Grade 8 SUB : Science Ch 5 Conservation of Plants and Animals W.B. Work

 

1.	Choose the correct option
	a.		Which row correctly identifies examples of endangered species?
				Dodo			Musk deer
			i.	Yes			No
			ii.	No			No
			iii.	No			Yes
			iv.	Yes			Yes
	ans:		(iii)
	b.		Tasmanian wolfis a/an:
			i.          extinct species
			ii.         critically endangered species
			iii.        vulnerable species
			iv.        endangered species
	ans:		extinct species
	c.		The Jim Corbett National Parkis located in:
			i.          Tamil Nadu
			ii.         Madhya Pradesh
			iii.        Uttarakhand
			iv.        Maharashtra
	ans:		Uttarakhand
	d.		In which of the given sanctuaries, is a species reintroduction programme of the crocodilian species Gavialis gangeticuscarried out?
			i.          Koyna Wildlife Sanctuary
			ii.         Mudumalai Wildlife Sanctuary
			iii.        Gir Wildlife Sanctuary
			iv.        National Chambal Wildlife Sanctuary
	ans:		National Chambal Wildlife Sanctuary
2.	Fill in the blanks.
	a.		The Indian government started Project Tiger with the support of the _________
	ans:		World Wildlife Fund / WWF
	b.		Migratory birds fly to faraway places because of ___________ changes.
	ans:		Climatic
	c.		The IUCN publishes red list or the red data list of the worlds _____________ species in the Red Data Book.
	ans:		endangered
	d.		Nilgiri hollyis an example of an ______________ plant species.
	ans:		extinct
3.	Match the columns.
			Column A			Column B
	a.		Bharatpur bird sanctuary		i.	Haryana
	b.		Sultanpur lake bird sanctuary		ii.	Maharashtra
	c.		Koyna Wildlife sanctuary		iii.	Rajasthan
	d.		Mudumalai wildlife sanctuary		iv.	Madhya Pradesh
					v.	Tamilnadu
	ans: a – iii, b – i, c – ii, d – v
4.	Define the following terms.
	a.		Habitat
	ans:		A habitat is the natural home or environment of any plant or animal species.
	b.		Reforestation
	ans:		The planting of trees in areas which were forests till recently but were destroyed by natural or man-made activities.
	c.		Biodiversity
	ans:		The variety of different life forms that exist on Earth, theirinterrelationships and their relationship with the environment.
	d.		Species
	ans:		A group of living organisms consisting of similar individuals who are capable of interbreeding and reproducing a fertile offspring of the same species.
5.	Answer the following questions in 2-3 sentences.
	a.		Differentiate between endemic species and vulnerable species.
	ans:		Endemic species			Vulnerable species
			Species that are found exclusively in a particular area and are not found anywhere else are called endemic species.			Species that are likely to move into the endangered category in the near future are called vulnerable species.
	b.		Which part of a biosphere reserve is considered a transition zone? Give two examples of activities that are allowed in this zone.
	ans:		·         The outermost area or the outer area after the buffer zone of a biosphere reserve is called the transition zone. ·         Education and training related to wildlife, tribal settlements, cultivating of land, intensive tourism, timber collection, and cattle grazing are allowed in this area. (answers may vary, accept all correct answers)
	c.		Overexploitation of animals is one of the threats to biodiversity. Give any two reasons.
	ans:		Overexploitation of animals: ·         reduces the number of wild animals and endangers the survival of their species ·         may lead to the extinction of endangered animals ·         disrupt the entire balance of the ecosystem as both the predator and prey populations that were dependent on an overexploited animal will also be adversely affected
6.	Observe the picture and answer the questions that follow.
	a.		Identify the migratory bird.
	ans:		Rosy pelican
	b.		Threats to migratory birds have grown. Why?
	ans:		Threats to migratory birds have grown with habitat destruction and an increase in structures such as power lines and wind farms.
Fun Time
Unscramble the following:
a.		EFRAESNTDOOIT - Deforestation
b.		SUREE - Reuse
c.		ESERPERV - Preserve
d.		LOOUITNPL - Pollution
e.		REOTFS - Forest
f.		OTCNERUSIDT - Destruction
g.		RACOSONVITNE - Conservation
Challenge time
The species X is at an extremely high risk of extinction.
a.		What is extinction?
ans:		When there are no more individuals of that particular species of plant or animal alive anywhere in the world, it is called extinction.
b.		Sumatran Rhinoceros or one-horned rhinoceros – which of them can be species X?
ans:		Sumatran Rhinoceros
Practical Learning
Gir forest national park  is a wildlife sanctuary and protected forest area in Gujarat, India. The Government notified the large geographical extent of Sasan Gir as wildlife sanctuary on 18th September, 1965 in order to conserve the Asiatic Lion. It covers total area of 1412 square kilometres of which 258 Km forms the core area of the National Park.   Some of the problems faced by Asiatic lion to sustain their population in Gir were: ·         Incidences of poaching. ·         A number of drowning cases have also occurred after lions fell into wells. ·         Death due to canine distemper disease.   The concerned officials have taken many measures to conserve and increase the lion population such as installing sensors to detect animal and poachers’ movement in the area. Sensors not only helped to detect animal movement near water sources, but also kept a track of body temperature for the identification of diseases. Due to the sensors, it became easier to share information with the control rooms located inside the park and carry out rescue operations. Appropriate and timely actions by forest officials have significantly helped to increase the Asiatic lion population from 177 to 523 during the years 1966 to 2015.
a.		How did sensors help to detect diseases in asiatic lions?
ans:		Sensors helped to keep a track of body temperature for the identification of diseases in asiatic lions.
b.		List one more threat to the wildlife other than the ones mentioned in the paragraph. Also suggest the measures to conserve animals from this threat.
ans:		·         Problem: Habitat loss ·         Solution: Afforestation, reforestation, preventing overgrazing, preservation of natural habitats, reducing the use of wood, recycling of paper etc