Unit 2: Discovering Data
All digital devices use electricity as energy.
The earliest computers were manual (hand) or mechanical (machines). In our modern world computers use electricity to function. Computers use a language (code) to interact with humans. Instructions from humans need to be changed into an electronic calculating language using numbers. We call this the binary code.
The video to the right (top) will explain the binary code in more detail.
For a computer, each binary digit ("0", "1") is a tiny. tiny bit of electricity. Large combinations of digits (strings) can be displayed as text, images, symbols, sound or video on a computer screen.
When humans create new digital content on a computer it is called "data". Data is generally either code (instructions for the computer to do its job); this is generally called "software", and new data created by you - the user. Since all data is tiny bits of electricity it can be saved, re used and modified.
Also, groups of bits can be counted. 8 bits = 1 byte. 1000 bytes = 1 kilobyte. 1000 kilobytes = 1 megabyte. 1000 megabytes = 1 gigabyte. 1000 gigabytes = 1 terabyte and so on.
|Watch the video about BINARY CODE (top video).|
|Watch (as a class using projection technology), the "How a computer works" video. (See link to the left)|
|Watch the NinjaVideo that shows you how to use data (text, images and symbols) to create a crazy dance sequence.|
Crazy Dance sequence. Use presentation (slideshow) software like Microsoft Power point, Google Slides or WPS Presentation as shown in the Ninja Video. If you are using an iPad ask your teacher to suggest an App. You can use scissors, marker pens and paper if you do not have a computer. Once you have completed your "crazy dance" sequence test it, and ask other members of your class to follow the instructions.
|Discuss how you can find out how much data you have made in producing your collage. Clue: Locate where the file is saved. Hover your mouse pointer (Windows PC) over the file icon. iPads? Please ask your teacher.|
THE BINARY CODE (above)
HOW A COMPUTER WORKS (above)
Digital words are a part of our everyday life. After watching the videos above, play the Matching tile game below. You need to match a picture with the best word/sentence description choice.
- Recognise and explore patterns in data and represent data as pictures, symbols and diagrams.
- Collect, explore and sort data, and use digital systems to present the data creatively
- Identify and explore digital systems (hardware and software components) for a purpose.