The Extinction of Dinosaurs Answers

Comprehension Questions

Answer

1. When did dinosaurs disappear? 
  1. a few thousand years ago
  2. about 15 billion years ago
  3. less than 1 million years ago
  4. about 65 million years ago 

Answer

2. Because no one is sure why dinosaurs went extinct, 
  1. scientists all believe an asteroid killed them.
  2. the dinosaurs may all still be alive today.
  3. there is no chance that humans could ever go extinct.
  4. people have come up with theories to try to explain it. 

Answer

3. Based on the passage, it can be understood that 
  1. there is not enough evidence to prove the extinction theories. 
  2. scientists will definitely figure out the cause of dinosaur extinction at some point.
  3. most scientists believe the ice age theory of extinction.
  4. there are many hundreds of different extinction theories.

Answer

4. Read the following sentence: “Another theory is that a gradual change in climate occurred for thousands of years.”The word gradual means 

  1. unimportant
  2. over a long period of time 
  3. accidental
  4. related to plants

Answer

5. The main idea of this passage is 
  1. no one knows how the dinosaurs became extinct.
  2. an asteroid may have hit the Earth millions of years ago.
  3. dinosaurs could not adapt to changing temperatures.
  4. scientists are trying hard to find out why dinosaurs became extinct.

Answer

6. Explain one of the theories in the passage for what caused the extinction of dinosaurs. 

One theory is that a huge asteroid from space hit the Earth, causing the extinction of dinosaurs. Another is that an ice age began and it was too cold. Another is that a changing climate made summers too hot.

Answer

7. Based on the passage, explain what might have happened to dinosaurs if the temperatures had never changed. 

Answers will vary. Students should say either that dinosaurs would not have gone extinct or that the impact of an asteroid or some other problem would have made them go extinct at some point.

Answer

8. The question below is an incomplete sentence. Choose the answer that best completes the sentence.It became too cold on Earth, ________ dinosaurs became extinct. 

  1. because
  2. so 
  3. after
  4. but

 

 

Mammoth Fossil Found Answers

Main Idea Questions

Answer

1. The main idea of the passage is 
  1. there may be more bones hidden under the mud in California.
  2. Roger Castillo has a kind of dog called Labrador retriever.
  3. bones of a large, prehistoric animal were found in California. 
  4. the Columbian mammoth ate grass.

Answer

2. “Mammoth” as used in the title to describe the fossil means both: 
  1. huge and belonging to an animal called a mammoth. 
  2. woolly and Columbian.
  3. big and fierce.
  4. elephant-like and saber-toothed.

Answer

3. When Castillo says “it hit me,” he means 
  1. his understanding came suddenly and powerfully. 
  2. his mistaken idea caused punishment.
  3. the Labrador jumped and knocked him over.
  4. the bone bounced up at him.

Answer

4. The detail that does not contribute to the main idea of this passage is: 
  1. fossils from camels have been found in California. 
  2. the mammoth lived 10,000 to 40,000 years ago.
  3. Castillo thought he found a bone of a large dinosaur’s rib cage.
  4. Columbian mammoths were cousins of the woolly mammoths.

Answer

5. What details support the main idea of the passage? 

Main Idea Questions

Answers will vary. Details may include: Roger Castillo found the fossil near the bank of a river. The first thing he saw was tusks. The cluster of fossils were 10,000 to 40,000 years old. Other fossils found in California include camels and saber-toothed cats. Scientists hope to find other bones.

 

Maths intervention 200520

Morning

If the main maths today is a bit tricky then have a go at the information and activities on here about equivalent fractions. Its similar to the session yesterday in that, if you convert from one fraction to an equivalent one, you need to either multiply or divide both numerator and denominator by the same number. Always by the same number!

Have a go and drop a comment if you have any problems.

The Extinction of Dinosaurs Reading Comprehension

dinosaur skeleton at a museum

 

 

Dinosaurs disappeared from the Earth approximately 65 million years ago. There are many theories about what happened to them. So far, no one can prove why these powerful creatures suddenly disappeared. It may remain a mystery forever.

Some scientists believe that a huge asteroid from space hit the Earth. The impact and the heat from the asteroid could have killed the dinosaurs. Others believe that the asteroid gave off too much gas in the Earth’s atmosphere. This gas may have blocked rays from the sun. The cooler temperatures could have started an ice age. The low temperatures could have been too cold for the dinosaurs.

Another theory is that a gradual change in climate occurred for thousands of years. Scientists believe that winters became too cold. Summers became too hot for the dinosaurs to survive. Without fur or feathers, dinosaurs could not keep themselves warm in winter. They would have also had a hard time keeping cool in summer.

The truth is, we might not ever know what happened. It is a mystery.

 

Comprehension Questions

1. When did dinosaurs disappear? 
  1. a few thousand years ago
  2. about 15 billion years ago
  3. less than 1 million years ago
  4. about 65 million years ago

2. Because no one is sure why dinosaurs went extinct, 
  1. scientists all believe an asteroid killed them.
  2. the dinosaurs may all still be alive today.
  3. there is no chance that humans could ever go extinct.
  4. people have come up with theories to try to explain it.

3. Based on the passage, it can be understood that 
  1. there is not enough evidence to prove the extinction theories.
  2. scientists will definitely figure out the cause of dinosaur extinction at some point.
  3. most scientists believe the ice age theory of extinction.
  4. there are many hundreds of different extinction theories.

4. Read the following sentence: “Another theory is that a gradual change in climate occurred for thousands of years.”The word gradual means 

  1. unimportant
  2. over a long period of time
  3. accidental
  4. related to plants

5. The main idea of this passage is 
  1. no one knows how the dinosaurs became extinct.
  2. an asteroid may have hit the Earth millions of years ago.
  3. dinosaurs could not adapt to changing temperatures.
  4. scientists are trying hard to find out why dinosaurs became extinct.

6. Explain one of the theories in the passage for what caused the extinction of dinosaurs. 

7. Based on the passage, explain what might have happened to dinosaurs if the temperatures had never changed. 

8. The question below is an incomplete sentence. Choose the answer that best completes the sentence.It became too cold on Earth, ________ dinosaurs became extinct. 

  1. because
  2. so
  3. after
  4. but