Which statement is a main idea, not a detail?

Fossils are bones or other things that help us understand the past.

Long ago, people thought dinosaur bones were from elephants.

Fossils are bones or other things that help us understand the past.

Some fossils are found by accident.

From the story, you can predict that

scientists never use hammers to find fossils

no new fossils will ever be found

Scientists "learn from their mistakes." This means that when they make a mistake, they ________________.

do things differently next time.

Unit 4-lesson 3: Dinosaur Fossils

1.

Which statement is a main idea, not a detail?
- A.
  
  Long ago, people thought dinosaur bones were from elephants.
- B.
  
  Fossils are bones or other things that help us understand the past.
- C.
  
  Some fossils are found by accident.
Correct Answer
B. Fossils are bones or other things that help us understand the past.

Explanation
The main idea of a passage is the central point or theme that the author is trying to convey. In this case, the main idea is that fossils are bones or other things that help us understand the past. This statement is not providing specific details or examples like the other options, but rather it is stating the overall concept that fossils are important for understanding history.

Rate this question:
2.

From the story, you can predict that
- A.
  
  Fossils can be easily broken
- B.
  
  Scientists never use hammers to find fossils
- C.
  
  No new fossils will ever be found
Correct Answer
A. Fossils can be easily broken

Explanation
From the information provided, it can be inferred that fossils can be easily broken. This can be deduced from the fact that scientists do not use hammers to find fossils, indicating that they are fragile and require delicate handling. Additionally, the statement implies that if fossils were not easily broken, scientists would use hammers to extract them. Therefore, the answer suggests that fossils are fragile and can be easily damaged.

Rate this question:
3.

Most fossils are formed when mud or sand cover a dead animal, then over a period of time it hardens to __________.

Correct Answer
rock
stone

Explanation
When mud or sand covers a dead animal, it creates a protective layer that prevents decomposition. Over time, this layer hardens and turns into sedimentary rock. The process of sedimentation and compaction gradually transforms the mud or sand into solid rock, preserving the remains of the animal as a fossil. Therefore, the correct answer is rock. Stone is not a correct answer as it refers to a specific type of rock, typically used for construction or decorative purposes, and is not directly related to the formation of fossils.

Rate this question:

4
4.

The soft parts of an animal's body are saved when the animal's body is frozen in ______.

Correct Answer
ice

Explanation
When an animal's body is frozen in ice, the low temperature prevents the soft parts of the body from decomposing or decaying. Freezing preserves the soft tissues and organs, preventing them from breaking down and allowing them to remain intact. This is why the soft parts of an animal's body are saved when it is frozen in ice.

Rate this question:

4
5.

Scientists "learn from their mistakes." This means that when they make a mistake, they ________________.
- A.
  
  Do things the same next time.
- B.
  
  Do things differently next time.
- C.
  
  Never learn.
Correct Answer
B. Do things differently next time.

Explanation
When scientists make a mistake, they do things differently next time. This implies that scientists are open to learning and adapting from their mistakes, and they use their errors as an opportunity to improve and make better decisions in the future. By changing their approach or methodology, scientists strive to avoid repeating the same mistakes and aim to achieve more accurate and reliable results.

Rate this question:
6.

We do not know that dinosaurs have lived over much of much of the earth, because fossils have only been found in one area.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement mentioned in the question is "We do not know that dinosaurs have lived over much of the earth, because fossils have only been found in one area." The correct answer is False. This means that the statement is incorrect. The reason for this is that the fact that fossils have only been found in one area does not necessarily mean that dinosaurs did not live over much of the earth. It is possible that fossils have not been found in other areas due to various factors such as geological processes or limited exploration. Therefore, it is incorrect to conclude that dinosaurs did not live over much of the earth based solely on the limited fossil record.

Rate this question:
7.

It can be a problem when scientists find many dinosaurs in the same place because the bones can get all mixed up.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
When scientists find many dinosaurs in the same place, it can be a problem because the bones can get all mixed up. This is because the remains of multiple dinosaurs may become jumbled together, making it difficult to accurately identify and study each individual dinosaur. The mixing of bones can lead to confusion and challenges in reconstructing the anatomy and behavior of the dinosaurs. Therefore, it is true that finding many dinosaurs in the same place can pose a problem due to the potential mixing of bones.

Rate this question:
8.

Fossils tell us that
- A.
  
  Dinosaurs were usually large
- B.
  
  Dinosaurs came in all sizes
- C.
  
  Most dinosaurs were small
Correct Answer
B. Dinosaurs came in all sizes

Explanation
The answer suggests that fossils provide evidence that dinosaurs existed in a wide range of sizes. This means that there were both large and small dinosaurs, indicating a diverse range of species within the dinosaur group. Fossils have helped scientists understand the variety of sizes that dinosaurs could grow to, providing valuable insights into their biology and evolution.

Rate this question:
9.

Which of these would probably not make a good fossil?
- A.
  
  Bone
- B.
  
  Shell
- C.
  
  Skin
Correct Answer
C. Skin

Explanation
Skin would probably not make a good fossil because it is a soft tissue that decomposes relatively quickly after an organism dies. Fossils are typically formed when hard parts of an organism, such as bones or shells, are preserved over long periods of time through processes like mineralization. Skin, being soft and easily degraded, is less likely to undergo these preservation processes and therefore less likely to form a fossil.

Rate this question:
10.

Dinosaurs are
- A.
  
  Found in a jungle
- B.
  
  Extinct animals
- C.
  
  Often in zoos
Correct Answer
B. Extinct animals

Explanation
Dinosaurs are extinct animals. This means that they no longer exist on Earth. They lived millions of years ago and became extinct due to various reasons such as a catastrophic event or natural selection. Dinosaurs are not found in jungles or zoos because they are no longer alive.

Rate this question:
11.

A word that means the opposite of hardened is
- A.
  
  Softened
- B.
  
  Discovered
- C.
  
  Enjoyed
Correct Answer
A. Softened

Explanation
The word "softened" is the opposite of "hardened" as it implies the act of making something less hard or rigid. It suggests a change in texture or consistency, indicating that something has become softer or more pliable. The other options, "discovered" and "enjoyed," do not convey the opposite meaning of "hardened" and are unrelated to the concept of hardness or rigidity.

Rate this question:
12.

Sometimes fossils are found by chance. In this sentence, chance means about the same as
- A.
  
  Workers
- B.
  
  Research
- C.
  
  Luck
Correct Answer
C. Luck

Explanation
The word "chance" in this context means the same as "luck". It implies that the discovery of fossils is not planned or intentional, but rather a fortunate and unexpected occurrence.

Rate this question:
13.

Putting a dinosaur skeleton together is difficult. This means it is
- A.
  
  Fun
- B.
  
  Easy
- C.
  
  Hard
Correct Answer
C. Hard

Explanation
Putting a dinosaur skeleton together requires a lot of skill and knowledge. It involves carefully studying and analyzing the bones, understanding their anatomy, and correctly assembling them to create an accurate representation of the dinosaur. This process can be challenging and time-consuming, making it hard to accomplish.

Rate this question:
14.

A scientist is a person whose job is to
- A.
  
  Write funny stories
- B.
  
  Study things in nature
- C.
  
  Plant things on a farm
Correct Answer
B. Study things in nature

Explanation
A scientist is a person whose job is to study things in nature. This involves conducting research, making observations, and analyzing data to gain a deeper understanding of the natural world. Scientists use various methods and tools to investigate phenomena, conduct experiments, and develop theories. They aim to expand knowledge and contribute to advancements in fields such as biology, chemistry, physics, and environmental science. By studying things in nature, scientists can uncover new discoveries, solve problems, and make valuable contributions to society.

Rate this question:

Unit 4-lesson 3: Dinosaur Fossils

Which statement is a main idea, not a detail?

From the story, you can predict that

Most fossils are formed when mud or sand cover a dead animal, then over a period of time it hardens to __________.

The soft parts of an animal's body are saved when the animal's body is frozen in ______.

Scientists "learn from their mistakes." This means that when they make a mistake, they ________________.

We do not know that dinosaurs have lived over much of much of the earth, because fossils have only been found in one area.

It can be a problem when scientists find many dinosaurs in the same place because the bones can get all mixed up.

Fossils tell us that

Which of these would probably not make a good fossil?

Dinosaurs are

A word that means the opposite of hardened is

Sometimes fossils are found by chance. In this sentence, chance means about the same as

Putting a dinosaur skeleton together is difficult. This means it is

A scientist is a person whose job is to