How would flip an element upside down?

scaleY(-1)

What is the typical frame rate for web videos?

30 FPS

What will the total width of divs be based on this rule set?

div { width:600px; padding:40px; border: solid thin #000000; box-sizing:border-box; }

600px

What does preload="none" do to the <audio> tag?

The browser will not load anything until clicked.

Which prefix represents the Firefox browser?

-moz-

What will the declaration below do to its target?

animation-direction: reverse;

The animation steps will play backward.

What is the purpose of the property, transition-timing-function?

It changes the speed at different stages of the transition.

What does the column-span property do?

let an element go across all columns