A. Tick the correct answer:-

1. B 2. C 3. B 4. B 5. A 

B. Differentiate between the following:-

1. Place of flora and fauna is called biotic habitat.

    Place where animals live is called abiotic habitat.

2. Autotrophs can produce their own food. e.g. plants 

      Heterotrophs cannot produce their own food.e.g  animals 

3. Aquatic animals are water animals.

             Terrestrial animals are land animals.

4. Tropical forests are forests in tropical region.

       Temperate forests are forests with mild temperate condition.

5. Xerophytes are land small size plant.e.g.cactus

    Hydrophytes are water plant.e.g hydrilla 

C. Give one word answer for each of the following:-

1. Flora 2. Shelter 3. Bacteria 4. Arboreal Habitat 5. Migration 6. Cactus 7. Grill 

D. Match column A with column B:-

1. Hump 2. Streamline body 3. Grasslands 4. Camouflaging 5. Producers 

E. Give two examples for each of the following:-

1. Jackfruit plant , grapevine 2. Langoor , rabbit 3. Frog , bat 4. Penguin , polar bear 

5. Siberian crane , Arctic tern 

F. Give reasons for each of the following:-

1. Blubber is layer of fat. That keeps them warm in cold weather.

2. Hibernating frog makes their body warm.

3. To store water.

4. To store food.

5. To help them swim faster.

6. Because they are mammal.

G. Write true or false:-

1. True 2. True 3. True 4. False 5. True.

H. Circle the odd one out:-

1. Biome 2. Lotus 3. Yak 4. Wind 5. Camel.

I. Fill in the blanks:-

1. Grassland 2. Aquatic 3. Scavengers 4. Equator 5. Fins.

J. Short answer questions:-

1. Environment is natural world.

         Ecosystem is all the plants and living creatures.

2. Heterotrophs are those who cannot produce their own food.

3. Decomposer are microorganisms which improve fertility of the soil.

4. Habitat makes environment good.

5. Two types of rainforest-tropical and temperate.

6. (a) Broad waxy leaves.

(b) Very less root.

7. Daytime have high temperature. 

8. Plant vegetation is in the form of grases in grasslands.

K. Long answer questions:-

1. A place where a living organism lives is called its habitat.

Biotic components-It consists of all the living things in the habitats such as plants, animals and other living organisms. These constitutes the biological environment or biotic environment.

Abiotic components-It consists of all the nun living such as stone, soil,air ,water, light, heat etc. 

         These constitute abiotic and physical environment. Biotic components and abiotic components create in the ecosystem.

2. The biotic component are producers, consumers and decomposers.

    Producers produce food, consumer intake that food and after death of consumers microorganism mixes the death structure to the soil.

      This is the interdependence among producer, consumer and decomposer.

3. Those habitat which lives in water are called aquatic habitat.

      Marine habitat lives in sea.e.g coral reefs 

Freshwater habitat lives in river.e.g. fish, scraps,shrimp 

The coastal environment refers to the regoins where the land meets the sea.e.g. beaches,estuaries,mangroves 

4. Terrestrial habitats are-

Desert habitat camel

Grassland habitat-lions 

Rainforest habitat-jaguars

Tundra habitat-polar bear 

Mountain habitat- sheep.

5. Adaptation means to adopt with surroundings.  Adaptation in camels 

It has brown coloured body which matches well with the surroundings.

It has long eyelashes which protect the eye during sandstorms.

The animal drink over 40 litres of water at a time and this water is stored for later use.

6. The polar bear has white thick fur which makes it almost invisible in the white snowy background.

It has a strong sense of smell.

Its long curved and sharp claw help to hold the ice.

7. Grassland habitats are regions where the vegetation is dominated by grasses.

      The regions are mostly covered by long and thick grasses. Grasslands provide shelter to a large variety of animals including antelopes,deer.