Grade 6 Computer Science

1. 1.A part of a computer you can pick up and touch is called hardware. What do we call the instructions the computer follows, which you cannot touch at all?

2. 2.A computer does every job in the same three stages. Which list has them in the right order?

   • a) Output, input, process
   • b) Input, process, output
   • c) Input, output, process
   • d) Process, output, input

3. 3.Match each part to the job it does.

   • Monitor
   • Keyboard
   • Speaker
   • Mouse
   • Printer

   • Shows words and pictures on a screen
   • Lets you type letters and numbers
   • Plays sound out loud
   • Puts your work onto paper
   • Moves the pointer and clicks

4. 4.Tap the monitor — the part that shows you what the computer is doing.

   Write the number of the part.

5. 5.Tap the system unit — the box that holds the processor and the memory.

   Write the number of the part.

6. 6.Which one of these is NOT hardware?

   • a) A hard disk
   • b) A word processing program
   • c) A pair of headphones
   • d) A webcam

7. 7.The processor is often called by three letters, short for central processing unit. What are the three letters?

8. 8.Hardware is a part you can pick up and touch. Software is a set of instructions. Sort each one.

   Groups: Hardware · Software

   • Mouse
   • Printer
   • Painting app
   • Operating system
   • Monitor
   • Web browser

Parts of a computer · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.Which of these is NOT an output device?

   • a) Monitor
   • b) Keyboard
   • c) Speaker
   • d) Printer

2. 2.Which of these is NOT an input device?

   • a) Scanner
   • b) Mouse
   • c) Monitor
   • d) Microphone

3. 3.A pair of headphones takes sound out of the computer and carries it to your ears. Which kind of device is it?

   • a) An input device
   • b) An output device
   • c) Neither of those
   • d) Both at once

4. 4.A projector takes a picture out of the computer and throws it onto a wall. Which kind of device is it?

   • a) An input device
   • b) Neither of those
   • c) A storage device
   • d) An output device

5. 5.An input device carries information into the computer; an output device carries it back out to you. Sort each one.

   Groups: Input device · Output device

   • Keyboard
   • Scanner
   • Speaker
   • Mouse
   • Printer
   • Monitor

6. 6.A microphone takes the sound of your voice and sends it into the computer. Which kind of device is it?

   • a) Neither of those
   • b) An input device
   • c) An output device
   • d) A storage device

7. 7.A device that carries information into the computer is called an ______ device. Fill in the missing word.

8. 8.Match each device to what it carries.

   • Microphone
   • Speaker
   • Scanner
   • Printer
   • Keyboard

   • A picture going in
   • Sound going in
   • A picture coming out
   • Letters going in
   • Sound coming out

Input and output devices · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.Put these units of information in order, smallest first.

   • Terabyte
   • Byte
   • Megabyte
   • Gigabyte
   • Kilobyte
   • Bit

2. 2.One megabyte is 1024 kilobytes. A photograph is 2 megabytes. How many kilobytes is that?

3. 3.One byte is made of 8 bits. How many bits are there in 12 bytes?

4. 4.Each letter you type takes one byte, and one byte is 8 bits. How many bits does a word of 6 letters take?

5. 5.You switch the computer off at the wall. Which memory forgets everything it was holding?

   • a) A memory card
   • b) The hard disk
   • c) A pen drive
   • d) RAM

6. 6.Primary memory works directly with the processor. Secondary storage keeps things for later. Sort each one.

   Groups: Primary memory · Secondary storage

   • Memory card
   • CD
   • RAM
   • Hard disk
   • ROM
   • Pen drive

7. 7.Which of these units is the largest?

   • a) Megabyte
   • b) Byte
   • c) Gigabyte
   • d) Kilobyte

8. 8.One kilobyte is 1024 bytes. How many bytes are there in 3 kilobytes?

Storage and memory · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "1110" as an ordinary number?

2. 2.Write the ordinary number 12 in binary, using only 0s and 1s.

3. 3.Which of these is the ordinary number 9 written in binary?

   • a) 1100
   • b) 1001
   • c) 1010
   • d) 110

4. 4.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "110" as an ordinary number?

5. 5.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "1011" as an ordinary number?

6. 6.Write the ordinary number 5 in binary, using only 0s and 1s.

7. 7.Put these binary numbers in order, smallest first.

   • 111
   • 100
   • 11
   • 10
   • 1

8. 8.How many different values can a single bit hold?

   • a) 1
   • b) 10
   • c) 8
   • d) 2

Bits and binary numbers · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.A file is saved at "Photos/Trip/beach.jpg". Write the full name of the file itself, including the part after the dot.

2. 2.A file is saved at "Music/Songs/Old/anthem.mp3". Which folder is the file sitting directly inside?

3. 3.A file is saved at "School/Science/Notes/plants.txt". Starting from the outside, how many folders must you open to reach the file?

   • a) 3
   • b) 1
   • c) 4
   • d) 2

4. 4.Sort each name by whether it is a file or a folder. A file always ends with a dot and a few letters.

   Groups: File · Folder

   • Projects
   • report.docx
   • Science
   • Downloads
   • photo.jpg
   • song.mp3

5. 5.This is a folder tree. Tap the folder that the file sums.doc is sitting directly inside.

   Write the number of the part.

6. 6.In the same folder tree, tap the outermost folder — the one that holds everything else.

   Write the number of the part.

7. 7.Match each ending to the kind of file it marks.

   • .txt
   • .jpg
   • .mp3
   • .mp4
   • .html

   • Plain writing with no formatting
   • A piece of sound
   • A photograph or picture
   • A moving video
   • A page written for a web browser

8. 8.A file is saved at "School/Science/Notes/plants.txt". Put these in the order you would open them, outermost first.

   • Science
   • School
   • plants.txt
   • Notes

Files and folders · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.Those two algorithms use the same starting number and the same two steps, but end differently. Why?

   • a) Because the steps were done in a different order
   • b) Because one of the two must be wrong
   • c) Because 4 is an even number
   • d) Because doubling is not allowed twice

2. 2.An algorithm says: start with 2, then multiply it by 5, then add 1. What number do you end with?

3. 3.Some steps just do something. Others ask a question first and go one way or the other. Sort each step.

   Groups: Just does something · Asks a question first

   • Show the answer on the screen
   • If the answer is right, say well done
   • Add 5 to the total
   • If the box is empty, fill it
   • If the total is over 20, stop
   • Double the number

4. 4.Why must every algorithm come to an end?

   • a) Because the screen would run out of room
   • b) Because computers can only hold ten steps at a time
   • c) Because a set of steps that never finishes never gives an answer
   • d) Because every algorithm must have exactly five steps

5. 5.Put these steps in the order a computer runs them to add two numbers and show the total.

   • Add the two numbers together
   • Read the two numbers
   • Show the total on the screen

6. 6.Which of these describes an algorithm best?

   • a) A picture of what a program will look like
   • b) Another name for the keyboard
   • c) A machine that runs inside the computer
   • d) A list of clear steps, in order, that finishes the job

7. 7.An algorithm says: start with 20, then halve it, then take away 3. What number do you end with?

8. 8.An algorithm says: start with 12, then halve it, then halve it. What number do you end with?

What is an algorithm? · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.A flowchart has a diamond with the question "Is the number more than 10?" written in it. What must be written on the two arrows leaving it?

   • a) Start and Stop
   • b) Two numbers
   • c) Yes on one and No on the other
   • d) Nothing at all

2. 2.Which shape marks the beginning and the end of a flowchart? Answer with the name of the shape.

3. 3.How many arrows come out of a decision symbol?

   • a) 4
   • b) 2
   • c) 3
   • d) 1

4. 4.Tap the symbol that starts and ends a flowchart.

   Write the number of the part.

5. 5.Why does a flowchart use four different shapes instead of drawing every step as a rectangle?

   • a) So the flowchart takes up less room on the page
   • b) So you can see what kind of step each one is without reading it
   • c) Because the computer refuses to read rectangles
   • d) Because each shape holds a different amount of writing

6. 6.Tap the symbol used when the flowchart has to ask a question and go one of two ways.

   Write the number of the part.

7. 7.Which shape is used in a flowchart when a question has to be asked? Answer with the name of the shape.

8. 8.Tap the symbol used to read something in or to print something out.

   Write the number of the part.

Flowchart symbols · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.A flowchart reads a number, doubles it and prints it. Put the boxes in the order they are visited.

   • Stop
   • Print the result
   • Start
   • Read the number
   • Double the number

2. 2.A flowchart reads a number. If the number is more than 10, it prints "Big". If not, it prints "Small". The number read is 7. What does the flowchart print?

3. 3.A flowchart reads a number. If the number is less than 5, it prints "Low". If not, it prints "High". The number read is 5. What does the flowchart print?

4. 4.A flowchart reads a number. If the number is more than 10, it prints "Big". If not, it prints "Small". The number read is 15. What does the flowchart print?

5. 5.A flowchart reads a number. If the number is equal to 12, it prints "Match". If not, it prints "Different". The number read is 12. What does the flowchart print?

6. 6.A flowchart reads a number. If the number is more than 20, it prints "Big". If not, it prints "Small". The number read is 44. Which arrow out of the diamond is taken?

   • a) Both of them
   • b) Neither of them
   • c) The Yes arrow
   • d) The No arrow

7. 7.A flowchart reads a number. If the number is more than 100, it prints "Over". If not, it prints "Under". The number read is 99. What does the flowchart print?

8. 8.A flowchart sets a total to 0. Each time round it adds 5 to the total, and it goes round 4 times. What is the total at the end?

Following a flowchart · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.Follow this code by hand. What is total at the end?

   total = 0
   for i in range(0, 4):
       total = total + 6

2. 2.A program sets a total to 100. It repeats this 5 times: take 20 away from the total. What is the total at the end?

3. 3.A program sets a number to 2, then doubles it three times over. Put the values the number holds in order, from the start to the end.

   • 2
   • 8
   • 4
   • 16

4. 4.Each of these starts a total at 0. Match each loop to the total it ends with.

   • Repeat 3 times: add 5
   • Repeat 4 times: add 5
   • Repeat 3 times: add 7
   • Repeat 2 times: add 9
   • Repeat 5 times: add 2

   • 21
   • 20
   • 15
   • 18
   • 10

5. 5.A program repeats this 6 times: print a star. How many stars are printed?

6. 6.A program sets a total to 0. It repeats this 3 times: add 8 to the total. What is the total at the end?

   • a) 11
   • b) 8
   • c) 3
   • d) 24

7. 7.A program sets a number to 3. It repeats this 3 times: double the number. What is the number at the end?

8. 8.A program sets a total to 0. It repeats this 3 times: add 10 to the total. What is the total at the end?

Repeating with loops · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.In a step that says "if this, do that; otherwise do the other", when does the otherwise part run?

   • a) Every single time, after the first part
   • b) Only when the condition is false
   • c) Only when the condition is true
   • d) Never — it is there for decoration

2. 2.Match each condition to the smallest whole number that makes it true.

   • More than 5
   • More than 9
   • At least 3
   • More than 0
   • At least 12

   • 1
   • 10
   • 3
   • 6
   • 12

3. 3.Is 7 more than 10?

   • a) Sometimes
   • b) There is no way to tell
   • c) Yes
   • d) No

4. 4.A program says: if the mark is at least 40, print "Pass"; otherwise print "Fail". The mark is 40. What does the program print?

5. 5.A program says: if the number is more than 10, print "Big"; otherwise print "Small". The number is 25. What does the program print?

6. 6.Sort each of these statements by whether it is true or false.

   Groups: True · False

   • 7 is equal to 7
   • 10 is less than 10
   • 8 is more than 3
   • 5 is less than 2
   • 4 is more than 4
   • 9 is more than 2

7. 7.A program says: if the mark is at least 40, print "Pass"; otherwise print "Fail". The mark is 39. What does the program print?

8. 8.A program says: if the number is more than 12, print "Over"; otherwise print "Under". The number is 12. What does the program print?

   • a) Under
   • b) Nothing at all
   • c) Over
   • d) Both words

Making decisions in programs · Grade 6 Computer Science · www.arenapublications.com/learn

1. 1.Here is a line of HTML: "<p>Hello</p>". Every element has an opening tag and a closing tag. Write the closing tag from that line.

2. 2.An element opens with the tag "<h1>". Write the tag that closes it.

3. 3.An element opens with the tag "<b>". Write the tag that closes it.

4. 4.You write an opening <b> tag and forget its closing tag altogether. What is a browser most likely to do?

   • a) Refuse to show the page at all
   • b) Add the closing tag for you in your file
   • c) Keep applying that tag to everything after it
   • d) Show the missing tag as words on the page

5. 5.Here is some HTML: "<ul><li>Tea</li><li>Milk</li><li>Sugar</li></ul>". How many items are in the list?

6. 6.In the line "<h1>Welcome</h1>", which single word will a browser show as the heading?

7. 7.Sort each tag by whether it opens an element or closes one.

   Groups: Opening tag · Closing tag

   • </h1>
   • <h1>
   • <p>
   • </p>
   • </li>
   • <li>

8. 8.Which one of these lines is written correctly, with each element closed inside the one that holds it?

   • a) <b><i>Hi</b></i>
   • b) <i>Hi<b>
   • c) <b><i>Hi</i></b>
   • d) <b>Hi</i>

Reading HTML tags · Grade 6 Computer Science · www.arenapublications.com/learn