(i) Anything that fulfills human needs can be called a resource.
(ii) Resources can be natural, man-made and human resources.

Resources once consumed can be renewed with the passage of time are called renewable resources. (e.g) Air, Water, Sunlight.

Prejudice means to judge other people in a negative or inferior manner, without knowing much about them. It happens when people have false belief and ideas.

1. Pacific Ocean
2. Atlantic Ocean

Oceans are vast expanse of water.

The feeling of oneness and unity among the people of various religions, castes of a country is called unity in diversity

(i) Pongal
(ii) Deepavali
(iii) Holi

The types of diversity are 
(i) Land forms and Lifestyle diversity
(ii) Social diversity
(iii) Religions diversity
(iv) Linguistic diversity
(v) Cultural diversity

Scholars like Dharmabalar, Jothibalar, Sumathi and Bodhi Dharamar where born in Kanchi.

(i) Sangam Valartha Nagaram
(ii) Thoonga Nagaram (the city that never sleeps).
(iii) Koodal nagar are the other names of Madurai.  

(i) Tamil Literature
(ii) Accounts of foreign travellers
(iii) Archaeological finds provide us information about the ancient town of Tamilagam.

1. Harappa
2. Mohenjo - Daro

(i) They had well covered drains.The drains were covered with slabs or bricks.
(ii) Each drain had a gentle slope so that water could flow.
(iii) Manholes were provided at regular intervals to clear the drains.
(iv) House drains passed below many lanes before finally emptying into the main : drains.
(v) Every house had its own soak pit, which collected all the sediments and allowed only the water to flow into the street drain.

Indus, civilisation is called Bronze Age civilisation because it is a historical period characterised by the use of articles made of bronze.

Archaeology is the study of pre historic humans remained materials used by pre historic humans.

(i) Go as a group and hunt the prey.
(ii) Dig a pit and trap the animals and hunt.

Modern human beings; hunting and gathering society; still used crude stone implements.

(i) Potteries
(ii) Toys
(iii) Tools
(iv) Ornaments

(i) Bones and horns of the Animals
(ii) Sharphened and crude stone weapens
(iii) Sharphened branches of trees.

(i) Tamil Nadu - Athirampakkam, Adichanallur, Paiyampalli
(ii) Karnataka - Hunasagi Valley
(iii) Mathya Pradesh - Bimbetka
(iv) Andra Pradesh - Brahmagiri

(i) The period between the use of first stone tools and the invention of writing systems is pre-history.
(ii) Stone tools, excavated materials and rock paintings are the major sources of prehistory.

(i) A naval dockyard has been discovered in Lothal in Gujarat. It shows the maritime activities of the Indus people.
(ii) Cylindrical seals similar to those found in Persian Gulf and mesopotamia have also been found in the Indus area.
(iii) This shows the trade links between these two areas.

Agriculture was one of their occupation:
(i) Granaries were used to store food grains.
(ii) The remains of wheat, barley, millets, sesame and pulses have been found there.
(iii) A granary with walls made of mud bricks, which are still in a good condition, has been discovered in Rakhigarhi, a village in Haryana, belonging to mature Harappan phase.

(i) The different forms of inequalities such as caste inequality, religious inequality, race inequality or gender inequality give rise to discrimination.
(ii) Discrimination can happen on the basis of colour, class, religion gender etc.
(iii) Treating dark-skinned people differently from fair-skinned people, giving more importance to people of higher than to those of lower caste and thinking boys are smarter than girls are all thoughts of discrimination.
(iv) Article 15(1) of the constitution states that the State not to discriminate against any citizen on grounds only of religion, race, caste, sex, place of birth or any of them.