Answer:
The first model of the atom was developed by JJ Thomson in 1904, who thought that atoms were composed purely of negatively charged electrons. This model was known as the 'plum pudding' model.
Answer:
Crust
Explanation:
The rigid outermost layer of Earth is called the crust.
Answer:
mutation
Explanation:
we did this for science for the test last year
The answer is; B
Not all disturbances to ecosystems are undesirable. The fact, however, is that disturbance does change the structure of the ecosystem including impacting the biodiversity. The disturbance may benefit some species while it may be disadvantageous to some species. An example is that while a volcanic eruption might devastate a whole ecosystem, the recovered ecosystem after time may have an increased biodiversity than before.
