Earth Science 9 Weeks Exam

Question 1

A ____ can also form when two oceanic plates collide.

Accepted Answer

line of volcanoes

Question 2

The result of plate movement can be seen at ____.

Accepted Answer

plate boundaries

Question 3

The change in environments that may have occurred early in the Phanerozoic Eon may have ______.

Accepted Answer

been caused by plate tectonics

Question 4

A life-form in the Precambrian time was _____.

Accepted Answer

cyanobacteria

Question 5

The longest subdivision in geologic time is a(n) _____.

Accepted Answer

eon

Question 6

Number 1 in the rock cycle shows _________.

Accepted Answer

cooling and crystallization

Question 7

Plates move apart at ____ boundaries.

Accepted Answer

divergent

Question 8

Rapid changes can occur as tectonic plates shift. What is a result of this rapid movement?

Accepted Answer

Earthquakes

Question 9

Plates slide past one another at ____.

Accepted Answer

transform boundaries

Question 10

Toward the end of the Proterozoic eon, which of the following formed?

Accepted Answer

the first multicellular organisms

Question 11

Wegener believed that continents were assembled as part of a supercontinent ~ ____ years ago.

Accepted Answer

250 million

Question 12

Animal life in the Paleozoic Era included all of the following EXCEPT _____.

Accepted Answer

humans

Question 13

During the great Proterozoic eon, the percentage of oxygen in the atmosphere changed

Accepted Answer

3% to 20%

Question 14

Which is NOT a natural occurrence caused by the movement of tectonic plates?

Accepted Answer

Weathering

Question 15

The ____ is (are) an example of a transform boundary.

Accepted Answer

San Andreas Fault

Question 16

If all of Earth’s history took place in 1 year,January 1. Tiny organisms float in the ocean__.

Accepted Answer

February 21

Question 17

Plate tectonics may affect organic evolution because movement of plates may cause a change ___.

Accepted Answer

in environment

Question 18

A fossil plant that helps support the theory of continental drift is ____.

Accepted Answer

Glossopteris

Question 19

Bands on the seafloor show alternating magnetic orientation indicate Earth's magnetic field___.

Accepted Answer

has reversed itself in the past

Question 20

Proterozoic animals are best described by which of the following?

Accepted Answer

all soft parts and made few fossils

Question 21

Which statement is true about Phanerozoic life forms compared to earlier life forms?

Accepted Answer

All of the above

Question 22

The division of Earth's history into smaller units makes up the ____.

Accepted Answer

geologic time scale

Question 23

The East African Rift is an example of a ____.

Accepted Answer

continental rift

Question 24

Little is known about much of Earth’s early history because _____.

Accepted Answer

all of these

Question 25

The alignment of iron minerals in rocks reflects the fact that Earth's __ has reversed itself.

Accepted Answer

magnetic field

Question 26

Humans first appeared during the ____ Era.

Accepted Answer

Cenozoic

Question 27

Presence of the same ____ on several continents supports the hypothesis of continental drift.

Accepted Answer

both a and b

Question 28

Scientists observed that the continents move apart/come together a few centimeters per _.

Accepted Answer

year

Question 29

Two supercontinents, _____ and _____, had warm shallow oceans near the shores.

Accepted Answer

Rodinia, Pangaea

Question 30

The youngest rocks on the ocean floor are located ____.

Accepted Answer

at mid-ocean ridges

Question 31

Continental drift states that continents have moved ____ to their current location.

Accepted Answer

slowly

Question 32

The hypothesis that continents have slowly moved to their current locations is called ____.

Accepted Answer

continental drift

Question 33

Plates of the lithosphere float on the ____.

Accepted Answer

asthenosphere

Question 34

The Himalayan mountain range of India was formed at a ____.

Accepted Answer

convergent boundary

Question 35

This type of boundary that plates slide past each other, causes earthquakes and faults.

Accepted Answer

transform boundary

Question 36

In order to complete a convection current, the rising material must eventually ____ Earth.

Accepted Answer

sink back into

Question 37

Major changes in the environment _____.

Accepted Answer

all of the above

Question 38

How did Earth come to be spherical?

Accepted Answer

Thermal energy soften rock gravity pulled together a sphere

Question 39

The boundary between two plates moving together is called a ____.

Accepted Answer

convergent boundary

Question 40

____ are formed when two continental plates collide.

Accepted Answer

Mountain ranges

Question 41

Seafloor spreading occurs because ____.

Accepted Answer

molten material beneath Earth's crust rises to the surface

Question 42

A lack of explanation for continental drift, many scientists didn't accept that ____ existed.

Accepted Answer

Pangaea

Question 43

If all of Earth’s history taking place within 1 year, January 1. When did humans appear?

Accepted Answer

December 31

Question 44

A life-form that evolved during the _____ Era was the dinosaur.

Accepted Answer

Mesozoic

Question 45

From where did the water for Earth’s oceans come?

Accepted Answer

both a and b

Question 46

What type of energy causes volcanism and plate tectonics?

Accepted Answer

thermal energy

Question 47

Matching ____ on different continents are evidence for continental drift.

Accepted Answer

rock structures

Question 48

Which is not a way heat is transferred?

Accepted Answer

insulation

Question 49

How would an asteroid impacting Earth effect the climate?

Accepted Answer

Dust/rocks thrown in atmosphere rapidly - global cooling.

Question 50

The protocontinents shown in the figure were formed during which eon?

Accepted Answer

Archean

Question 51

Geologic time is divided into units based upon types of _____.

Accepted Answer

rocks and fossils

Question 52

The crust and upper mantle make up Earth's ____.

Accepted Answer

lithosphere

Question 53

Differences in ___ cause hot, plasticlike rock in the asthenosphere to rise toward the surface.

Accepted Answer

density

Question 54

The divisions on the geologic time scale are most like which of the following?

Accepted Answer

marking your life by the major events

Question 55

After the Sun formed, gravity _____.

Accepted Answer

pulled pieces of material together to form planets, Earth.

Question 56

Changes in the environment result in _____.

Accepted Answer

physical changes in species

Question 57

A ____ is a sensitive device used to detect magnetic fields on the seafloor.

Accepted Answer

magnetometer

Question 58

Active volcanoes are most likely to form at ____.

Accepted Answer

convergent oceanic-continental boundaries

Question 59

Process number 2 shows _______.

Accepted Answer

weathering and erosion

Question 60

While studying the ocean floor, scientists found ____ bands of magnetism.

Accepted Answer

alternating

Question 61

Why is it important to the fossil record that organisms began to develop hard parts - shells?

Accepted Answer

Hard parts fossilize more easily than soft bodies.

Question 62

Name the plate boundary between the North American Plate and the Eurasian Plate. See map below

Accepted Answer

divergent boundary

Question 63

Why do scientists hypothesize that an asteroid impact led to a mass extinction event?

Accepted Answer

Asteroid impact changed climate rapidly organisms not adapt.

Question 64

If layers of rocks are millions of years old, then which of the following is true?

Accepted Answer

Earth is very old.

Earth Science 9 Weeks Exam

Questions 66

Earth Science 9 Weeks Exam

Questions 66