Data Representation Lesson 1 Speed and Storage Units KS3 COMPUTING

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Presentation transcript:

Data Representation Lesson 1 Speed and Storage Units KS3 COMPUTING

Lesson Aims 1 To understand the measuring units of speed and their order 2 To understand the measuring units of storage and their order

Speed Speed units are needed to measure how fast processors are. Example A 1GHz processor can compute 1 billion instructions a second. The faster a CPU is, the more computations it can perform a second.

The base unit of speed is called a: Speed Units The base unit of speed is called a: Hertz

The next unit of speed is: Speed Units The next unit of speed is: Kilohertz 1 Kilohertz is 1024 Hertz

Megahertz Speed Speed Units The next unit of speed is: 1 Megahertz is 1024 Kilohertz

Gigahertz Speed Speed Units The final unit of speed is: 1 Gigahertz is 1024 Megahertz

Storage Storage units are needed measure how much data a device can hold. Example A 1GB USB stick can hold roughly 230 MP3s, 16 hours of music or 20 music albums. Not enough to hold a movie. The larger a storage device is, the more data is can hold.

The base unit of storage is called a: Storage Units The base unit of storage is called a: Byte

The next unit of storage is: Storage Units The next unit of storage is: Kilobytes 1 Kilobytes is 1024 Bytes

The next unit of storage is: Storage Units The next unit of storage is: Megabytes 1 Megabyte is 1024 Kilobytes

The next unit of storage is: Storage Units The next unit of storage is: Gigabytes 1 Gigabyte is 1024 Megabytes

The final unit of storage is: Storage Units The final unit of storage is: Terabytes 1 Terabyte is 1024 Gigabytes

You need to remember these, especially the order. Speed & Storage Units: Recap Speed Units hertz (Hz) Storage Units byte (B) Hertz kilohertz (KHz) Bytes kilobyte (KB) megahertz (MHz) megabyte (MB) gigahertz(GHz) gigabyte (GB) terabyte (TB) You need to remember these, especially the order.

Activity We need a phrase to remember this sequence. Bytes B BIG Kilobytes K KANGAROOS Megabytes M MAKE Gigabytes G GOOD Terabytes T TEA Title: Speed and Storage Units Your task is to create a scene to remember this phrase!

What is this? Is it measured in Hertz or Bytes? Speed and Storage Units What is this? Is it measured in Hertz or Bytes? What is a sensible amount of storage for this device? 500GB – 2TB

What is this? Is it measured in Hertz or Bytes? Speed and Storage Units What is this? Is it measured in Hertz or Bytes? What is a sensible amount of storage for this device? 1GB – 64GB

Is this processor measured in Hertz or Bytes? Speed and Storage Units Is this processor measured in Hertz or Bytes? What is a sensible speed for this device? 1GHz – 4GHz

Write the answer to these questions in your book: Speed and Storage Units: Assessment Write the answer to these questions in your book: 1 What is the base unit of speed? [1] 2 What is the base unit of storage? [1] 3 What is the speed unit beginning with M called? [1] 4 What is the speed unit beginning with G called? [1] 5 What is the storage unit beginning with K called? [1] 6 What is the storage unit beginning with T called? [1] 7 What is the second largest unit of storage? [1] 8 How many Megabytes are in a Gigabyte? [1] 9 What is the acronym I told you to help you remember the order of storage units? [2]

Complete the following work: Independent Study Complete the following work: ? PLANNER This work is due for next lesson.