Services available on the internet:
Topics: Information retrieval, locating sites using search engines and finding people on the net;
Introduction to Internet:
Loading…Internet Protocols:
Loading…Services available on the internet:
Loading…Web Services:
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Loading…📚 1. Information Retrieval
Definition:
Information retrieval is the process of searching for and obtaining useful data or knowledge from the internet.
How it works:
- You enter a query (question or topic) into a search engine or website.
- The system scans millions of documents and web pages.
- It shows you the most relevant results based on your query.
Examples of information you can retrieve:
- Definitions and explanations (e.g., “What is photosynthesis?”)
- News articles and current events
- Educational videos and tutorials
- Research papers and e-books
Useful platforms:
- Wikipedia
- Khan Academy
- NCERT ePathshala
- YouTube (for educational content)
Why it matters:
It helps students complete assignments, prepare for exams, and explore topics beyond the textbook.
🔍 2. Locating Sites Using Search Engines
Definition:
Search engines are special websites that help users find other websites, documents, images, and videos based on keywords.
Popular search engines:
| Search Engine | Description |
|---|---|
| Most widely used, offers fast and accurate results | |
| Bing | Developed by Microsoft, includes visual search |
| Yahoo | Offers news, email, and search services |
How search engines work:
- Web Crawling: Programs called “web crawlers” scan websites and collect data.
- Indexing: The collected data is organized and stored.
- Searching: When you type a query, the engine searches its index and shows the best matches.
Tips for better searching:
- Use specific keywords (e.g., “Class 9 science notes” instead of just “science”)
- Use quotation marks for exact phrases (e.g., “Newton’s laws of motion”)
- Use filters to narrow results by date, type, or location
Why it matters:
Search engines help students quickly locate reliable websites and resources for learning.
🧑💻 3. Finding People on the Net
Definition:
The internet allows users to find and connect with people across the world for communication, collaboration, or learning.
Ways to find people:
- Social Media Platforms: Facebook, Instagram, LinkedIn
- Email Directories: Contact pages on websites
- Messaging Apps: WhatsApp, Telegram
- Professional Networks: LinkedIn for teachers, mentors, and professionals
Use cases:
- Connecting with classmates or teachers
- Joining study groups or forums
- Contacting experts for guidance
- Following educators or scientists for updates
Safety Tips:
- Never share personal information with strangers
- Use privacy settings on social media
- Report suspicious behavior or messages
📝 Summary Table
| Service | Purpose | Examples & Tools |
|---|---|---|
| Information Retrieval | To find facts, data, and knowledge | Wikipedia, Khan Academy, NCERT |
| Search Engines | To locate websites and resources | Google, Bing, Yahoo |
| Finding People | To connect with others online | Social media, email, messaging apps |
Would you like this turned into a classroom presentation or worksheet? I can also add diagrams or quiz questions to make it more interactive!