Science Explorers: Sec 2- Measuring Earthquakes. Sec 3 - Earthquake Hazards & Safety

Question 0

What are the different kinds of seismic waves?

Answer 0

P waves- primary waves
S waves- secondary waves
Surface waves

Question 1

How does the energy of an earthquake travel through earth?

Answer 1

Seismic waves

Question 2

What are the scales used to measure the strength of an earthquake?

Answer 2

Mercalli scale
Richter scale - uses seismograph
Moment magnitude scale

Question 3

What kinds of damage does an earthquake cause? Chpt 3

Answer 3

Damage/destroy buildings & bridges
Topple utility poles
Fracture gas & water pipes

Question 4

What can be done to reduce earthquake hazards? Chpt 3

Answer 4

Build strong, flexible building on good land

Secure fireplaces, water heaters, and household items.

Question 5

Explain how liquefaction occurs and how it causes damage during an earthquake? Chpt 3

Answer 5

Earthquake shaking suddenly turns loose, soft soil into liquid mud.
Causes landslides, and buildings to sink and pull apart.

Question 6

Describe safety measures to protect yourself during an earthquake. Chpt 3

Answer 6

Drop, cover, and hold.
Under a desk or table if possible. Otherwise against an inner wall and cover neck and heads with hands. Stay away from glass, mirrors, and objects that might fall.