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
Earthquake Volcano
Words for Science Unit
| Term | Definition |
|---|---|
| Compression | Stress that squeezes rock until it folds or breaks |
| Fold | A bend in rock that forms where parts of the earth's crust is compressed |
| Tension | Stress that stretches rock so that it becomes thinner in the middle |
| Shearing | Stress that pushes a mass of rock in opposite directions |
| Fault block mountain | A mountain that forms where a normal fault uplifts a block of rock |
| Focus | The point between the Earth's surface where rock breaks under stress and causes an earthquake |
| Seismic wave | A vibration that travels through Earth carrying the energy released during an earthquake |
| Epicenter | The point of Earth's surface directly above an earthquake's focus |
| Seismograph | A device that records ground movement caused by seismic waves as they move through Earth |
| P waves | Seismic waves that compress and expands the ground |
| S waves | Seismic waves that move the ground up and down or side to side |
| L waves | Seismic waves that move along the surface of the Earth |
| Richter Scale | Scale that rates seismic waves as measured by the seismograph |
| Cinder volcano | A kind of structure that forms when a volcano erupts silently |
| Shield volcano | A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions |
| Composite volcano | A tall, cone-shaped volcano in which layers of lava alternate with layers of ash and other volcanic material |
| Dormant | A volcano that does NOT show signs of erupting in the near future |
| Extinct volcano | A volcano that is unlikely to erupt again |
| volcano | A weak spot in the crust where molten material from the mantle comes to the surface |
| Magma | A molten mixture of rock-forming materials, gases and water |
| Lava | Liquid magma that reaches the surface |
| Ring of Fire | A major volcanic belt formed by many volcanoes that rim the Pacific Ocean |
| Island arc | A string of islands caused by volcanic eruption |
| Hot spot | A place where magma from deep within the mantle melts through the crust above it in the middle of a plate far from the plate boundary |
| Magma chamber | A pocket inside a volcano where magma collects under the ground |
| Pipe | A long tube that connects the magma chamber to the earth's surface where magma moves |
Created by:
teresagoodman
Popular Earth Science sets