Name:

Seismic Waves 

1) What are seismic waves caused by?

 

a) Volcanoes
b) Traffic
c) Earthquakes
d) Thunder  

2) What causes Earthquakes?

a) The flow of magma
b) The expansion of the Earth’s crust
c) The contraction of the Earth's crust
d) The Earth’s plates rubbing together
e) The explosion of volcanoes

3) What do we use to record seismic waves?

 

a) Seisnoneter
b) Seismograph
c) Seismonomer
d) Seismoscope

4) P waves are:

a) Longitudinal
b) Electromagnetic
c) Ultrasonic
d) Transverse

5) S waves are:

a) Longitudinal
b) Electromagnetic
c) Ultrasonic
d) Transverse

6) P waves can travel through

a) Liquids but not solids
b) Solids but not liquids
c) Both liquids and solids
d) Neither solid or liquid

7) S waves can travel through

a) Liquids but not solids
b) Solids but not liquids
c) Both liquids and solids
d) Neither solid or liquid

8) Choose the correct statement:

 

a) P waves are slower than S waves
b) P waves have the same speed as S waves
c) S waves are slower than P waves
d) It is not possible to record the speed of S and P waves

9) Choose the correct statement:

 

a) Seismic waves travel faster through less dense material
b) Seismic waves travel at one speed regardless of the density of the material
c) It is not possible to record the speed of seismic waves
d) Seismic waves travel faster through more dense material

10) Good evidence that the density of the Earth increases gradually within a layer is where seismic waves:

 

a) suddenly change paths when the density abruptly changes
b) travel in gently curving paths due to refraction
c) travel in gently curving paths due to total internal reflection
d) travel in straight lines through the Earth
e) travel in gently curving paths due to diffraction

11) Good evidence that the Earth has a layered structure is where seismic waves: 

a) suddenly change paths when the density abruptly changes
b) travel in gently curving paths due to refraction
c) travel in gently curving paths due to total internal reflection
d) travel in straight lines through the Earth
e) travel in gently curving paths due to diffraction

12) The Earth’s crust is best described like this:

a) It is extremely viscous. It’s density increases with depth which extends almost halfway to the centre of the Earth
b) It is just over half of the Earth's diameter, the outer part of which is liquid and the inner part of which is solid
c) It is a thin layer of rock
d) It is extremely viscous - density decreases with depth and which extends almost halfway to the centre of the Earth
e) It is just over half of the Earth's diameter, the outer part of which is solid and the inner part of which is liquid

13) The Earth’s mantle is best described like this:

  

a) It is extremely viscous. It’s density increases with depth which extends almost halfway to the centre of the Earth
b) It is just over half of the Earth's diameter, the outer part of which is liquid and the inner part of which is solid
c) It is a thin layer of rock
d) It is extremely viscous - density decreases with depth and which extends almost halfway to the centre of the Earth
e) It is just over half of the Earth's diameter, the outer part of which is solid and the inner part of which is liquid

14) The Earth’s core is best described like this:

 

a) It is extremely viscous. It’s density increases with depth which extends almost halfway to the centre of the Earth
b) It is just over half of the Earth's diameter, the outer part of which is liquid and the inner part of which is solid
c) It is a thin layer of rock
d) It is extremely viscous - density decreases with depth and which extends almost halfway to the centre of the Earth
e) It is just over half of the Earth's diameter, the outer part of which is solid and the inner part of which is liquid

 

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