word knowledge why did the dinosaurs disappear? open court anthology grade 2
TRANSCRIPT
1. roam rare soot erupt
2. protection imagination infection reflection
3. uncover uncertain unkind unwise
4. disappear dislike disbelief disagree
5. dinosaur for more swirl
Word Knowledge
2. Dinosaurs were so huge that they could not burrow into the ground for warmth and protection.
3. A dinosaur might have eaten plants or animals.
1. Scientists use fossils to uncover clues about dinosaurs.
1. roam rare soot erupt
2. protection imagination infection reflection
3. uncover uncertain unkind unwise
4. disappear dislike disbelief disagree
5. dinosaur for more swirl
Word Knowledge
Build Background
In “Dinosaur Fossils” you learned that scientists learn about the creatures and the climate of the Earth of long ago from
fossils.
What do you know about why dinosaurs disappeared?
Have you read any other books about the extinction of
dinosaurs?
Build BackgroundGenre: Expository Text
For many years, dinosaurs roamed the earth. Then, they died out.
What happened?Why did they disappear?
Did egg-raiding species of animals do them in?
Did a huge meteorite crash into the Earth?
Build Background
Did egg-raiding species of animals do them in?
Did a huge meteorite crash into the Earth?
This story explores several scientific theories that explain why dinosaurs
became extinct.
Build Background
Do you know what a theory is?
A theory is an idea explaining something. It is an opinion, or idea, based on facts,
but not proven.
Expository Text• Expository text gives information. It tells people
something.
• It uses facts about real events or people.
• It presents information in a clear way.
• It gives events in the order in which they happen.
• It may be organized by topics.
climate
The climate during the Ice Age was very cold.
( the normal weather conditions of a place )
moisture
We can see the moisture of dew on the grass early in
the morning.
( water or other liquid in the air or on a surface )
discovery
A new discovery gave scientists a new idea why the Earth became
so cold.
( something that is seen or found out for the first time )
“Why Did the Dinosaurs Disappear?”
Scientists have lots of theories (ideas), but we will never know for sure. You will have to decide which theory you agree with the most.
Comprehension StrategiesGood Readers…
Monitor and Clarify
STOP and reread to determine the meaning of words and more difficult
ideas or passages.
“Wait a minute! I didn’t understand that. Let me stop and reread for clarity.”
“I am confused by that. I need to clarify.
SummarizeKeep track of what you have read and
focus on important details
“At the beginning of the story…” “Then…”
Make PredictionsGuess what will happen next based on
what you have read or heard.
“I predict that ___ will happen…”
“I think ______ will happen…”