1.
WHAT IS A DINOSAUR
A DINOSAUR IS PREHISTORIC SAURIAN REPTILE,
GENERALLY OF ENORMOUS SIZE, SMALL HEAD, VERY
LONG NECK AND TAIL, AND SHORTER FORELIMBS THAN
THE HINDLIMBS

2.
HOW LONG DID DINOSAURS LIVE
THE CRETACEOUS, THE LAST PERIOD OF THE MESOZOIC,
BEGAN ABOUT 145 MILLION YEARS AGO. THE DINOSAURS
DISAPPEARED 66 MILLION YEARS AGO, AT THE END OF
THE PERIOD

3.
THE AGE OF THE DINOSAURS WAS
DIVIDED INTO HOW MANY
PERIODS?
THIS ERA IS DIVIDED INTO THREE PERIODS: TRIASSIC,
JURASSIC AND CRETACEOUS. - IN THE TRIASSIC PERIOD
(FROM 245 TO 208 MILLION YEARS), THE DINOSAURS
AROSE FROM A GROUP CALLED THECODONTS,
APPROXIMATELY 235 MILLION YEARS AGO.

4.
TRIASSIC PERIOD
THE TRIASSIC PERIOD LASTED FROM 251 MILLION YEARS
AGO TO APPROXIMATELY 201 MILLION YEARS AGO, A
PERIOD THAT BEGINS AND ENDS WITH TWO MASS
EXTINCTION EVENTS OF SPECIES: THE PERMIAN-TRIASSIC
AND THE TRIASSIC-JURASSIC. THIS ALLOWS A MORE
PRECISE SETTING OF ITS TIME LIMITS.

5.
JURASSIC PERIOD
THE JURASSIC PERIOD (BETWEEN 199.6 AND 145.5
MILLION YEARS AGO) WAS CHARACTERIZED BY A HOT,
HUMID CLIMATE THAT GAVE RISE TO LUSH VEGETATION
AND ABUNDANT LIFE. A HOST OF NEW DINOSAURS
EMERGED IN GREAT NUMBERS.

6.
CRETACEOUS PERIOD
THE CRETACEOUS IS A GEOLOGICAL PERIOD THAT LASTED
APPROXIMATELY 79 MILLION YEARS, BEGINNING 145 MILLION
YEARS AGO AND ENDING 66 MILLION YEARS AGO, WHEN THE
IMPACT OF A METEORITE ON WHAT IS NOW THE YUCATAN
PENINSULA CAUSED THE EXTINCTION OF THE DINOSAURS.