Micro:bit Coding Assessment Overview
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Questions and Answers

What is the role of variables in a program?

  • They act as permanent values that do not change.
  • They store values that can change during program execution. (correct)
  • They can only store numbers.
  • They can only store text.

    • What happens in a selection structure when a condition evaluates to true?

  • The program will continue without executing any further code.
  • The subsequent conditions will be evaluated regardless.
  • All conditions below it will be activated.
  • The associated block of code for that condition will be executed. (correct)

    • How can multiple conditions be combined in an if statement?

  • Using the 'and' operator to ensure all conditions must be true. (correct)
  • By separating them with semicolons.
  • Only the first condition can be used.
  • Using the 'or' operator exclusively.

    • What does a light sensor measure?

    <p>Light levels and converts them into electrical signals.</p> Signup and view all the answers

    What is the purpose of Analog to Digital Conversion (ADC) in sensors?

    <p>To translate physical levels into numerical values.</p> Signup and view all the answers

    Which formula correctly converts Celsius to Fahrenheit?

    <p>°F = 1.8°C + 32</p> Signup and view all the answers

    What does setting the same radio group allow when using micro:bit devices?

    <p>Devices can communicate on the same frequency.</p> Signup and view all the answers

    What is the approximate range of the micro:bit's radio transmission?

    <p>50 centimeters.</p> Signup and view all the answers

    Study Notes

    Micro:bit Assessment Study Notes

    • Practical Assessment: Involves coding tasks using the makecode editor. Specific tasks are in OneNote.

    Variables

    • Definition: Variables store values (numbers or text) and have descriptive names.
    • Changeability: Values can alter during program execution.
    • Use: Assigned starting values, used within loops, and displayed.
    • Naming: Names should be meaningful for clear understanding.

    Selection (if/else)

    • Mechanism: Uses if/else if/else statements.
    • Execution: The first true condition activates its associated code block.
    • Conditions: Else if and else conditions skipped if a previous if/else if condition is true.
    • Evaluation: Conditions must evaluate to true or false.

    Testing Multiple Conditions

    • Method: Conditions combined in an if-statement using 'and' operator.

    Inputs

    • Function: Inputs (e.g., button presses, sensors) change program execution.
    • Impact: Inputs affect program output.
    • Listening: Programs actively listen for changes in input.

    Inputs: Sensors

    • Transformation: Transform physical phenomena (e.g., light, sound) into numerical signals.
    • Data Range: Typically 0-255 on the micro:bit.
    • Applications: Measure light level, sound intensity, etc.
    • Data Handling: Use the input library for collecting and analyzing sensor data.

    Sensing the Real World

    • Light Sensors: Convert light energy to electrical signals.
    • Analog-to-Digital Conversion (ADC): Converts physical levels to numerical values.

    Sound Levels

    • Representation: Computers represent sound levels numerically.
    • Microphone Sensitivity: Increasing wires connected to the microphone increases recorded sound wave amplitudes.

    Math

    • Sensor Data Calculations: Proficiency in numerical calculations is crucial for sensor data.
    • Celsius to Fahrenheit Conversion: Formula: °F = 1.8°C + 32

    Radio

    • Micro:bit Communication: Use to create and utilize radio channels.
    • Emulation: Employ emulators as tools.
    • OneNote: Refer to accompanying OneNote slides and tasks.

    Different Radio Channels

    • Frequency Dependence: Channels rely on distinct frequencies.
    • Frequency Alignment: Setting the same radio group makes channels use the same frequency.
    • Channel Range: Channels range from 1 to 255.

    Sending and Receiving Data

    • Channel Selection: Set the radio channel for data transmission and reception (e.g., button presses).
    • Data Display: Indicate receipt of data and show it (e.g., on-screen).

    Radio Range

    • Transmission/Reception Distance: Micro:bit radio transmission/reception approximately 50cm.

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    Quiz Team

    Description

    This quiz covers key concepts in coding using the Micro:bit platform. It includes practical assessments related to variables, selection statements, and input handling, with an emphasis on understanding their roles in program execution. Ideal for students preparing for their Micro:bit assessments.

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