I suppose sitting still but you may need to elaborate on your questions a little next time. Hope I offered something almost useful.
tennis burns off the most calories
Skipping burns more calories than walking or riding. This burns more calories because it is more of a full body exercise.
Just being lazy burns more calories than sleeping, which is the least amount of activity your body can generally have outside of being in a coma. Your brain burns between 5 and 25% of the total calories you burn in any 24-hour period.
Well, any activity burns calories. The easiest are probably walking, riding a bike, or swimming.If you're looking just to burn calories, go on long walks (30 minutes or more) you'd be surprised how many calories you can burn.Since everyone burns a different amount of calories based on their weight, here's a calorie calculator:http://www.prohealth.com/weightloss/tools/exercise/calculator1_2.cfm
Anything burns calories.for example sleeping for 8hours burns 616 calories.
about 2-3 calories
Yes. Most people believe that you lose calories in chewing, but it's actually the digestion process that burns calories. It is properly called a negative food. It does take more calories to eat AND digest it than it contains. but still even if it does burn calories, burning calories isn't as good as eating it! :-) (i love it!)
1500 calories burns one pound !
Yes it does
Yes, anything involved with the mind burns calories, simply because the brain burns calories and the mind is housed in the brain.
Yes Talking requires the use of muscles to move air and control it, and this requires the use of energy which burns calories. even scrathing your nose or thinking about it burns calories.
Yes. The brain burns calories when you think.