Seismic Waves

Question 1

Mantle

Answer 1

Has the properties of a solid,but can flow very slowly

Question 2

Outer core

Answer 2

Made from liquid nickel and iron

Question 3

Inner core

Answer 3

Made from solid nickel and iron

Question 4

Crust

Answer 4

Relatively thin and rocky

Question 5

Where do earthquakes happen?

Answer 5

Earthquakes happen when large parts of the Earth’s crust and upper mantle move suddenly. It is difficult to predict exactly when and where they will happen

Question 6

Earthquake produce shockwaves called______ _____which can be detected using machines called________

Answer 6

Seismic waves

Seismograph

Question 7

P- waves

Answer 7

Primary waves are faster type of seismic waves. They are longitudinal waves and can travel through solids and liquids

Question 8

S-waves

Answer 8

Secondary waves are slower type of seismic waves. They are transverse and can only travel through solids. This means they cannot travel through the liquid outer core of the earth.

Question 9

When s-waves hit the Earth’s surface they make objects and buildings vibrate________.

Answer 9

Horizontally