scratch and binary x Flashcards
which direction do you face if you put in 90 degrees
you face the east
which direction do you face if you are at a 180 degree angle
you face south
which direction do you face if you are at a -90 degree angle
you face west
which direction do you face if you are at a 0 degree angle
you face north
what folder is the loops in
control
what folder is the start buttons in
events folder
what is scratch
it’s a programming game that lets you create anything you want and share it online
what are binary numbers
the ones and zeroes used by our computer systems rather than our decimal numbers zero to nine
what do computers use instead of units, tens, hundreds and thousands
they use the power of 2 - 1,2,4,8 etc
what can 22 be made up of
a 16 a 4 and a 2
what do you put in every column you don’t need a number from
you put a 0
what is the smallest number you can represent using 8 bit binary
0
what is the largest number you can represent using 8 bit binary
225
what do all odd numbers have in common when it comes to binary
they need a one in them
what does all even numbers have in common when it comes to binary
they don’t need a one in them
how can text in a computer system be represented
by using 8 bits to represent one character
what is each character given
a unique binary code
what does ASCII stand for
American standard code of information interchange
what is ASCII used for
encoding, format for text data in computers and on the internet
how many bits are used for one ASCII character
8
apart from letter of the alphabet what is ASCII used to represent
numbers and characters
how many different characters and symbols can ASCII represent
127
what are bitmap images made up of
pixels in a grid
what does each pixel in the image contain
they contain information about the colour to be displayed
at the simplest level, what can black and white pixels be represented as
zeroes and ones
what does more pixels mean
higher resolution and better quality images
how many pixels are in a single photo
millions of pixels
how many bits can pixels store
normally 24
what would happen is you saved up every bit for every pixel
it would take up a lot of space
what does the first number always relate to
the number of white pixels
what happens if the first pixel is black
the line will begin with a zero
