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Understanding Fossils: A Glimpse of Earth's History

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Understanding Fossils: A Glimpse of Earth's History

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Questions and Answers

Why are bones and shells more easily fossilised compared to soft parts of animals and plants?

Soft parts of animals and plants are harder to find in the layers of rock where fossils are typically discovered.

Soft parts of animals and plants rot away when the animal or plant dies. (correct)

Bones and shells have a higher mineral content allowing for better preservation.

Bones and shells are more resistant to weathering and decay than soft parts.

Why do fossils in the deeper layers of rock provide information about the earliest forms of life?

Deep layers of rock have better preservation conditions for fossils.

The deeper layers of rock represent earlier periods in Earth's history. (correct)

Deeper layers of rock are easier to excavate, leading to more discoveries.

Deep layers of rock contain the oldest fossils.

Why are fossils considered as 'cloudy windows' according to the text?

Fossils often have a cloudy appearance due to the minerals they are composed of.

Fossils provide a clear view into the past without any distortions.

Fossils offer a limited glimpse into what life on Earth was like in the past. (correct)

Fossils are often found in cloudy or foggy regions around the world.

What advantage do palaeontologists gain by studying fossils in the higher layers of rock?

Fossils in higher layers offer insights into later forms of life on Earth. (B) Signup and view all the answers

What do the oldest rocks with no fossils suggest according to scientists?

Life did not exist on Earth at the beginning. (A) Signup and view all the answers

Why do scientists believe that new plants and animals have lived on Earth as time went by?

Because new fossils are found in each new layer of rock. (C) Signup and view all the answers

How do trees, especially old and large ones, contribute to habitats according to the text?

They provide habitats for both animals and plants. (A) Signup and view all the answers

What concept explains how the features of an animal help it survive in its habitat?

Adaptation (B) Signup and view all the answers

Why do offspring inherit characteristics from their parents?

Inheritance (A) Signup and view all the answers

Which term best describes when offspring show slight differences from their parents?

Variation (A) Signup and view all the answers

What is the process by which a new plant may vary from its parents?

Variation (D) Signup and view all the answers