| A | B |
|---|
| Rsponsive Web Design | refers to using existing techniques involving flexible grid layout, flexible images, and media and media queries nito a unified approach to web design |
| Resolution | a simple count of the number of pixels across the entire width and height of a device |
| Pixels per Inch (PPI) | a measure of screen density refers to the number of device pixels on a physical surface |
| Device Pixel | the tiniest physical unit in a display |
| Bitmap Pixel | the smallest unit of data in a raster image |
| Reference Pixel | A W3C standard based on an optical reference unit that might e twice the size of a hardware pixel. |
| Pixel Density | the number of device pixels on a physical surface |
| Viewport | the rectangular area (measured in pixels) that is viewable on a device screen |
| Fixed-width Layout | the width of teh site is bound to a certain number of pixels |
| Fluid Layout | the web design's dimensions are defined in percentages rather than pixels |
| Em Space | 1 em equals the current font size |
| Relative units | size is set in relation to surrounding elements |
| Absolute units | a specific size |
| Media Query | a CSS specification tha tallows designers to target styles based on a number of device properties |
| Scalable Vector Graphics (SVG) | Defines vector-based graphics that can be embedded directly into a Web page |
| Vector graphics | type of graphic that does not lose quality when zoomed or resized. |
