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nine weeks test
| Question | Answer |
|---|---|
| where does continental drift run from | Alaska to Mexico |
| longshore drift | zig- zag movement of sand along beach |
| glacier, where does it form | large mass of ice that moves over land , cold regions |
| tectonic plates | lithosphere broken into small slabs of rock |
| continental drift | continents once joined in a single lag mass & gradually moved, Alfred Weagner process |
| theory of plate tectonics | lithosphere made of huge plates that moved over Earth's surface |
| 3 types of boundaries | divergent, convergent, transform boundary |
| hot spots | heated rock rises in plumes , or thin columns from mantle |
| earthquake | shaking of ground cased by sudden movement by stress |
| where do most earthquake form | along faults |
| 3 types of faults | normal, reverse, strike slip |
| focus | point underground where rock first begin to move |
| epicenter | point on earth's surface directly above focus |
| seismic waves | vibrations caused by earthquakes |
| fastest waves | primary wave |
| most damaging waves | surface waves |
| what to measure an earthquake with | seismograph |
| where are most of the world's mountain belts located | plate boundaries |
| volcano | mountain built up from erupted material |
| lava | magma that has reached earth's surface |
| where do most volcanoes form | along plate boundaries |
| what is the Ring of Fire | line of volcanoes around pacific ocean over 80% of volcanoes along subduction zone |
| 3 types of volcanoes | shield, cinder cone, composite |
| 3 substances that help preserve remains | ice, tar, amber |
| thin tree rings | dry hardly any rainfall |
| thick tree rings | a lot of rainfall |
| half-life | length of time it takes for half of the atoms in a sample of a radioactive element to change from unstable form into a for |
| Houston's Theory of uniformation | earth is allay changing & same forces of change at work were at work in past |
| geologic time scale | earth's history divided into eon, era, period, epoc |
| natural resource | any energy source, organism, or sub. found in nature the people use |
| difference between non and renewable source | Renewable- can reuse nonrenewable- can't reuse |
| fossil fuel | nonrenewable energy source formed from accent plats/ animals |
| what does conservation involve | reduce,reuse,recycle |
| nuclear fission | nucleus of a radioactive atom is split, forming lighter elements and releasing a huge amount of energy |
| how to use sunlight to produce energy | solar power |
| difference between relative and absolute | Relative- estimate absolute- actual |