Which phrase defines a seismograph? (1 point)

Question

A: an instrument used to measure vibrations
B: a record of seismic activity from earthquakes
C: a wave that is generated by an earthquake
D: a fracture within rocks along which earthquakes occur

2: Which option describes the seismic waves that can cause damage to structures during an earthquake? (1 point)
A: All seismic waves can cause damage, but P waves and S waves cause the most damage.
B: Only P waves and S waves can cause damage. Surface waves do not cause any damage.
C: Only surface waves can cause damage. P waves and S waves do not cause any damage.
D: All seismic waves can cause damage, but surface waves cause the most damage.

3: In which states would it be most necessary for engineers to consider the possibility of earthquakes when designing structures and buildings? (1 point)
A: Pennsylvania and Minnesota
B: California and Washington
C: Texas and North Dakota
D: New York and Florida

4: Which of the following best explains why engineers might prefer to use steel as a building material when designing earthquake-safe structures? (1 point)
A: because it is more readily available in developing countries
B: because it is less able to withstand seismic vibrations
C: because it is more flexible than other materials
D: because it is less expensive than other materials

Answer 1

1: Which phrase defines a seismograph?
Answer: A, an instrument used to measure vibrations

2: Which option describes the seismic waves that can cause damage to structures during an earthquake?
Answer: D, All seismic waves can cause damage, but surface waves cause the most damage.

3: In which states would it be most necessary for engineers to consider the possibility of earthquakes when designing structures and buildings?
Answer: B, California and Washington

4: Which of the following best explains why engineers might prefer to use steel as a building material when designing earthquake-safe structures?
Answer: C, Because it is more flexible than other materials

If these are not correct for you, you likely have the wrong assessment.
(I took the quick check and got the answers from it.)