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    3.  Which of the following is a non-visible component in MIT App Inventor?

                                   (i)  Canvas                              (ii)  Button

                                   (iii)  Pedometer                         (iv)  Image
                         4.  Identify the sensor that is used in weather apps to measure air humidity.

                                   (i)  Gyroscope                           (ii)  Hygrometer

                                   (iii)  Light Sensor                      (iv)  Proximity Sensor

                         5.  Mark the event that is triggered when the user lifts the finger from the screen.

                                   (i)  Touch Up                            (ii)  Touch Down

                                   (iii)  Touch Move                        (iv)  Click

                      B.  Write T for true and F for false.

                         1.  The Click event is triggered when the user taps an element.

                         2.  Canvas cannot detect dragging or swiping actions.

                         3.  The Accelerometer detects temperature around the device.

                         4.  The Location Sensor uses GPS to find the device’s position.

                         5.  A sensor lets an app interact with the environment.

                      C.  Fill in the blanks using the given hints:
                         1.  MIT App Inventor use colourful                instead of long codes.                Hints

                         2.  The                 sensor is used in VR apps to detect rotation and tilting.        Ball
                         3.                  is a round object that you can add to the Canvas.                    Data
                                                                                                                 Blocks
                         4.   The NFC sensor enables devices to share                when close together.
                                                                                                               Brightness
                         5.  The Light Sensor is used to adjust screen             .                           Gyroscope

                      D.  Answer the following questions:
                         1.  Why is MIT App Inventor useful?

                         2.  Explain the role of the Canvas in app development.

                         3.  Describe any two sensors.

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