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EES 2.1
| Term | Definition |
|---|---|
| Convection Currents | The movement of heat through liquids or gases, causing warmer material to rise and cooler material to sink. |
| Geosphere | The solid part of Earth, including rocks, soil, and landforms. |
| rock cycle | The process that changes rocks from one type to another over time. |
| earthquake | A sudden shaking of the ground caused by movement along cracks in Earth’s crust. |
| fault line | A break or crack in Earth’s crust where movement happens. |
| volcano | A mountain that forms when molten rock erupts onto Earth’s surface. |
| plate tectonic | The theory that Earth’s outer shell is divided into plates that move over the mantle. |
| pangea | A supercontinent that existed millions of years ago before breaking apart. |
| theory | A well-tested explanation that helps us understand natural events. |
| magnitude | A measure of the strength or energy released by an earthquake. |
| seismograph | A tool that records the vibrations caused by earthquakes. |
| Rictor scale | A scale that measures the magnitude of an earthquake. |
| Epicenter | The point on Earth’s surface directly above where an earthquake starts. |
| Lithosphere | The rigid outer layer of Earth, made up of the crust and upper mantle. |
| molten rock | Rock that has melted due to high heat. |
| magma | Molten rock found beneath Earth’s surface. |
| lava | Molten rock that reaches Earth’s surface during a volcanic eruption. |
| thermal energy | Heat energy that comes from the movement of particles. |
| divergent | Where two tectonic plates move away from each other. |
| convergent | Where two tectonic plates move toward each other. |
| primary wave | The fastest seismic wave that moves through solids and liquids. |
| secondary wave | A slower seismic wave that moves only through solids. |
| flow | The movement of a liquid or gas from one place to another. |
| continents | Large landmasses on Earth’s surface. |
| Alfred Wegener | The scientist who proposed the idea of continental drift. |
| Continental drift | The theory that continents slowly move across Earth’s surface. |
| rocks | Naturally formed solid materials made of minerals. |
| fossils | Preserved remains or traces of ancient living things. |
| tsunami | A large, powerful ocean wave usually caused by an underwater earthquake, landslide, or volcanic eruption. |
| seismograph | device recording earthquake waves |
| Richter scale | scale measuring quake magnitude |
| fault lines | fractures where plates move |
| epicenter | point on surface above quake focus |
| volcanism | magma rock on Earth's surface |
| lava | molten rock on earths surface |
| magma | molten rock underground |
| seafloor spreading | new ocean crust forms at ridges |
| ductile | able to bend without breaking |
| p waves | faster compression waves |
| s waves | slower side to side waves |
| magnitude | size of an earthquake |
| support for wegener's proposed theory | rocks, fossils, climate change |
| trench | deep ocean valley at subduction zones |
| slab pull | sinking plate pulls the rest |
| ridge | underwater mountain chain at divergence |
| plume | rising hot mantle column |
| rift | crack where crust splits |
| isotope | atom with same proton, different neutrons |
| half life | time for half a radioactive sample to decay |
| thermal | relating to heat |
| convection | heat transfer by moving fluids |
| thermal convection | heat moved by flowing upper mantle |
| mantle | thick layer of earth between crust and core |
| asthenosphere | soft, flowing upper mantle |
| tectonic plates | large moving peices of earths crust |
| continental drift | continents slowly moving |
| pangea | ancient supercontinent |
| radioactivity | unstable atoms releasing energy |
| seismic waves | vibrations from earthquakes |
| fossil | preserved remains of past life |
| radioactive decay | unstable atoms breaking down |
| geosphere | earths solid parts |
| density | mass per volume |
| inner core | solid center of the earth |
| outer core | liquid layer around the inner core |
| divergent boundary | plates move apart |
| convergent boundary | plates collide |
| transform boundary | plate slide past each other |
| water | A chemical substance (H₂O) essential for life, existing as solid, liquid, or gas. |
| property | A characteristic or trait of a substance that describes how it looks or behaves. |
| energy | The ability to do work or cause change. |
| transfer | The movement of something (such as energy or matter) from one place to another. |
| agent | Something that causes an effect or change. |
| store | To keep energy or material for later use. |
| absorb | To take in energy or a substance. |
| transmit | To pass something through or along. |
| solid | Matter with a fixed shape and volume. |
| liquid | Matter with a fixed volume but no fixed shape. |
| gas | Matter with no fixed shape or volume. |
| temp | A measure of how hot or cold something is. |
| heat | Energy that moves from a warmer object to a cooler one. |
| heat transfer | The movement of heat through conduction, convection, or radiation. |