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Electronic configuration : 2, 8, 8, 2
(i) 'X'is in the 2nd group and 4th period of the periodic table.
(ii) X    +     Y----->     XY
  2,8,8,2    2,6
(iii) The nature of the compound formed is basic because X is a metal and Y is oxygen. The oxides of metals are basic in nature.

Geotropism is necessary for proper growth and orientation of a plant. It is because of geotropism that root and shoot growth in their respective directions.

(a) The movement of plant part in response to gravity is called geotropism. 

Example – Roots grow towards gravity. 

(b) If the plant part moves towards the direction of gravity, it is called positive geotropism. 

Example – Roots. If the plant part moves against the direction of the gravity it is negative geotropism. 

Example – Stem

(c) Tendrils.

Electronic configuration = 2,8,8,2. 

(i) 'X' is present in the 2^nd group and 4th period of the periodic table.

(ii) XY.

(iii) Basic because X is a metal and the oxides of metals are basic in nature (Y, Atomic number = 8, Oxygen)

Cold desert: 

1. Gobi 

2. Taklamakan

Hot desert: 

1. The Arabian (Saudi Arabia)

2. The Thar (India and Pakistan) The largest desert in Asia is the Arabian Desert.

(b)  2 1 3 4

(a) Both A and R are individually true and R is the correct explanation for A

1. There are forty eight countries in Asia.

2. The countries are grouped into several realms based on landscape and political status such as

(a) East Asia

(b) Southeast Asia

(c) South Asia

(d) Southwest and 

(e) Central Asia

Intermontane plateaus: 

1. Intermontane plateaus are found in the mountain ranges. 

2. Eg. The plateau of Anatolia, The plateau of Iran and the plateau of Tibet

Southern plateaus: 

1. The southern plateaus are relatively lower than the northern plateaus. 

2. Eg. Arabian Plateau, Deccan Plateau, Shan Plateau and the Yunnan Plateau.

Answer is (b) Dates

1. Tokyo

2. Shanghai 

3. Singapore 

4. Hongkong 

5. Chennai 

6. Mumbai 

7. Karachi 

8. Dubai

India is the leading producer of Mica

Mandarin

(a) Reason : Mandarin is a language. Other three are famous dances.

Songkran

(b) Reason : Songkran is a festival in Asia. Other three are some famous festivals in Europe.

The plateau of Anatolia, The plateau of Iran and the plateau of Tibet are the important intermontane plateaus found in Asia.

1. In Europe, the North Western Highlands region includes the mountains and plateaus of Norway, Sweden, Finland, Scotland and Iceland. 

2. This region has the most beautiful fjord coast. 

3. It was created by glaciations in the past. 

4. This region has a lot of lakes, which serve as reservoirs for producing hydroelectricity. 

5. A fjord is a narrow and deep sea inlet between steep cliffs. 

It helps in the following ways.

• It reduces the speed of wind, irrespective of its direction. 
• The force of sea waves are also controlled. 

6. Hence, areas with fjords are best suited for natural harbours.

1. In Asia, the population is unevenly distributed because of various physical features.

2. China and India alone covers three fifth of Asia’s population.

3. River plains and industrial regions have high density of population, whereas low density is found in the interior parts of Asia.

(a) i alone is correct

1. The south, south east and eastern parts of Asia are strongly influenced by mansoon winds.

2. Summer is hot and humid. Winter is cool and dry.

3. The summer mansoon winds bring heavy rainfall to India, Bangaladesh, Indo – China, Philippines and southern China.

(c) Japan – Fishing

(a)  2, 3 ,4, 1

1. France 

2. Spain 

3. Italy 

4. Sicily

1. There are several active volcanoes found in the Alpine mountain system. Mt. Etna,Vesuvius and Mt. Stromboli are the important volcanoes. 

2. Earthquakes are common in this region. The Stromboli is called the ‘light house of the Mediterranean’.

(c) The Pennines – Italy

1. Europe is the third-most populous continent, after Asia and Africa. The population density in Europe is.34 persons / km².

2. High population density is often associated with the coalfields of Europe.

3. Other populous areas are sustained by mining, manufacturing, commerce, offering large market, labour forces and productive agriculture.

4. Monaco, Malta, San Marino, and the Netherlands are the most densely populated countries; Iceland and Norway have very low density of population

1. Iron ore : Asia has the largest deposits of iron ore in the world. China, India, Turkey, Philippines, Malaysia, Thailand, Myanmar have iron ore deposit.

2. Coal : Coal is a fossil fuel. Asia has the largest deposits of coal in the world. China and India are the largest producers of coal in Asia. 3. Petroleum : Petroleum is a mineral oil. South west Asia has the largest petroleum reserves. Saudi Arabia, Kuwait, Iran, Bahrain, Qatar and UAE are important Petroleum producing countries. Other countries are South China, Malaysia, Brunei, Indonesia, India and Russia.

4. Bauxite is found in India and Indonesia.

5. Mica is found in India

6. Tin is found in Myanmar, Thailand, Malaysia and Indonesia.

1. Major European rivers criss – cross this region and deposit their alluvium.

2. It has rich deposits of coal and iron ore.

3. Cities like Paris, Moscow and Berlin are located here.

4. Hence this region is densely populated.

1. (iv) 

2. (v) 

3. (i) 

4. (ii) 

5. (iii)

1. India, Vietnam, Cambodia, Thailand, Southern China – these regions experience Summer rainfall with dry winter. 

2. Flora of this region – Deciduous trees – Teak, Sandal wood, Bamboo 

3. Fauna of this region – Tiger, Elephant, Indian Cobra, Viper.

(a) Mt. Everest

Iceland has a very low density of population.

1. Tonle Sap lake

2. Arabia

3. Roadway

4. Cape of Good Hope

5. City of temples

6. sixth

7. Europe

8. natural harbours

9. Permutes

10. Swiss Alps

11. Volga

12. Wheat

13. London

14. primary

15. Eastern

1. (d) 

2. (a) 

3. (e)

4. (b) 

5. (c)

1. Armenian 

2. Mawsynram 

3. Dates 

4. Suez

5. Tiniklingi 

6. The Mont Blanc (4,807m) 

7. Continental type 

8. Dogger Bank 

9. 34 persons / km2 

10. Danube

The answer is prions. 

i. True

ii. False. 

Scientific name of jowar is Sorghum bicolor

iii. True

iv. True

v. False. 

The spindle shaped body of birds minimises the resistance of air while flying.

leaves of these plants do not rot in water because it is covered with waxy coating on it so that they do not get wet.

1. Water trickles off lotus leaves because it is coated with waxy covering on it. 

2. It is one of the adaptations of aquatic plants to survive in water without getting wet and rot or sink to the bottom.

1. These plants grow in water so the roots do not need to go deep down in search of water.

Their roots are not anchored in the soil.

2. So their roots are short and fibrous.

• The lateral roots of Cycas give rise to vertical branches under the soil. 
• They branch repeatedly to form dichotomously branched coral-like roots called corolloid roots. 
• It contains Blue green algae, Anabaena which helps in Nitrogen fixation.

Nostoc is found in corolloid roots of Cycas.

The skills that I have acquired are skipping, jumping, reading, writing, cycling etc.

Preprimary children are not able to read and write. They cannot dress on their own, they cannot tie shoe laces, comb their hair etc. They are dependent on their mother, teachers, and Aya for everything. Whereas a standard child can read and write, dress on his own, he can do most of the routine work independently.

Kabir should study regularly and sincerely. He should read various books on animals. He should learn to speak in public by participating in elocution competition. Also he should do the project work given by the teacher and explain it in the class to his friends. By doing all these things he will develop all the skills necessary for becoming a professor.

People of one family show similarities in physical characteristics in many ways. Some features or traits are like our grandparents, some like our parents and some like our brothers and sisters. Being bom with certain features or traits in common with the members of our family is called heredity.

The following skill mentioned below which she is learning today will be of help to Suman: The skill of cooking meals, writing down the recipe, keeping an account of the money spent, making the list of grocery item needed, serving food, packing food, cleaning the table etc. are some of the few skills which will help her to run a restaurant in future.

Correct option is (c) excellent

Correct option is (c) interest, (a) efforts

1. True 

2. False 

3. False 

4. False 

5. True 

6. True