science 7th grade 2nd semester

A geologist sees this folded rock when studying in the field. He is drawn to the sample that is labeled A. He determines this formation was caused by compression. What type of landform did he find at label A? anticline syncline plateau fault-block mountain

A

Study the image. Which feature is modeled in the diagram? A convergent boundary is formed. Two plates are forming a divergent boundary. Continental plates are sliding past each other. Several mid-ocean ridges are formed on Earth's surface.

A

The San Andreas Fault is the boundary between two of Earth's tectonic plates: the Pacific Plate and the North American Plate. This boundary is a transform boundary. The Pacific Plate is moving to the north and west, while the North American Plate is moving to the south and east. What type of stress is most likely to occur at this boundary? shearing syncline tension compression

A

The hydrosphere refers to the total amount of water on Earth, including liquid, gas, and solid forms. Which is one way the hydrosphere has been impacted by the movement of the continents over time? Glaciers that once covered South Africa have melted and can no longer form. All of the continents have fewer coastal areas than they did millions of years ago. Land masses near the equator have more glaciers now than they did millions of years ago. The poles that were once covered by glaciers are now surrounded by warm, tropical waters.

A

Which statements describe reverse faults? Check all that apply. The hanging wall moves up. The hanging wall moves down. The fault is at an angle. The fault is caused by compression. The fault is caused by tension. The plates are colliding. The plates are moving away from each other.

A,C,D,F

What first caused people to consider that the continents were once one large landmass? glacier evidence in warmer countries continents looked like they fit together studying the valleys of the ocean floor similar fossils were found on many continents

B

A plate moves south at a rate of 2 cm/year. How many meters south from its original location will the plate be in 4,000 years? 8,000 meters south 4,000 meters south 200 meters south 80 meters south

D

A geologist discovers a fault in a massive rock while out in the field. He notices that the fault occurs at an angle and that the hanging wall has moved downward from the footwall. What type of fault has the geologist found? normal fault reverse fault divergent fault strike-slip fault

a

Many earthquakes occur near mid-ocean ridges but do not destroy or form new crust. Instead, plates slip past each other. Which kind of boundary is found at these earthquake locations? transform boundary between two ocean plates transform boundary between two continental plates convergent boundary between two ocean plates convergent boundary between two continental plates

a

Study this image. Which feature forms at this plate boundary? mountains rift valleys volcanoes island chains

a

Study this map of the world. Which plate does not appear in both hemispheres? Indo-Australian African Pacific Eurasian

a

Where is a divergent boundary most likely to be found? in the ocean where plates move away from each other on land where plates slip past each other in the ocean where plates do not move on land where plates move towards each other

a

Which statement describes John Tuzo Wilson's contribution to the theory of plate tectonics? He proposed that plates carry parts of the seafloor. He theorized that pieces of Earth move for a limited time. He suggested that the asthenosphere is broken into segments. He observed seafloor cracks similar to existing cracks in the continents.

a

Which statement describes the process of subduction? Convection currents cause two plates to move away from each other. A plate slides beneath another plate due to convection currents and gravity. Materials are heated and transferred within Earth's interior by density. Heat cycles in the mantle cause plates to constantly move.

b

South Africa's current climate is too warm for glaciers. According to the theory of continental drift, which statement best explains why evidence of glaciers appeared in South Africa millions of years ago? Earth was covered in glaciers millions of years ago. South Africa contained similar land features to Antarctica. South Africa was closer to the poles and has drifted to its current location. Glaciers moved southward over millions of years until they reached Antarctica.

c

Study the map. Which plate borders the Philippine Plate? African Antarctic Eurasian North American

c

What type of fault occurs when plates move past each other in opposite directions? transform fault reverse fault strike-slip fault normal fault

c

Which coastlines most closely match each other and are, therefore, used as evidence to support Wegener's theory? India and Eurasia Australia and Africa Africa and South America Australia and North America

c

A geologist is making observations from atop a small mountain. She sees two parallel faults: one directly to the east and one directly to the west. She concludes that these faults are caused by tension stretching the crust. From what type of land feature is the geologist making her observations? plateau anticline syncline fault-block mountain

d

In Wegener's view, what caused mountain ranges to form? volcanoes Earth shrinking meteorite impacts continents colliding

d

What name did Wegener give to the single large landmass composed of all continents? Eurasia Gondwanaland Laurasia Pangaea

d

Which best explains why earthquakes sometimes occur in the same locations as mid-ocean ridges and rift valleys? Plates bump as they slip past each other at convergent boundaries. Plates get stuck as they move past each other at convergent boundaries. Crust gets cracked and forms faults as plates collide along divergent plate boundaries. Faults form because crust gets cracked when plates move apart along divergent plate boundaries.

d

Which three continents contain coal fields that provide evidence for continental drift? Africa, Antarctica, and North America Eurasia, Africa, and South America Antarctica, South America, and Africa South America, North America, and Eurasia

d

Which two pieces of fossil evidence support the idea of continental drift? bacteria and petrified wood Glossopteris and bacteria Lystrosaurus and Glossopteris petrified wood and Tyrannosaurus

d

Study the image of a plate boundary. Which feature is forming? mountain rift valley earthquake island chain

not a