Dinosaur extinct PTE written summary text 65

Dinosaur extinct PTE written summary text 65

Dinosaur extinct PTE written summary text 65

Read the passage below and summarize it using one sentence. Type your response in the box at the bottom of the screen. You have 10 minutes to finish this task. Your response  judged on the quality of your writing and on how well your response presents the key points in the passage.

Summarize Written text


The end of the Cretacceous Period saw one of the most dramatic mass extinctions the Earth has even seen.

The fossil record shows that throughout their 160 million year existence, dinosaurs took on a huge variety of forms as the environment changed and new species evolved that were suited to these new conditions. Others that failed to adapt went extinct.

But then 66 million years ago, over a relatively short time, dinosaurs disappeared completely (except for birds). Many other also died out, including pterosaurs, large marine reptiles and other sea creatures such as ammonites.

Although the number of dinosaur species was already declining, this suggests a sudden catastrophic event sealed their fate, causing unfavorable changes to the environment more quickly than dinosaurs and other creatures could adapt.

The exact nature of this catastrophic event is still open to scientific debate. The catastrophe could have been an asteroid impact, volcanic eruptions or the effect of both, together with more gradual changes in the Earth’s climate over millions of years.

Whatever the causes, the huge extinction that ended the age of the dinosaur left gaps in the ecosystem that were subsequently filled by mammals and birds, allowing them to evolve rapidly.


Despite their adaptiveness to the ever-harsher changes in the environment, an unexplained apocalyptic event finally sealed the rate of the once dominant dinosaurs, which helped to create opportunities for other animals to evolve and prosper.


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