When?

Dinosaurs first appeared on Earth about 200 million years ago, until their extinction about 65 million years ago.

theory 1 : volcanos started erupting a lot and all the gas in the atmosphere could've trapped a lot of heat, making it too hot or all the eruptions caused ash to fill the atmosphere blocking the sun.

how?

theory 2: An asteroid 6 to 10 miles wide hit earth, causing dense clouds of dust all over the world blocking out the sun.

Dinosaur Food

Dinosaurs that only eat plants are called herbivores, and have flat teeth like this --->

Dinosaurs that only eat meat are called carnivores and have sharp teeth that look like this ----->

Meet the dinosaurs

MEAT EATERS

Tyranosaurus rex (tie-ran-oh-sore-us-rex)

T-Rex was 40 feet long and weighed 7.5 tons!