1. Data Representation Lesson 1 Speed and Storage Units KS3 COMPUTING

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

3. 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.

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

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

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

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

8. 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.

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

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

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

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

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

14. 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.

15. 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!

16. 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

17. 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

18. 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

19. 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]

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