Source: https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-8-searching-the-world-wide-web [Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [KS3](https://senecalearning.com/en-gb/revision-notes/ks3.md) › [Computer Science](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science.md) › [Computer Science: KS3](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3.md) › Searching the World Wide Web # Searching the World Wide Web Computer Science: KS3, topic 5.1.8 ## Searching the World Wide Web There is a huge amount of information on the World Wide Web. Not all information is useful and some of it is wrong. You need to know how to search well to make sure the information is high quality. ### Search engines ![Search engines](https://image-v2.cdn.app.senecalearning.com/2019-09/489c59b3-35f4-49c1-b6b8-52005e030f5f/coffee-composition-desk-262569.jpg) - Google, Bing, DuckDuckGo, and Ecosia are examples of search engines. Search engines work by searching for web pages. - Searching for web pages is called ‘crawling’. ### Searching for matching words ![Searching for matching words](https://image-v2.cdn.app.senecalearning.com/2019-09/0b707bb3-209e-4fd6-a33c-d6dbf5090822/coffee-composition-desk-262569.jpg) - When you put words into a search engine, the search engine finds a list of pages that match the words you used. - The search engine ranks (puts in order) the pages based on: - How closely your search matches the page. - The popularity of the page. ### Choosing the page you want ![Choosing the page you want](https://image-v2.cdn.app.senecalearning.com/2019-09/688c4ce1-d6a9-48b0-92d3-1b3459ca42c4/blur-close-up-connection-218717.jpg) - The page highest on the list may not be the best page for your search. ## Test yourself on Searching the World Wide Web - What do search engines search for? - What word describes searching for web pages? - Search engines rank the pages from search results, but is the highest page on the list always the best page for your search? [Practise this topic for free](https://app.senecalearning.com/classroom/course/b89946c5-cfe7-42d6-ae51-9b4631a07589/section/0d1f9266-be72-4757-992d-bbd94a2aa05e/session) - Previous topic: [5.1.7 HTML](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-7-html.md) - Next topic: [5.1.9 Good Searching Tips](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-9-good-searching-tips.md) ## Computer Science: KS3 contents ### 1 Computational Thinking & Algorithms - 1.1 Computational Thinking - [1.1.1 Abstraction Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-1-1-abstraction-thinking.md) - [1.1.2 Decomposition Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-1-2-decomposition-thinking.md) - [1.1.3 Algorithmic Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-1-3-algorithmic-thinking.md) - 1.2 Algorithms - [1.2.1 Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-1-algorithms.md) - [1.2.2 Pseudocode](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-2-pseudocode.md) - [1.2.3 Flow Diagrams](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-3-flow-diagrams.md) - [1.2.4 Logical Reasoning & Debugging](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-4-logical-reasoning-and-debugging.md) - [1.2.5 Reading Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-5-reading-algorithms.md) - [1.2.6 Correcting Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-6-correcting-algorithms.md) - [1.2.7 Complete the Algorithm](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-7-complete-the-algorithm.md) - [1.2.8 Search Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-8-search-algorithms.md) - [1.2.9 Linear Search](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-9-linear-search.md) - [1.2.10 Binary Search](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-10-binary-search.md) - [1.2.11 Sort Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-11-sort-algorithms.md) - [1.2.12 Bubble Sort](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-12-bubble-sort.md) - [1.2.13 Insertion Sort](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-13-insertion-sort.md) - [1.2.14 End of Topic Test - Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-14-end-of-topic-test-algorithms.md) ### 2 Programming - 2.1 Programming Fundamentals - [2.1.1 Variables & Constants](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-1-variables-and-constants.md) - [2.1.2 Comments](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-2-comments.md) - [2.1.3 Input & Output](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-3-input-and-output.md) - [2.1.4 Arithmetic Operators](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-4-arithmetic-operators.md) - [2.1.5 Relational Operators](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-5-relational-operators.md) - [2.1.6 Boolean Operators](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-6-boolean-operators.md) - [2.1.7 Sequence](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-7-sequence.md) - [2.1.8 Selection](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-8-selection.md) - [2.1.9 Iteration](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-9-iteration.md) - [2.1.10 Subroutines](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-10-subroutines.md) - [2.1.11 Scope](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-11-scope.md) - [2.1.12 Data Types](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-12-data-types.md) - [2.1.13 Casting](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-13-casting.md) - [2.1.14 Arrays](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-14-arrays.md) - [2.1.15 2D Arrays](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-15-2d-arrays.md) - [2.1.16 Lists](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-16-lists.md) - [2.1.17 2D Lists](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-17-2d-lists.md) - [2.1.18 Strings](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-18-strings.md) - [2.1.19 Syntax Errors](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-19-syntax-errors.md) - [2.1.20 Logic Errors](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-20-logic-errors.md) - [2.1.21 Runtime Errors](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-21-runtime-errors.md) - [2.1.22 End of Topic Test - Programming](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-22-end-of-topic-test-programming.md) - 2.2 Designing Code - [2.2.1 Code](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-1-code.md) - [2.2.2 Programs](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-2-programs.md) - [2.2.3 Writing Your Own Program](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-3-writing-your-own-program.md) - [2.2.4 Designing a ‘Basketball’ Game](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-4-designing-a-basketball-game.md) - [2.2.5 Turning an Algorithm into an App](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-5-turning-an-algorithm-into-an-app.md) - [2.2.6 End of Topic Test - Designing Code](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-6-end-of-topic-test-designing-code.md) - 2.3 Python - [2.3.1 Introduction to Python](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-1-introduction-to-python.md) - [2.3.2 Input](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-2-input.md) - [2.3.3 Output](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-3-output.md) - [2.3.4 Casting](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-4-casting.md) - [2.3.5 Type Coercion](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-5-type-coercion.md) - [2.3.6 Selection](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-6-selection.md) - [2.3.7 Iteration](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-7-iteration.md) - [2.3.8 Files](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-8-files.md) - [2.3.9 File Handling](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-9-file-handling.md) - [2.3.10 Identifiers](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-10-identifiers.md) - [2.3.11 Whitespace](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-11-whitespace.md) - [2.3.12 Comments](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-12-comments.md) - [2.3.13 Exceptions](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-13-exceptions.md) ### 3 Hardware & Software - 3.1 Hardware - [3.1.1 Elements of Computer Systems](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-1-elements-of-computer-systems.md) - [3.1.2 Central Processing Unit (CPU)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-2-central-processing-unit-cpu.md) - [3.1.3 Registers of the Central Processing Unit (CPU)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-3-registers-of-the-central-processing-unit-cpu.md) - [3.1.4 Factors Affecting CPU Performance](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-4-factors-affecting-cpu-performance.md) - [3.1.5 Fetch-Decode-Execute Cycle](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-5-fetch-decode-execute-cycle.md) - [3.1.6 Binary Systems](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-6-binary-systems.md) - [3.1.7 Logic Circuits](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-7-logic-circuits.md) - [3.1.8 Boolean Logic](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-8-boolean-logic.md) - [3.1.9 End of Topic Test - Logic](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-9-end-of-topic-test-logic.md) - 3.2 Software - [3.2.1 System Software](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-2-1-system-software.md) ### 4 Data - 4.1 Representing Data - [4.1.1 Binary](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-1-binary.md) - [4.1.2 Converting Binary & Hexadecimal](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-2-converting-binary-and-hexadecimal.md) - [4.1.3 Converting Denary & Hexadecimal](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-3-converting-denary-and-hexadecimal.md) - [4.1.4 Binary Arithmetic](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-4-binary-arithmetic.md) - [4.1.5 Representing Sound](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-5-representing-sound.md) - [4.1.6 Representing Images](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-6-representing-images.md) - [4.1.7 Character Sets](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-7-character-sets.md) - [4.1.8 American Standard Code for Information Interchange](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-8-american-standard-code-for-information-interchange.md) - [4.1.9 Unicode](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-9-unicode.md) - [4.1.10 End of Topic Test - Representation](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-10-end-of-topic-test-representation.md) ### 5 The Internet - 5.1 Networks - [5.1.1 Networks](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-1-networks.md) - [5.1.2 Geographical Classification of Networks](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-2-geographical-classification-of-networks.md) - [5.1.3 What is the Internet?](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-3-what-is-the-internet.md) - [5.1.4 The World Wide Web](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-4-the-world-wide-web.md) - [5.1.5 Uniform Resource Locators (URLs)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-5-uniform-resource-locators-urls.md) - [5.1.6 Web Hosting](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-6-web-hosting.md) - [5.1.7 HTML](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-7-html.md) - [5.1.8 Searching the World Wide Web](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-8-searching-the-world-wide-web.md) - [5.1.9 Good Searching Tips](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-9-good-searching-tips.md) - [5.1.10 Are You Looking at Reliable Information?](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-10-are-you-looking-at-reliable-information.md) ### 6 Online Safety & Security - 6.1 Protecting Yourself Online - [6.1.1 Digital Footprints](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-1-digital-footprints.md) - [6.1.2 Leaving a Safe Online Footprint](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-2-leaving-a-safe-online-footprint.md) - [6.1.3 Online Safety](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-3-online-safety.md) - [6.1.4 Malware - Viruses](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-4-malware-viruses.md) - [6.1.5 Malware](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-5-malware.md) - [6.1.6 People Online](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-6-people-online.md) - [6.1.7 Your Feelings](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-7-your-feelings.md) - [6.1.8 Getting Help](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-8-getting-help.md) - 6.2 Computing and the Law - [6.2.1 Data Protection Act (1998)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-1-data-protection-act-1998.md) - [6.2.2 Computer Misuse Act (1990)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-2-computer-misuse-act-1990.md) - [6.2.3 Freedom of Information Act (2000)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-3-freedom-of-information-act-2000.md) - [6.2.4 Plagiarism](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-4-plagiarism.md) - [6.2.5 Copyright](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-5-copyright.md) - [6.2.6 Copyright Designs and Patents Act (1988)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-6-copyright-designs-and-patents-act-1988.md) - [6.2.7 Creative Commons Licensing](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-7-creative-commons-licensing.md)