Which statements describe a seismograph? check all that apply. it has a curved graphing surface. it is used to locate an earthquake’s epicenter. it uses a needle on graph paper to measure seismic wave activity. it determines the arrival time of p waves. it measures data used to find the difference between the arrival times of surface waves.

It is used to locate an earthquake’s epicenter.

It uses a needle on graph paper to measure seismic wave activity.

It measures data used to find the difference between the arrival times of surface waves.

Explanation :

Seismograph is an instrument which is used to record earthquake at any location.

It has many uses. Some of them are as follows :

(i) It is used to locate an earthquake’s epicenter.

(ii) It uses a needle on graph paper to measure seismic wave activity.

(iii) It measures data used to find the difference between the arrival times of surface waves.

So, the correct options are (b), (c) and (d).

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%