Earthquakes & Tsunamis
What scientific instrument helps scientists measure an earthquake's strength and determine where it originally started?
A seismograph (seismometer)
What artificial barrier is built alongside riverbanks to stop rising water from overflowing into land?
levees
What is the process of pumping or moving sand back onto an eroded coastline to rebuild the shoreline called?
Beach Reclamation (dredging)
What is an agricultural practice that carves flat, step-like ledges into steep hillsides to prevent water from washing topsoil away?
terrace farming
The Tsunami Warning System is a warning system designed to alert people in coastal areas to evacuate in the event of a tsunami. Scientists need to know when a tsunami may occur. What question is most important for the scientists to answer?
a. How many tsunamis have affected the coastal area?
b. How can large movements be detected from far away?
c. How high was the tallest tsunami yet?
d. How many people live in the coastal area?
b. How can large movements be detected from far away.
Unlike levees, what structure is built across a waterway to block or alter the natural flow of water?
What is a stone or concrete structure extending out into the ocean to protect beaches from erosion caused by waves and currents called?
a jetty
How can humans reduce soil erosion?
by planting vegetation
Which question would scientists MOST likely need to ask when limiting destruction caused by an EARTHQUAKE?
a. How can buildings be designed to absorb energy?
b. How can weathered debris be held in place?
c. How can glass be designed to withstand high-speed impacts?
d. How can water be contained to avoid property damage?
a. How can buildings be designed to absorb energy?
Which question would scientists MOST likely need to ask when limiting destruction caused by a FLOOD?
a. How can buildings be designed to absorb energy?
b. How can weathered debris be held in place?
c. How can glass be designed to withstand high-speed impacts?
d. How can water be contained to avoid property damage?
d. How can water be contained to avoid property damage?
Which question would scientists MOST likely need to ask when limiting destruction caused by a HURRICANE?
a. How can buildings be designed to absorb energy?
b. How can weathered debris be held in place?
c. How can glass be designed to withstand high-speed impacts?
d. How can water be contained to avoid property damage?
c. How can glass be designed to withstand high-speed impacts?
Which question would scientists MOST likely need to ask when limiting destruction caused by a LANDSLIDE?
a. How can buildings be designed to absorb energy?
b. How can weathered debris be held in place?
c. How can glass be designed to withstand high-speed impacts?
d. How can water be contained to avoid property damage?
b. How can weathered debris be held in place?
What is the main objective of a Tsunami Warning System for coastal populations?
To give people enough time to evacuate.
How are dams and levees different?
Levees do not block the flow of water.
How can the damage caused by coastal flooding be reduced?
by planting vegetation
by preserving and restoring coastal wetlands
How can humans help prevent loose soil from causing a landslide?
build a retaining wall
True or False: Seismographs allow scientists to prevent earthquakes from happening.
False. We cannot prevent earthquakes.
True or False: Adding sediment to the bottom of the river to raise the water level will prevent flood damage to homes along the river.
False
What can humans do to decrease the destructive force of hurricanes on coastal areas?
create levees to control water flow
What are two drainage structures in cities and neighborhoods hold or redirect excess rainfall runoff during heavy rainstorms ?
retention ponds and storm drains