3rd Grade. Ch 4 Science Study Guide-Fossils

Question 0

Define extinction

Answer 0

The death of all members of a certain group of organisms.

Question 1

Define fossil

Answer 1

The remains or traces of a living that died long ago.

Question 2

What is difference between cast, a trace, amber, and an imprint fossil.

Answer 2

A cast forms when mud or minerals later fill the mold.
A trace is the fossilized remains of a track, trail, footprint, or burrow.
An imprint are the only marks left behind such as dinosaur tracks in mud, the mud hardens and changes to rock, some imprints are of animal parts(feathers), or leaves
Amber is fossilized tree resin. Amber can preserve the whole animal.

Question 3

Most fossils are found in sedimentary rock. Why are most fossils of animal bones?

Answer 3

Because bones take longer to decay and plants rot away quickly.

Question 4

Do all animals or plants. Turn into fossils?

Answer 4

No

Question 5

Why are most plant fossils ferns?

Answer 5

Because the fern was the most common plant at one time.

Question 6

Infer means…..

Answer 6

to make a smart guess.

Question 7

How is petrified wood formed?

Answer 7

When minerals replace wood fibers of a once living tree.

Question 8

1. Does a rhinoceros and a triceratops have the same body?
2. Are they related to each other?
3. Are they the same type of animal?

Answer 8

1. Yes
2. No
3. No

Question 9

How can you use a mold fossil to make a model?

Answer 9

.

Question 10

Why are characteristics of animals that haven’t changed much over millions of years?

Answer 10

They adapt well to their environment. They have good food supplies. They are not usually hunted by animals or people.

Question 11

What can fossils of jaw bones help us to understand?

Answer 11

The size of the animal and what types of food that animal ate.