Why a higher level of exercise burns more kcal?

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same