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biology class 7 > forests -our life line > Flashcards

forests -our life line Flashcards

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1
Q

what is a forest?

A

a terrestrial habitat covered with dense vegetation.

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2
Q

types of forests(state atleast 2)

A

-temperate
-tropical
-boreal

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3
Q

name some important points of TROPICAL forests.

A

-lungs of the Earth
-pharmacy
-timber(redwood rosewood)
-serve as natural habitats
-prevents soil erosion
-many raw materials
-helps in the water cycle
-natural barriers to disasters

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4
Q

full form of qbasic?

A

quick beginners all-purpose symbolic. instruction. code

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5
Q

name the layers of the forest.

A

emergent canopy understory forest floor

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6
Q

name the thins and special features of the emergent layer

A

PLANTS- kapok, redwood, Sheesham
ANIMALS-eagle, bat, monkey butterflies
ADAPTATIONS-to hot climate, winds, sunlight height 50 - 60m have drip tips

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7
Q

name the thins and special features of the canopy layer.

A

ANIMALS-arboreal birds, bats, monkeys
PLANTS-jackfruit, mango, amla
ADAPTATIONS-large dark leaves, smooth bark 30-45 m

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8
Q

name the thins and special features of the understory

A

PLANTS-ORCHIDS, vines, palms
ANIMALS-insects,birds,snake,frog.
ADAPTATIONS-little sunlight,humid,10-30m

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9
Q

name the biotic in forests

A

animals plants

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10
Q

examples of abiotic and abiotic interrelations

A

-temperature and sunlight
-rainfall and humidity

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11
Q

examples of aboitic -boitic interrelations

A

-dispersal and pollination
-decomposition
-tree roots prevent soil erosion
-biological weathering

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12
Q

What is a food chain?

A

is defined as the linear representation of organisms to obtain energy for maintaining the ecological balance.

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13
Q

what is the main energy of a food chain?

A

Sun

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14
Q

what represents the flow of energy?

A

———> (arrow symbol)

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15
Q

number of organisms in a food chain

A

4-5 maximum

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16
Q

what are food chains represented by?

A

a pyramid

17
Q

give any examples of a food chain

A

grass—>grasshopper—-.> za frog

18
Q

organisms which do not come under a food chain

A

HUMANS, decomposers, scavengers

19
Q

What is a food web?

A

a inter connection of multiple food webs.

20
Q

What is a decomposers?

A

an organism which break down dead matter which clean the ecosystem for new arrivals .they turn it to simple substances and mix it to soil.

21
Q

name the reasons for the destruction of forests

A

-an increase in human population
-excessive mining
-mass construction
-soil,water and air pollution

biology class 7 (7 decks)

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