What happens during the first step of a cast fossil forming?

minerals build up in the spaces in mold fossils

What is the most important use for a fossil?

to see which plants and animals lived at certain times

What is the main reason a petrified fossil forms?

a plants or animals cells are gradually replaced by minerals

In "Hard as Rock," what is the purpose of the three subtitles in bold print?

to help the reader find information more easily

What is the most likely reason the author asked a question in the second paragraph?

because she wants the reader to read on for the answer

What happens during the last step of sedimentary rock forming?

mud is pressed together and hardens

In the 4th paragraph, what does the word sediment mean?

mud and pieces of plants and animals

What do the minerals do to a plant or animal when they replace its cells?

they cause the plant or animal to harden

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Hard as Rock Reading Comprehension

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4th grade reading passage needed to answer the questions: "Hard as Rock: The Story of Fossils" by Marcela Finely

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Questions 9

Answers

1
What happens during the first step of a cast fossil forming?
pieces of plants and animals mix with mud
a plant or animal hardens
the cells of a plant or animal become minerals
minerals build up in the spaces in mold fossils
2
What is the most important use for a fossil?
to figure out the age of rocks around them
to give people a picture of a creature
to show how earth and its plants and animals have changed
to see which plants and animals lived at certain times
3
What is the main reason a petrified fossil forms?
a mineral fills in a hollow space in rock
a plants or animals cells are gradually replaced by minerals
a plant of animal becomes trapped in mud
a plant or animal becomes very old
4
In "Hard as Rock," what is the purpose of the three subtitles in bold print?
to explain words in the text
to help the reader find information more easily
to give the selection an exciting appearance
to give the reader an understanding of fossils
5
What is the most important use for the rock around a fossil?
to protect the fossil from danger
to hold the fossil together
to show people where the fossil comes from
to tell how old the fossil is
6
What is the most likely reason the author asked a question in the second paragraph?
because the reader should remember things about fossils
because she thinks the reader should already know
because she is trying to confuse the reader
because she wants the reader to read on for the answer
7
What happens during the last step of sedimentary rock forming?
pieces of plants and animals mix with mud
a hollow is formed
mud is pressed together and hardens
mud settles to the bottom of a body of water
8
In the 4th paragraph, what does the word sediment mean?
mud and pieces of plants and animals
body of water
plants and animals
minerals
9
What do the minerals do to a plant or animal when they replace its cells?
they bury the plant or animal in rock
they kill the plant or animal
they make the plant or animal grow faster
they cause the plant or animal to harden

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