Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Nat. Disasters
| Term | Definition |
|---|---|
| process | physical, chemical and biological ways in which events affect earth's surface |
| tectonic plates | large surface blocks of solid earth |
| what are wind circulation and water evaporation responsible for? | forming climactic zones |
| natural hazard | natural process and event that potentially threatens human life |
| disaster | hazardous events occurring over a limited time span within a defined area |
| What 4 aspects are necessary to consider a natural hazard a disaster? | more than 10 people died, more than 100 affected, state of emergency called, international help needed |
| natural catastrophe | massive disaster requiring lots of money and a long time for recovery |
| largest number of deaths are caused by what natural hazard? | Tornadoes and windstorms |
| how much does a single natural disaster cost? | $500 million |
| atmosphere | the layer of gasses surrounding earth |
| lithosphere | earth's rocky outer layer |
| hydrosphere | the layer of water |
| biosphere | where life exists |
| environmental unity | one action causes others in a chain of events |
| What are the 5 steps of prediction? | 1. Location-delineated by mapping where occurred b4 2. Probability of Occurrence-determining probability of an event occurring at a particular location at a particular time span 3. Precursor events 4.Forecasting and Prediction 5.warning |
| what are the 5 types of hazards? | geologic hazards, hydrological hazards, climactic hazards, health & disease hazards, space hazards |
| what are some examples of geologic hazards? | tsunamis, landslides, volcanic eruptions |
| what are some examples of hydrological hazards? | floods, erosion |
| what are some examples of climactic hazards? | snowfall, hurricanes, hail, heat, tornadoes, drought |
| what are some examples of health & disease hazards? | pollution, bubonic plague, potato famine |
| what are some examples of space hazards? | solar radiation, meteorites, aliens |
| what I a fault? | a fracture along which 1 plate has moved relative to another |
| risk | the probability of a hazard occurring times the casualties it may cause |
| What parts are important in risk assessments? | exposure-how likely to experience vulnerability-how prepared location-distance to disaster hazard-what type of hazard |
| seismology | the study of elastic waves that travel through the earth |
| what are the 2 main types of waves? | compression (p) and shear (s) |
| what are compression waves? | waves that travel by squeezing/expanding medium they travel through. They can travel through solids and liquids. |
| what are shear waves? | waves that travel by shearing medium they pass through. They only pass through solids. |
| what are the 3 types of plate boundaries? | convergent, divergent, transform |
| what is continental drift? | the idea of pangea by Alfred wegener |
| every how many years do magnetic field lines on earth change? | every 100,000 years |
| how does one determine plate velocities? | hotspot tracking, ocean floor magnetic strips, oldest parts in outside of center |
| what is the easiest way heat can escape? | convection |
| force | a property or action that changes or tends to change the state of rest or velocity |
| what is the equation of force? | F=mass*acceleration |
| stress | application of force |
| what do divergent plates create? | create new lithosphere |
| when it comes to stress, what are earthquakes a result of? | stress that builds until overcomes friction |
| earthquake | a build up and release of stress due to tectonic plate interactions |
| which wave is faster? | p waves |
| surface rupture | amount of slip of fault |
| frequency | number of waves passing a reference point per second |
| period | number of seconds between successive peaks |
| amplitude | measure of ground motion |
| r wave | the surface wave in rolling motion |
| what are the 2 types of surface waves? | love and rayleigh |
| what is the moment magnitude scale? | showing the equivalence of richter scale to explosives |
| liquefaction | when put water into unconsolidated material, it behaves like a liquid |
| primary effects of earthquakes | ground shaking, ground rupture, loss of life, collapse of infrastructure, landslides, liquefaction, tsunamis |
| secondary effects of earthquakes | fires, floods, disease |
| tsunami | wave where ocean moves on land |
Created by:
VaLeRiA!
Popular Earth Science sets