Turning Tides | Class 7 Social Science Notes
By ConceptScroll Team · Published on 17 July 2026 · 3 min read
Turning Tides – this guide gives you a concise, exam-ready overview of Turning Tides from Class 7 Social Science, written by ConceptScroll editors and reviewed against the latest NCERT textbook.
Bhāskarāchārya
Bhāskarāchārya, also known as Bhāskara II, was one of India's greatest mathematicians and astronomers, born in 1114, probably in present-day Maharashtra. Coming from a family of scholars, he authored several influential Sanskrit works including Lilāvatī, Bijaganita, and Siddhāntaśhiromani. Lilāvatī teaches basic mathematics through engaging riddles and problems, Bijaganita deals with advanced algebra, and Siddhāntaśhiromani covers advanced astronomical calculations. His works were widely studied, translated, and commented upon for centuries, influencing scholars in India and beyond, including during the Mughal period. Bhāskarāchārya's writings are notable for their clarity, examples, and poetic style, making complex concepts accessible. An example from Lilāvatī presents a problem about a herd of elephants divided into fractions engaged in various activities, illustrating his pedagogical approach. His contributions predate similar discoveries in Europe by several centuries, underscoring India's rich mathematical heritage.
📊 Diagram: Fig. 4.7 shows a 17th-century manuscript illustrating a Lilāvatī problem with a peacock perched on a pillar and a snake below, symbolizing the blend of art and mathematics.
🧪 Activity: Students are encouraged to solve the Lilāvatī elephant problem to experience Bhāskarāchārya's teaching style.
🔗 Connection: This section leads to further discussion on the motives and impact of invasions and the cultural responses of Indian kingdoms.
Frequently asked questions
1. Why are the 11th and 12th centuries seen as a period of transition in Indian history?
The 11th and 12th centuries are seen as a period of transition in Indian history because this era witnessed significant changes in political power, with the emergence of new Turkic powers that penetrated deeper into north India. This period marked the decline of earlier kingdoms and the beginning of Muslim rule in parts of India. It was also a time of cultural and economic transformation, with new administrative and military systems being introduced, and notable achievements in art, architecture
2. Which new powers emerged during this period? What were the essential features of their economic, military and administrative systems?
The new powers that emerged during the 11th and 12th centuries were primarily Turkic powers, such as the Ghaznavids and later the Ghurids. These powers introduced new military techniques including rapid cavalry attacks with archers on horseback, which were decisive in their conquests. Economically, they accumulated wealth through campaigns and booty, and administratively, they established sultanates with centralized authority under a sultan. Their administration included the use of Persian as th
3. What high accomplishments in art, architecture, literature, science, etc., do we come across during this period?
During the 11th and 12th centuries, there were significant accomplishments in various fields. In art and architecture, magnificent monuments such as the Angkor Wat temple in Cambodia were constructed. In literature and science, scholars like Bhāskarāchārya composed important works such as Lilāvati, a treatise on mathematics. The period also saw the flourishing of poets, philosophers, saints, and scientists whose works continue to be influential. These achievements reflect a vibrant cultural and
LET'S EXPLORE Observe the sketch of the Khyber Pass (Fig. 4.3). What kind of terrain does it depict? → What advantages would it offer to an army trying to reach the Indus plains? But also, what dangers? → Thinking of the caravans of traders that passed through the Khyber Pass for many centuries, let's ask the same questions about the advantages as well as dangers.
The sketch of the Khyber Pass depicts a narrow, mountainous terrain with steep slopes and a winding path through the Hindu Kush range.
Advantages for an army:
- The narrow pass allows control over movement, making it easier to defend against invaders.
- The high ground provides strategic vantage points.
Dangers for an army:
- The difficult terrain can slow down movement and make large-scale troop deployment challenging.
- The army is vulnerable to ambushes from higher elevations.
For caravan
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- बाजारों की समझ | Class 7 Social Science Notes
Clear NCERT-aligned notes on बाजारों की समझ for Class 7 Social Science.
- बाजारों की समझ | Class 7 Social Science Notes
Clear NCERT-aligned notes on बाजारों की समझ for Class 7 Social Science.
- बाजारों की समझ | Class 7 Social Science Notes
Clear NCERT-aligned notes on बाजारों की समझ for Class 7 Social Science.