Introducing Scratch
What is squeak?
A cross platform programming language
What are local variables
Variables that can be modified only by scripts belonging to the sprite in which the variable is defined
Moving things in scratch include
Rotating, changing direction, and changing location,
Sensing code blocks can do things like
detect collisions, position and keystrokes,
Where can all of the code blocks be found
In the block palette
What are costumes
An image that represents a sprite on the stage or changes the sprites appearance
What is data
A piece of information collected, stored, modified, and processed during application execution
What are the 3 most common movement blocks
move, turn left, and turn right
What are the different ways collisions are tracked
With touching color blocks, distance to color blocks, and with touching mouse code blocks,
Where do you place the code blocks
In the scripts area
What is a sprite
A two-dimensional image drawn on a transparent background, which can be moved around the stage
String
A set of characters that can be displayed within thought and speech bubbles
What code block can make a sprite face any direction instantly
Point in direction or point towards
How can you get direct user input
By using the ask code block and waiting for the user to answer
Where is your script displayed
In the stage
What is a stage
The background area on the Scratch IDE upon which sprites are displayed during application execution
what is a variable scope
The location within an application that the variable’s value can be modified
How do movement blocks move sprites
by incrementing or decrementing their coordinate values
How can mouse position be tracked
With mouse x, mouse y, and mouse down?, code blocks
Where can sprites be viewed
In the sprites list
What are Sounds
An audio file that is played within a Scratch program as s sound effect or background noise
what is a global variable
A variable that any script in an application can modify
How are a sprites coordinates retrieved and displayed
By using the x position, y position, and direction code blocks
How would you detect audio in scratch
How would you start and stop your program
With the execution buttons