Position A:_Food enters the mouth. It is broken down by chewing and grinding. Saliva is also secreted from under the tongue to help
break down the food with enzymes.
1. Is this a mechanical digestion? Chemical digestion? Both?

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.