How long ago did the dinosaurs become extinct?

is this statement TRUE OR FALSE:

"The Earth was struck by an asteroid from outer space (at the Yucatan Peninsula off Mexico). This caused massive fires, earthquakes and tsunamis, as well as dust clouds that blocked the sun, so photosynthesis was severely reduced and global climate changed. Few animals survived, and these diversified to fill the vacant niches and multiplied to repopulate the earth. The mammals and flowering plants became the dominant life forms after the last mass extinction. "

HOW OLD IS THE EARTH WE LIVE IN?

Relative Dating is:

which fossil is this?

We are in the crisis of the sixth mass extinction large amounts of valuable oxygen and release smoke and carbon dioxide resulting in global warming and climate change; illegal hunting and habitat destruction. who is the cause?

What provides evidence about the history of life on Earth, and shows how organisms change through time?

When a fossil is compared to the age of other fossils in the same layer, this is use of

This is used to represent evolutionary time

True or False: Evidence from the fossil record shows that species change gradually over time.

Eras are subdivided into these

The remains or traces of an organism preserved from the geologic past

The atmosphere in the first 2 billion years of the history of planet Earth was lacking which gas?

Most eras and many periods during the history of the planet Earth, came to an end because of ...?

Mass extinction would most likely result from which of the following events?

What type of organism evolved first based on the fossil record?

When large numbers of species die out in a short period of geologic time (2.8 million years or less) that causes ecosystems to be destroyed, what has occurred?