Unit 0
The study of computers and algorithms, and their impact on society
is a message that is sent through the Scratch program, activating scripts with the matching hat blocks.
Broadcast
instructions written in code which can then be run by a computer.
Program
What does the orange block "wait (#) seconds" do ?
Tells the sprite to wait this many seconds before running to the next code block in the sequence
Language that can be understood by a computer.
Code
a series of still frames that are shown in rapid succession
Broadcasts are sent with the blocks
Broadcast () and Broadcast () and Wait, and are received by the hat block When I Receive ().
a programming technique in which two programmers, a driver and a
navigator, work together on one problem.
Pair Programming
What do the blue blocks "change x by ()" and "change y by ()" do?
Moves the sprites to a new position that is up/down and away from the sprite.
sets of instructions that run at the same time.
Parallelism
assigning an initial (starting) value to a variable or object.
initializing
Broadcasts are similar to which other blocks
They are similar to events, which are scripts triggered when certain actions, like mouse moves or key presses, are performed.
the programmer who controls the actions of the computer.
Driver
What is Ms. Enriquez'z favorite color?
Blue
the horizontal (x) and vertical (y) address of any point on an XY grid.
XY Coordinates
a series of instructions that follow one another in order.
Sequence
What does the "When the green flag is clicked" block do?
Event that starts the script
an action that causes something to happen.
Event
The elephant on the XY Coordinate grid is 7 squares to the right and five squares up... What is his exact coordinate written as (X,Y)
(7,5)
How did you make all four sprites dance when only one sprite was clicked?
Use the broadcast block it sends a message to all of the sprites in the program.
Horizontal lines are what on the coordinate grid
X- axis
What do the blue blocks "set x to ()" and "set y to ()" do ?
Initializes the sprite to by sending it to a starting location when the event triggers the script to start
Vertical lines are what on the coordinate grid
y - axis
The treasure box is located 9 squares to the left and 5 squares down ... what is the exact location of the treasure box written in (X,Y)
(-9,-5)
Does the timing of a wait block always need to be 0.1 seconds?
No, it does not. A wait block controls the frame rate. The faster the frame rate is, the smoother (or faster) the animation will appear.