The Chain Behind the Icon: teacher key

How Apps Work, grade 7 edition, written for 7th grade. From the system that runs a phone to the server far away, follow the chain of programs behind an app and the rules about who may get one.

Read the book. Print this page for the key.

Questions and answers

1. What does an operating system do?
   • It manages a computer's resources and lets other programs run (answer)
   • It reviews apps for an app store
   • It sends ads to a phone
2. Which file packages an Android app so a device can install it?
   • TestFlight
   • An APK file (answer)
   • A privacy label
3. What can a click in web code do?
   • Remove an app from the store
   • Update the phone
   • Run code that changes a label (answer)
4. What does the word phishing mean in the pages?
   • Criminals trying to get people to open harmful links (answer)
   • A way to test early versions
   • A kind of payment
5. What can a parent do when a child asks to get an app on an iPhone?
   • Nothing
   • Approve or decline from the parent's own device (answer)
   • Ask the child's friends

Words

• developers: app makers
• JavaScript: web scripting language
• database: stored information
• phishing: tricking people
• malware: harmful software