The difference between baking soda and baking powder

I'm not even going to try to put this into my own words....there's a whole lotta science going on.
Here's the difference between baking soda and baking powder as found on Answer.com:

Both baking soda and baking powder are leavening agents, which means they are added to baked goods before cooking to produce carbon dioxide and cause them to 'rise'. Baking powder contains baking soda, but the two substances are used under different conditions.
Baking Soda
Baking soda is pure sodium bicarbonate. When baking soda is combined with moisture and an acidic ingredient (e.g., yogurt, chocolate, buttermilk, honey), the resulting chemical reaction produces bubbles of carbon dioxide that expand under oven temperatures, causing baked goods to rise. The reaction begins immediately upon mixing the ingredients, so you need to bake recipes which call for baking soda immediately, or else they will fall flat!
Baking Powder
Baking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar), and also a drying agent (usually starch). Baking powder is available as single-acting baking powder and as double-acting baking powder. Single-acting powders are activated by moisture, so you must bake recipes which include this product immediately after mixing. Double-acting powders react in two phases and can stand for a while before baking. With double-acting powder, some gas is released at room temperature when the powder is added to dough, but the majority of the gas is released after the temperature of the dough increases in the oven.

"I seen that" is never, ever, ever an acceptable sentence

The first time I remember hearing this sentence was while working in a certain city....where I heard it a LOT.  These were college educated people working in a business setting.  I stopped trying to correct anyone because they all seemed to have forgotten what they learned in school and just gave me blank stares.  (I suppose it was also because it's kinda bitchy to correct people's grammar all the time!)

I left that job several years ago and the offensive sentence seems to have followed me.  There was even an instance that my own husband seemed to have uttered these words although he swears we just didn't hear the 'have', as in 'I have seen that'.  It's still up for debate. 

You are welcome to use the phrases "I have seen..." or "I had seen...", but do NOT under any circumstances leave out these verbs.  Seen is the past participle of the word See.   The past participle is used generally as an adjective describing a finished action.   The word Seen NEEDS its verb!  I don't require that you remember all of the rules, just that you say it correctly to save me from the evil chills that run down my spine when the wrong words are uttered.

The difference between its and it's

This is the first of what I'll refer to as the 'apostrophe posts'.  There are three, specifically that I need to address, though I'm sure more will arise as I ponder it.

So lets start with the shortest one. Its or It's.
Its is the possessive form of the word It. Now this one may be a tiny bit more confusing because virtually every other word in the English language uses the 's to indicate the possessive. 
It's is the abbreviation of It is or It has.  The rule is that if you can replace the word with "it is" or "it has," use it's. Otherwise, it's always its.

Petite clothing sizes are about height not weight

This one has always bothered me, but even more so lately after hearing a certain weight loss commercial on the radio.  The woman in the ad says that after losing weight she was shopping in a department store and the saleswoman told her she belonged in the petite department.  First of all, I hope the newly skinny woman wasn't too tall, because nothing there would fit her.  Secondly, I hope the salesgirl gets fired for being an idiot.

The word petite itself does mean small and delicately built.  However, petite clothing sizes are for women 5'3" or shorter and do not take into account the weight of the wearer. 

Trust me.  I'm fat AND petite...I know what I'm talking about!!