The thermal energy inside them.
The more thermal energy you put in them (e.g. by heating them), the hotter they are going to become, and the stronger the particles that they are made of are going to wobble around. This thermal random motion of particles is called 'Brownian motion'. dunno
A thermometer
Because heat makes things expand, and cold makes things contract.("'\(o.o)/"')
Red means hot because red just makes you think of hot things. Blue means cold because it represents the Winter time.
im assuming you meant to type water... this happens because heat makes things expand, whilst cold makes things contract. by putting a hot beaker in cold water, you put too much strain on the beaker because it is changing size so fast
Hot things get cooler, and cold things get warmer, because they exchange heat with their surroundings. A "cool bag", whatever that is, is apparently designed in such a way as to prevent that (probably it's insulated).
it is warm but wind makes it cold
Cold things.
No, cold things do not have heat. Heat is a form of energy that is transferred from hot objects to cold objects. Cold objects have less heat energy compared to hot objects.
a thermometer
it makes a tornado
Do bubbles last longer in hot or cold weather they last longer in cold weather because just like hot weather makes people sweat it makes the bubbles disolve
it makes it taste better and it is cold