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AICE Marine Seafloor Period 2

Total questions: 25

Worksheet time: 17mins

Name
Class
Date
1.

What are some characteristics of the mantle?

a)

Thick, viscous, hot, and flowing

b)

Thick and made of granite

c)

Thin but made with dense rock like basalt and iron

d)

Liquid metal

2.

According to the Theory of Plate Tectonics, how are plates able to move slowly relative to one another?

a)

Earthquakes

b)

Mid-ocean ridges

c)

Volcanos

d)

Convection Currents

3.

Which of the following support the theory of plate tectonics?

a)

Coastlines fit together like puzzle pieces

b)

Symmetry of the magnetic stripes found along mid-ocean ridges

c)

Geological formations matching between continents

d)

Fossils of the same species found on different contients

4.

What boundary is formed when two tectonic plates are moving away from each other?

a)

Convergent

b)

Divergent

c)

Transform

d)

Subduction

5.

What boundary is formed when two or more tectonic plates come together?

a)

Divergent

b)

Convergent

c)

Transform

d)

Subduction

6.

Which boundary occurs when two plates are moving in an antiparallel direction, creating friction?

a)

Transform

b)

Subduction

c)

Convergent

d)

Divergent

7.

Which of the follow is formed at a convergent boundary?

a)

Hydrothermal Vents

b)

Volcanos

c)

Mid-Ocean Ridges

d)

Trenches

8.

What is it called when the oceanic crust sinks under the continental crust at a convergent boundary?

a)

Trench

b)

Subduction

c)

Asthenosphere

d)

Lithosphere

9.

Which mineral makes seafloor magnetic?

a)

Magnetite

b)

Basalt

c)

Iron

d)

Metal

10.

Which of the following are the correct features of hydrothermal vents?

a)

Found along trenches, very deep, high pressure, high temperature

b)

Found along mid-ocean ridges, very deep, high pressure, low temperature

c)

Found along trenches, very deep, high pressure, low temperature

d)

Found along mid-ocean ridges, very deep, high pressure, high temperature

11.

Which of the following is the correct formation of volcanos?

a)

Formed opening in Earth's crust, hot gases and molten rock escape from surface, cools when hits warm water, and builds a volcano

b)

Formed opening in Earth's crust, cool gases and molten rock escape from surface, cools when hits cool water, and builds a volcano

c)

Formed opening in Earth's crust, cool gases and molten rock escape from surface, cools when hits warm water, and builds a volcano

d)

Formed opening in Earth's crust, hot gases and molten rock escape from surface, cools when hits cool water, and builds a volcano

12.

Which organism oxidizes hydrogen sulfide at hydrothermal vents to make glucose?

a)

Riftia

b)

Tevnia

c)

Chemosynthetic Bacteria

d)

Deep Sea Fish

13.

How does succession occur at hydrothermal vents?

a)

Tevnia, the bigger and faster growing tube worm, outcompetes Riftia, which is a slower growing tube worm

b)

Riftia, the bigger and faster growing tube worm, outcompetes Tevnia, which is a slower growing tube worm

c)

Riftia, the slow growing tube worm, outcompetes Riftia, which is a faster growing tube worm

d)

Tevnia, the slow growing tube worm, outcompetes Riftia, which is a fast growing tube worm

14.

Which minerals are forced up during hydrothermal vent formation?

a)

Iron, Copper, and Basalt

b)

Copper, Zinc, and Basalt

c)

Basalt, Zinc, and Iron

d)

Iron, Copper, and Zinc

15.

Which of the following is the correct order for hydrothermal vent formation?

a)

Cracks form, cold water seeps in, water is superheated by hot magma, minerals dissolve in the water which is then forced downwards, they solidify when they hit the cold water, produced chimneys

b)

Cracks form, warm water seeps in, water is superheated by hot magma, minerals dissolve in the water which is then forced upwards, they solidify when they hit the cold water, produced chimneys

c)

Cracks form, minerals dissolve in the water, cold water seeps in, water is superheated by hot magma, they solidify when they hit the cold water again, produced chimneys

d)

Cracks form, cold water seeps in, water is superheated by hot magma, minerals dissolve in the water which is then forced upwards, they solidify when they hit the cold water, produced chimneys

16.

Which of the following is the correct process of earthquake formation?

a)

Subduction at divergent boundary, plates get stuck, pressure increases, plate slips and releases stored energy

b)

Subduction at convergent boundary, plates get stuck, pressure decreases, plate slips and releases stored energy

c)

Subduction at convergent boundary, plates get stuck, pressure increases, plate slips and releases stored energy

d)

Plates spread apart at convergent boundary, plates get stuck, pressure increases, plate slips and releases stored energy

17.

Define tsunami

a)

Series of fast, tall ocean waves with an extremely long wavelength

b)

One extremely large ocean wave that occurs suddenly and randomly

c)

Rapid rotating water caused by conflicting currents

d)

A violent storm with violent wind and heavy rain

18.

What causes a tsunami

a)

Warm water, moist air, low pressure, and upper-level winds

b)

Large volume of water is suddenly displaced due to one of three factors an earthquake, volcano, or landslide

c)

Underwater currents that are forced to rotate by an underwater obstacles or tides

d)

Waves formed by a storm interacting shortening wave frequency causing them to join together

19.

How are abyssal plains formed?

a)

Rock is weathered and broken down from the continental shelf, these newly formed sediments deposit on the seafloor

b)

Strong underwater currents break down newly formed rocks by the mid-ocean ridge into fine sediments that flatten the seafloor

c)

Marine uplift causes minerals to build up in the ocean to later break down due to plate tectonics causing turbidity currents to settle fine sediments on the seafloor

d)

Magma forced upward about Earth's crust, solidifies creating new uneven crust, sediments are added to the seafloor by turbidity currents, they settle to form flat regions

20.

Define trench

a)

A subduction zone that causes the continental crust to sink

b)

A cave-in that is created at a divergent boundary

c)

A ditch that was used in the past for warfare

d)

Longest, narrowest, deepest part of the seafloor

21.

What is the correct process of trench formation?

a)

Convergent boundary where subduction occurs where the oceanic crust sinks under the continental crush creating a trench at the contact point

b)

Divergent boundary where the plates separate creating a growing fissure in the seafloor creating a trench at the contact point

c)

Convergent boundary where the continental crust sinks under the oceanic crust creating a trench at the contact point

d)

Transform boundary where the plate slide past one another breaking the crust causing it to cave in creating a trench at the contact point

22.

Which crust is thin but more dense because it's made from iron and basalt?

a)

Core

b)

Oceanic

c)

Continental

d)

Mantle

23.

Define mid-ocean ridge

a)

Subduction zone that forms trenches and causes earthquakes and tsunamis

b)

Cooled magma that builds up to create chimneys

c)

Marine uplift that forms a series of islands within the middle of the ocean

d)

Continuous underwater volcanic mountain range responsible for seafloor spreading

24.

What is the process of volcanos occurring at convergent boundaries?

a)

two plates separate and subduction occurs, oceanic plate is recycled and melted, magma pushes through the continental plate, volcano forms

b)

two plates collide and subduction occurs, oceanic plate is recycled and melted, magma pushes through the continental plate, volcano forms

c)

two plates separate and subduction occurs, continental plate is recycled and melted, magma pushes through the oceanic plate, volcano forms

d)

two plates collide and subduction occurs, continental plate is recycled and melted, magma pushes through the oceanic plate, volcano forms

25.

What are wave characteristics and effects from tsunamis?

a)

Slow speed, low amplitude, long wavelengths, water pulls away from shore before occurrence

b)

High speed, low amplitude, long wavelengths, water pulls away from shore before occurrence

c)

High speed, high amplitude, short wavelengths, water pulls away from shore before occurrence

d)

High speed, high amplitude, long wavelengths, water pulls away from shore before occurrence