Topic: Finding Past (Dinosaurs) Grade-2 Second Term Palm Tree Campus Roots School System

1. Presented By: Grade-2
Roots School System
P a l m Tr e e C a m p u s

2. Dinosaur means "terrible lizard“.
Millions of years ago, long before there were any people, there
were dinosaurs.
Dinosaurs were one of several kinds of prehistoric reptiles that
lived during the "Age of Reptiles."

3. The oldest dinosaur types are known from
rocks in Argentina and Brazil and are about 230
million years old.

4. There were lots of different kinds of dinosaurs that lived at
different times.
• Some walked on two legs, some walked on four. Some
could do both.
• Some were speedy , and some were slow and
lumbering.
• Some were armor-plated, some had
horns, crests, spikes, or frills.
• Some had thick, bumpy skin, and some even had
primitive feathers.

5. There are many of ideas to explain a probable cause or causes.
Many factors such as given below may have contributed to this
disappearance.
• release of volcanic gases
• climatic cooling
• sea-level change
• low reproduction rates

6. Some dinosaurs ate lizards, turtles, eggs, or early mammals. Some hunted
other dinosaurs or dead animals. Most, however, ate plants but not grass.

7. THANK YOU