It's (B) A catastrophic event where 90 percent of the ocean's species were lost and 70 percent of the land life was thought to go extinct.
The scientific method is the "process of experimentation" for your hypothesis. There are five steps in the scientific method they consist of: conduct research, form hypothesis, test hypothesis, record data, draw conclusion.
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The first answer is c by decomposition.
The second one is c too dunes.
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Perception of pitch and sound intensity is the cocklear
Hi,
The answer should be letter B, as H2O is a compound made of two different elements in a definite proportion.