Sections 4 & 5
A computer will interpret an ".mp3" file as text, music, or photos?
music
The wall clock with minutes and seconds hands is a digital device. True or false.
False
When you travel further away from a radio tower, the signal becomes stronger. True or false.
False
What device was used to type documents before the invention of the keyboard?
typewriter
Which clock shows time continuously? An analog clock or a digital clock?
analog clock
Digital signals don't pick up _______________ as compared to analog signals which can pick up _____________ . [Hint: Answer is the same for both blank spaces].
static or random noise
The first computer keyboards were developed in what decade?
1960s
In the discussion of stopwatches, the text mentioned "hundredth of a second." In the number below, which digit is in the hundredths place?
9.854712
5
In science, a _______ is anything that carries information and can be detected.
signal
A computer will interpret a ".txt" file as text, music, or photos?
text
The seconds on a digital clock are always what type of numbers?
whole numbers
Radio noise is always present, even when you do not hear static. True or false.
True
The chapter mentions two systems of code that computer keyboards use. Name one of these systems.
Unicode and ASCII
______ ______ describes a way of sending or storing information using a quantity that can only have specific values. [Hint: Answer has two words]
digital encoding
Digital signals can be sent through what type of cables?
fiber-optic