14.1-8th grade

1.

1 point

The fossils of these extinct creatures are small, and their bodies are divided into segments.

raptor

trilobites

T-rex

wooly mammoth

2.

1 point

These small hard-shelled organisms crawled on the seafloor and sometimes swam through the __________.

3.

1 point

Trilobites are considered to be this type of fossil.

index

hard

extinct

soft

4.

1 point

______________ have been able to divide Earth's history into time units based on the life-forms that lived only during certain periods.

5.

1 point

This division of Earth's history makes up the _____________.

6.

1 point

The oldest rocks on Earth contains no ____________.

7.

1 point

Four major subdivisions of geologic time are used- eons, eras, periods, and ______.

8.

1 point

The longest subdivisions- ______- are based upon the abundance of fossils.

9.

1 point

Next to eons, the longest subdivisions are the ______, which are marked by major, striking, and worldwide changes in the types of fossils present.

10.

1 point

________ are units of geologic time characterized by the types of life existing worldwide at the time.

11.

1 point

Periods can be divided into smaller units of time called _______.

12.

1 point

The fossil record shows that ___ have changed over geologic time.

13.

1 point

This change through time is known as ___________.

14.

1 point

According to most theories about organic evolution, __________ can affect an organism's survival.

15.

1 point

Life scientists often define a _______ as a group of organisms that normally reproduce only with other members of their group.

16.

1 point

A lion and a tiger is from the same species.

True

False

17.

1 point

_____________ was a naturalist who sailed around the world from 1831 to 1836 to study biology and geology.

18.

1 point

In his book, he proposed that ____________ is a process by which organisms with characteristics that are suited to a certain environment have a better chance of surviving and reproducing than organisms that do not have these characteristics.

19.

1 point

This means that organisms compete with each other for resources necessary for life, such as ____________.

20.

1 point

Some organisms that were well suited to their _______ lived longer and had a better chance of producing offspring.

21.

1 point

What would happen if there were short necked giraffes and long neck giraffes and the only leaves were at the top of the tree.

The long neck giraffes would die

The short neck giraffes would be the only survivors

The long neck giraffes would live longer and reproduce to pass on traits

22.

1 point

Humans have long used the _________________ when breeding domestic animals.

23.

1 point

_________ explains how characteristics change and how new species arise.

24.

1 point

The term _______ comes from the structure of the animal's hard outer skeleton or exoskeleton.

25.

1 point

The ________________ of a trilobite consists of three lobes that run the length of the body.

26.

1 point

_______ inhabited Earth's oceans for more than 200 million years.

27.

1 point

Throughout the _______________, some species of trilobites became extinct and other new species evolved.

28.

1 point

Trilobites, might have been the first organisms that could view the world with complex ________.

29.

1 point

Eyes that are located toward the front of the head indicate an organism that was adapted for _____________.

30.

1 point

Over time, the _____ in trilobites changed.

31.

1 point

In many trilobite species, the eyes became progressively smaller until they completely _________.

32.

1 point

Trilobite exoskeletons changed as trilobites _______ to changing environments.

33.

1 point

___________ is one possible answer to the riddle of trilobite extinction.

34.

1 point

Earth's _______ caused continents to collide and separate many times.

35.

1 point

By the end of the Paleozoic Era, sea levels had dropped and the continents had come together to form one giant landmass, the super continent _____________.