthes khasiyana

(2)

Casuarinas

Invasive species

(3)

Khasi Hills

Live fence

(4)

Acacia

Phytoindicator

(5)

Pinus

What is ozone hole?

Give four examples of plants cultivated in commercial agroforestry.

Define global warming.

What is ozone layer? Why it is essential?

Explain the term social forestry.

How do forests help in maintaining the climate?

List out the effects of global warming.

What are the major activities carried out by forestry extension centers?

Write a short note on Chipko Movement.

Explain the role of lakes in an ecosystem.

Explain afforestation with case studies.

What are the effects of deforestation and benefits of agroforesty?