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SCI B 8-41
| Question | Answer |
|---|---|
| An underwater part of a continent that extends under shallow water from the edge of the land down to a steeper slope | continental shelf |
| A supercontinent that means "all land" that existed about 200 million years ago. | Pangaea |
| What is the name of the individual who believed that of the earth's continents were joined into one continent called "Pangaea"? | Alfred Wegener |
| Wegener proposed an idea about the breaking of the Earth's crust and upper mantle into enormous slabs is called _____. | the theory of plate tectonics |
| The earth's crust and upper mantle are broken into enormous slabs called _____ or _____. | plates , tectonic plates |
| The thin outermost, solid layer of the Earth is called the _____. | crust |
| The _____ is the middle layer of Earth between the crust and the core. | mantle |
| Scientists believe that _____, or slow plastic movements in the mantle, cause the plates to move across the Earth's surface. | currents |
| Plates interact in three ways | 1) they can come together 2) they can move apart 3) they can slide past one another |
| Places where the plates interact are called _____. | plate boundaries |
| _____ and _____ occur along plate boundaries. | Earthquakes , volcanoes |
| Hot molten rock deep inside the earth | magma |
| The space around a manet within which the force of the magnet is exerted. | magnetic field |
| The switching or changing of the Earth's magnetic poles such that the North magnetic pole becomes located at the South magnetic pole's position or vice versa. | magnetic reversal |
| A chain of mountains under the ocean. | mid-ocean ridge |
| A _____ is one of the slabs that make up the Earth's crust and upper mantle; also called a tectonic plate. | plate |
| A place where the plates that make up the Earth's crust and upper mantle either move together or apart or else move past one another. | plate boundary |
| The process by which new ocean floor is continually being formed as magma rises to the surface and hardens into rock. | sea-floor spreading |
| Stand for sound navigation and ranging | SONAR |
| Descibe the process of sea-floor spreading. | 1) magma bubbles up and flows along the ridge 2) magma hardens and forms new rock 3) new rock pushes old rock out forming a new sea floor |
| A _____ is generated by movement in the generated movement in the Earth's outer core containing nickel and iron. | magnetic field |
| _____ of iron particles found in sea-floor rocks are results from reversal of the magnetic fields. | Patterns |
| How would a team of archaeologists determine the depth of a wreck under water to determine what type of diving equipment to use? | SONAR gear |
| Scientists have found that rocks closer to the ____ ridges formed more recently than rocks farther from the ridge. | mid-ocean |
| The ____ ____ in the sea-floor rocks and the different ages of the rocks led scientists to a startling conclusion. What was it? | magnetic patterns, New sea floor is continually being formed along underwater mountain chains, or mid-ocean ridges. |
| As the two plates separate along a ridge, ____ fills the separation. | magma |
| The rigid or solid, rocky layer of Earth. | lithosphere |
| The lithosphere includes the ____ and the solid upper part of the ____. | crust , mantle |
| What is the layer below the lithosphere called, that is not rigid? | asthenoshpere |
| The rock in the lower asthensophere is partially ____. | melted |
| ____ ithe process by which energy is transferred by a moving fluid. | Convection |
| Convection occurs when a fluid is placed between a ____ lower surface and a ____ upper surface. | hot , cold |
| A ____ ____ is the path along which the energy is transferred. | convection current |
| The theory of ____ ____ states the Earth's crust and upper mantle are made up of a series of rigid or nearly rigid plates that are in ____. | plate tectonics , motion |
| Sliding Plates are plates that move past one another at ____-____ ____. | transform-fault boundaries |
| A ____ is a very large crack in the Earth's rocks, along which movement has taken place. | fault |
| Places where plates interact are called ____ ____. | plate boundaries |
| Colliding Plates are where Plates collide, or come together, at ____ ____. | convergent boundaries |
| Separating Plates are plates that move away from one another at ____ _____. | divergent boundaries |
Created by:
tphillip1053