Yes they were.
prehistoric times, (when dinosaurs were alive)
Dinosaurs were extinct 65 million years ago. Dinosaurs were on Earth for 180 million years, but dinosaurs are still here but as birds.
it was around when the dinosaurs were on the earth alive
There were thousands of super volcanoes, Earth was only just still forming while the dinosaurs were around.
No dinosaurs are not still alive there are some relatives of dinosaurs that have been alive since dinosaurs like alligators and crocodiles even tigers and elephants.
Crocodile it has been alive since the dinosaurs
In the sense that birds are dinosaurs, and thus that dinosaurs are still alive, yes. However they were not alive when non-avian dinosaurs were around. Parrots did not evolve until a few million years after non-avian dinosaurs died out.
Some of the earth's atmosphere was made from volcanic eruptions in the past and also when a comet struck earth like when the dinosaurs were alive it cooled down the planet.
Dinosaurs existed at the very beginning of earth that we know of. They are extinct, so they are not really alive to this day. But you can find sculptures of dinosaurs in the museum. Check for some around you and the people there will help you with any questions you have.
yes, cavemen were alive.
Most common types of ferns, and several of the conifers were growing on earth at the time of the dinosaurs.
no there are not