Which is not an idea geologists use as they study Earth? Processes in the present were the same in the past.

The rock record provides evidence of past human civilizations.

The rock record provides evidence of past geological events and life forms.

Earth is very old and has changed over time.

your answer is "the 1950's"

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

the answer is 100% density i've answered this question before and done the quiz myself.