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Fossils and Rocks: A Collection of 10 Rocking Questions

In this worksheet, students will answer questions on the formation of fossils from living things that have died and are trapped in rock.

'Fossils and Rocks: A Collection of 10 Rocking Questions' worksheet

Key stage:  KS 2

Curriculum topic:  Rocks

Curriculum subtopic:  Fossils

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

A fossil is formed when a prehistoric animal or plant dies and its remains become trapped in soft rock.  This often happened in the mud and sand beneath the ancient seas.

 

Fossils

 

The rocks form around the remains of the animal or plant which is then preserved inside the rock. The animal or plant also leaves its imprint in the rock.

 

Strictly speaking a fossil has to be at least 10,000 years old. Anything less than 10,000 years old is considered by paleontologists (the cool scientists who study these things) to be young.

 

So, let's find out all about old fossils!

All rocks are hard, but some are much harder than others.

 

Can you identify the hardest rock from the list below?

 

Rock types

granite

limestone

marble

slate

Granite is a very hard rock. It is made when molten lava from volcanic eruptions cools down.

 

Granite

 

Other rocks, like sedimentary rocks, are made from layers and layers of material which has been squashed over millions of years, often at the bottom of the sea.

 

What material is sedimentary rock made of?

sea water

small particles of mud and sand

smaller rocks and plants

Fossils are formed from the remains of prehistoric animals and plants.

Which animal from this list is NOT a prehistoric animal?

sabre toothed cat

brachiosaurus

cow

woolly mammoth

The south coast of England near Lyme Regis in Dorset is known as the Jurassic Coast. Lots of important fossils have been discovered there, many of them are ammonites which have the famous spiral shape.

 

Ammonites are now extinct, but they are thought to be related to modern animals such as the octopus and nautilus and their snail-like relatives.

 

Ammonite

 

Which part of the ammonite is preserved by fossilisation?

the shell

the body

Chalk and limestone are both soft rocks.

 

Chalk

 

Marble and slate are much harder rocks which were made when rocks like limestone and chalk were squashed together for millions of years.

 

Which of these rocks is most likely to contain fossils?

Tick two answers.

chalk

limestone

marble

slate

T. Rex lived millions of years ago. Like modern animals, T. Rex would have been made up of muscles, bones and other tissues.

 

T Rex

 

Which parts of T. Rex would be preserved by fossilisation?

Tick three answers.

claws

eyes

muscle

skull

teeth

tongue

Complete this sentence:

 

Fossils are preserved remains of plants and ______________.

Is this statement true or false?

 

Fossils can be found in rocks such as granite which are formed when molten lava from volcanic eruptions cools down.

 

Erupting volcano

false

true

Complete this sentence:

 

Fossils are most likely to form in ___________ rocks.

sedimentary

igneous

Match each type of rock to the correct category.

Column A

Column B

chalk
sedimentary
marble
igneous
granite
metamorphic
  • Question 1

All rocks are hard, but some are much harder than others.

 

Can you identify the hardest rock from the list below?

 

Rock types

CORRECT ANSWER
granite
EDDIE SAYS
Granite is the hardest rock in this list.
Do you think fossils can form in hard rocks like granite?
  • Question 2

Granite is a very hard rock. It is made when molten lava from volcanic eruptions cools down.

 

Granite

 

Other rocks, like sedimentary rocks, are made from layers and layers of material which has been squashed over millions of years, often at the bottom of the sea.

 

What material is sedimentary rock made of?

CORRECT ANSWER
small particles of mud and sand
EDDIE SAYS
Sedimentary rocks were formed when layers and layers of small rock particles sank to the bottom of early oceans and seas. This process is called sedimentation. The particles that the rock is formed from are called sediment.
  • Question 3

Fossils are formed from the remains of prehistoric animals and plants.

Which animal from this list is NOT a prehistoric animal?

CORRECT ANSWER
cow
EDDIE SAYS
The domestic cow that we farm for meat and milk has only really been around for about 10,000 years. It's just a whippersnapper, as my granddad the wise old owl would say.
  • Question 4

The south coast of England near Lyme Regis in Dorset is known as the Jurassic Coast. Lots of important fossils have been discovered there, many of them are ammonites which have the famous spiral shape.

 

Ammonites are now extinct, but they are thought to be related to modern animals such as the octopus and nautilus and their snail-like relatives.

 

Ammonite

 

Which part of the ammonite is preserved by fossilisation?

CORRECT ANSWER
the shell
EDDIE SAYS
The shell is much harder than the soft, fleshy body.
When an ammonite died, bacteria and other micro-organisms would have broken down the soft parts, leaving the shell behind.
  • Question 5

Chalk and limestone are both soft rocks.

 

Chalk

 

Marble and slate are much harder rocks which were made when rocks like limestone and chalk were squashed together for millions of years.

 

Which of these rocks is most likely to contain fossils?

Tick two answers.

CORRECT ANSWER
chalk
limestone
EDDIE SAYS
Chalk and limestone are sedimentary rocks and that's where the fossils form.
Marble and slate are metamorphic rocks; they are made when sedimentary rocks are squashed under lots of pressure and at high temperatures.
What do you think would happen to any of the fossils in sedimentary rock when it changes to metamorphic rock?
  • Question 6

T. Rex lived millions of years ago. Like modern animals, T. Rex would have been made up of muscles, bones and other tissues.

 

T Rex

 

Which parts of T. Rex would be preserved by fossilisation?

Tick three answers.

CORRECT ANSWER
claws
skull
teeth
EDDIE SAYS
Remember: the hard parts of an animal, like its bones, are preserved by fossilisation. Softer parts like the eyes, tongue and muscle are usually broken down by bacteria and other micro-organisms. Very rarely, soft parts like skin do get fossilised in very special places in the world and when that happens we can learn a lot more about these incredible animals.
  • Question 7

Complete this sentence:

 

Fossils are preserved remains of plants and ______________.

CORRECT ANSWER
animals
EDDIE SAYS
Remember, fossils form when rock builds up around the remains of an animal or plant. Sometimes whole parts are preserved, at other times the animal or plant leaves an imprint in the rock.
  • Question 8

Is this statement true or false?

 

Fossils can be found in rocks such as granite which are formed when molten lava from volcanic eruptions cools down.

 

Erupting volcano

CORRECT ANSWER
false
EDDIE SAYS
Any animal or plant remains are going to be destroyed by the extremely hot molten lava which forms beneath the surface of the planet.
  • Question 9

Complete this sentence:

 

Fossils are most likely to form in ___________ rocks.

CORRECT ANSWER
sedimentary
EDDIE SAYS
Limestone, chalk and shale are good examples of sedimentary rocks.
These rocks are very soft and crumble easily. Because they are formed by rock particles building up in layers, animal and plant remains can get trapped within them and fossilised.
  • Question 10

Match each type of rock to the correct category.

CORRECT ANSWER

Column A

Column B

chalk
sedimentary
marble
metamorphic
granite
igneous
EDDIE SAYS
Chalk is a sedimentary rock. Fossils are most likely to form in sedimentary rocks like chalk.
Marble is a metamorphic rock, which means it is a transformation of existing rock types. Granite is a igneous rock, which means it is solidified from lava.
---- OR ----

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