How do catalysts affect a chemical reaction?(1 point)
Responses
provide activation energy
increase activation energy
lose activation energy
lower activation energy
lower activation energy
endothermic
light energy
Iron and oxygen combine to form iron oxide.
What happens during rusting of an iron nail?(1 point)
Responses
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Iron and sulfur combine to form iron sulfide.
Iron and oxygen combine to form iron oxide.
Sulfur and oxygen combine to form a sulfur dioxide coating.
What does the forward arrow in a chemical equation mean?(1 point)
Responses
The reaction yields something.
The reaction proceeds quickly.
The reaction is reversible.
The reaction proceeds slowly.
Which kind of reaction is photosynthesis?(1 point)
Responses
light-independent
endothermic
temperature-independent
exothermic
Photosynthesis requires which kind of energy?(1 point)
Responses
thermal energy
mechanical energy
light energy
heat energy
How do you show the group of digits that repeat in a repeating decimal?(1 point)
Responses
by putting a bar over them
by printing them in italics
by underlining them
by putting them in parentheses
by putting a bar over them
How many digits long could the repeating cycle of a repeating decimal be if the denominator of the rational number is 7?(1 point)
Responses
any finite length
up to six digits long
up to seven digits long
infinitely long
up to six digits long
Convert 0.27
to a rational number in simplest form.(1 point)
Responses
27/100
1/27
3/11
27/99
27/100
To convert 0.264 to a rational number, you would set x equal to 0.264 and then multiply both sides of the equation by what number?(1 point)
Responses
10
100
1,000
1,000
If a repeating decimal has a repeating cycle of three digits, it will convert to a rational number with what denominator? (1 point)
Responses
100
99
1,000
999
999
How many digits are in the repeating cycle of 17/27
The repeating cycle of 17/27 is 1 digit long.
What are the three main operating systems?
(1 point)
Responses
Chrome, Firefox, and Bing
Amazon, Facebook, and Apple
Microsoft, Google, and Adobe
Windows, macOS, and Linux
Windows, macOS, and Linux
Carla wants to learn more about how CPUs work. Which of these videos would be the MOST useful to her?
(1 point)
Responses
“How Input Devices Work”
“Storage Devices for Beginners”
“Computer Output Devices 101”
“Introduction to Computer Processing”
“Introduction to Computer Processing”
Which of these is an example of an input device?
(1 point)
Responses
a mouse
a screen
a printer
a 3-D printer
a mouse
Which part of the computing process occurs before storage is used?
(1 point)
Responses
input
networking
output
updating
input
What is the main difference between the earliest computers and modern computers?
(1 point)
Responses
Early computers didn’t use electricity.
Early computers were very slow.
Modern computers don’t use electricity.
Modern computers are physically larger.
Modern computers are physically larger.
Which of the following statements BEST describes a computer?
(1 point)
Responses
It is a thinking machine.
It is a mathematical machine.
It is a mechanical converter.
It is a quantum technology.
It is a mathematical machine.
Which statement is MOST accurate?
(1 point)
Responses
Faster memory is more expensive.
All kinds of memory cost the same.
Slower memory is easier to find.
In the cloud, memory is free.
Faster memory is more expensive.
Which of these is faster than RAM?
(1 point)
Responses
file paths
L caches
input devices
cloud memory
L caches
What is the MAIN advantage of solid-state drives?
(1 point)
Responses
They are very easy to fix.
They are very affordable.
They are very fast.
They are very secure.
They are very fast.
Which of these BEST describes a built-in solid-state drive?
(1 point)
Responses
an input device
an output device
a storage device
a processing device
a storage device
What is a computer’s primary memory MOSTLY used for?
(1 point)
Responses
communicating with peripherals
loading the operating system
providing short-term storage
managing the solid-state drive
providing short-term storage
Which of these is an output device?
(1 point)
Responses
a 3-D printer
a keyboard
a mouse
a camera
a 3-D printer
Which computing component is responsible for coordinating memory management?
(1 point)
Responses
the hardware
the operating system
the applications
the user
the operating system
What is the MAIN advantage of a hard drive?
(1 point)
Responses
It offers the fastest way to access data.
It doesn’t require magnetization.
It is the most secure storage method.
It is very affordable.
It is very affordable.
What is the difference between hardware and software?
(1 point)
Responses
Software is physical; hardware is not.
Hardware is physical; software is not.
Software is open-source; hardware requires a license.
Hardware is open-source; software requires a license.