CHEMISTRY: Here’s the lecture from Wednesday on covalent bonds. We’ll start Lewis structures on Friday! Questions about Science In the News? Here it is – if you saw the video on Tuesday or will see it Thursday, you’ll answer the video questions instead of doing the Science In the News. If you don’t see the video, just do a regular Science In the News for Friday. We’ll do the special topic on artificial sweeteners next week, so save that one, if you’ve already done it.