Question

1. which event wiped out 95% of animal species in the oceans? when did this occur? 8. what may have caused the mass extinction that killed the dinosaurs

Explanation:

1. The Permian - Triassic extinction event, about 252 million years ago, wiped out about 95% of marine animal species.
2. The most widely - accepted cause for the extinction of dinosaurs is the impact of a large asteroid or comet on Earth, the Chicxulub impact, which occurred about 66 million years ago. It led to massive climate change, blocking sunlight and disrupting ecosystems.

Answer:

1. The Permian - Triassic extinction event, about 252 million years ago.
2. An asteroid or comet impact (Chicxulub impact), about 66 million years ago.