1. The epicenter of an earthquake can be located using from at least three seismographic stations. 2. The Richter scale magnitude can be calculated using the of the wave traced out on a seismogram.
3.Rayleigh waves and Love waves are confined to the .
Match the term on the left with its definition on the right.

TermDefinition
4. Seismic shadow zonea. A process used to determine the epicenter of an earthquake
5. Triangulationb. A surface wave that causes horizontal motion
6. Rayleigh wavesc. Areas on the earth’s surface where waves traveling through the earth don’t arrive due to refraction
7. Love wavesd. A surface wave that causes vertical motion
Respond to the following based on your reading.

Why can seismic waves be used to determine structures and materials within the earth?

1. triangulation

2. amplitude

3. surface

4. c

5. a

6. d

7. b

8. Seismic waves can be used to determine the structures and materials of the earth because the waves change in their movement and behavior based on the materials or structures that they encounter.

1. triangulation

2. amplitude

3. surface

4. c

5. a

6. d

7. b

8. Seismic waves can be used to determine the structures and

materials of the earth because the waves change in their

movement and behavior based on the materials or structures that

they encounter.

Explanation:

THESE ARE THE CORRECT ANSWERS. HOPE THIS HELPS :)

preservation because he preserves part of the land and preserves means save

explanation:

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.