In an experiment, some magnesium ribbon is weighed and its mass is recorded. it is then placed in a crucible and heated. once hot enough, it combines with oxygen to form magnesium oxide (mgo). observe the data table provided. why does the law of conservation of mass appear violated?

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

In the practice of science, this type of reasoning is used to develop explanations.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic