Sharing Pictures: Showing Our World

Learning Objectives Explain that a digital picture is made of tiny dots of color called pixels. Describe how a computer sends a picture by sending data about each pixel. Identify the three key parts of sending a message: a sender, a receiver, and the message itself. Use a simple block-based event (like 'when button is clicked') to start an action. Use a conditional statement ('if...then...') to check if a message is ready to be sent. Sequence the steps for sending a digital picture to someone. Have you ever sent a funny picture to a friend or family member? 🖼️ How does your drawing magically appear on their screen miles away? Today, we'll become digital detectives and discover how computers send pictures across the world! We'll learn that pictu...

TermDefinitionExample PixelThe smallest single dot of color on a screen. Thousands of pixels work together to make a whole picture, like a big mosaic!If you look very, very close at a screen, you might see the tiny red, green, and blue squares that make up a white area. Each one of those squares is a pixel. DataInformation that a computer can understand and use. For a picture, the data is the color and location of every single pixel.When you save a drawing, the computer saves all the color information as data so it can show the drawing again later. SenderThe person or computer who is sending the message.When you email a picture to your teacher, you are the sender. ReceiverThe person or computer who gets the message.When your teacher opens the email with your picture, they are the receiver...

The Sender-Message-Receiver Pattern Sender -> Message -> Receiver To send any digital message, you always need three parts: someone to send it (Sender), the thing being sent (Message), and someone to get it (Receiver). Without all three, the message can't be delivered. The Event-Action Pattern WHEN [event happens], DO [action]. Computers wait for something to happen (an event) before they do something (an action). We use this to tell the computer to send our picture only when we click the 'Send' button. The 'Ready to Send?' Check (Conditional) IF [condition is true], THEN [do an action]. Before sending, a good program checks if everything is ready. We use an IF/THEN rule to make sure we've chosen a picture and a receiver before the...