This is how dinosaurs became extinct. There are many theories.
This is the most popular theory right now. It is an astroid theory. About 65 million years ago an astroid or comet collided with earth and scientists thought that to much dust in the air would cover up the sun light and kill plants and animals. So this would be to much for the dinosaurs and they were not able to survive.
Another theory is because of volcanic activity.
A huge increase of volcanic activity was at around 65 million years ago, it would have pumped to much ash and would cover up the sun and would kill the dinosaurs.
The third reason is a severe ice age.
A severe ice age would have change temperatures and freeze a lot of earths water. The dinosaurs would not be able to live in those conditions and that would make them extinct.
Another theory is a disease killed the dinosaurs.
A very contagious and deadly disease circulated among dinosaurs forcing them to become extinct.
The last theory is earths climate changed over a log period of time.
The dinosaurs couldn't adapt to the cooler, dryer climate.
There may be more theories but one of these may be right.
This is the most popular theory right now. It is an astroid theory. About 65 million years ago an astroid or comet collided with earth and scientists thought that to much dust in the air would cover up the sun light and kill plants and animals. So this would be to much for the dinosaurs and they were not able to survive.
Another theory is because of volcanic activity.
A huge increase of volcanic activity was at around 65 million years ago, it would have pumped to much ash and would cover up the sun and would kill the dinosaurs.
The third reason is a severe ice age.
A severe ice age would have change temperatures and freeze a lot of earths water. The dinosaurs would not be able to live in those conditions and that would make them extinct.
Another theory is a disease killed the dinosaurs.
A very contagious and deadly disease circulated among dinosaurs forcing them to become extinct.
The last theory is earths climate changed over a log period of time.
The dinosaurs couldn't adapt to the cooler, dryer climate.
There may be more theories but one of these may be right.