Earthquakes And Volcaoes

Question 1

Seismic Wave

Answer 1

A vibration caused by an earthquake

Question 2

Seismometer

Answer 2

An instrument that detects and records vibrations

Question 3

Seismograph

Answer 3

An instrument that detects and records earthquakes;shows seismic waves as curvy lines along a graph

Question 4

Bridges,buildings and roads were wrecked because of the ______earthquake

Answer 4

San Francisco

Question 5

______affected people by destroying 250 homes

Answer 5

Mount Saint Helens

Question 6

Earthquakes affect the environment by knocking down trees and causing ________

Answer 6

Landslides

Question 7

Volcanoes affect the environment by _______the air

Answer 7

Polluting

Question 8

Volcanoes affect the environment by losing their _______

Answer 8

Habitats

Question 9

Volcanoes affect the environment by the hot _____can burn forests

Answer 9

Lava

Question 10

_______is a mountain that builds up around an opening in Earth’s crust

Answer 10

A volcano

Question 11

Volcanoes occur at openings in Earth’s ______

Answer 11

Crust

Question 12

Volcanoes can affect plants by ______the plants

Answer 12

Killing

Question 13

_______can help plants grow

Answer 13

Volcanic soil

Question 14

________is a sudden shaking of the Earth’s crust

Answer 14

An earthquake

Question 15

Sudden movement along a ______is what causes earthquakes

Answer 15

Fault

Question 16

An ocean earthquake may cause a _______

Answer 16

Tsunami

Question 17

_______is a line of weakness in rocks

Answer 17

Fault

Question 18

Giving people people advance notice of earthquakes and volcanoes can help keep them _______

Answer 18

Safe

Question 19

Natural hazards have helped scientists understand more about the Earth’s _______

Answer 19

Structure