When you were younger, you probably had your hearing checked. Headphones were placed over your ears and you were to respond when you heard a sound. You were being tested for your hearing:.

hearing threshold

Explanation:

Hearing threshold -

it refers to the level of sound , lower than that particular level , the person won't be able to listen to any sound , is referred to as hearing threshold.

In case of adults ,

0 dB is referred to as the reference level .

Hence , from the given scenario of the question ,

Placing the headphones over the ears of the child , the process of hearing threshold is done , in order to determine the lowest sound the child can hear , calling it to be the hearing threshold.

Hence , the correct answer is hearing threshold.

the correct answer is 2.

a slump in geology means a mass movement process of slope failure. a mass of rock or unconsolidated material drops along a slip surface. in other words, rock layers move a short distance down the slope. the slump block is an intact block (2), without any landslide material.

in this image, 1 is the surface of rapture (scarp), 2 the slump block, 3 main scarp (crown), 4 base of rapture with debris flow.

slumps are caused by clear cutting on unstable soils and the sagging of earth, in coastal areas they are due to wave infiltration.

an aneroid barometer is different from a mercury barometer in that it provides readings that increase as air pressure increases.

hope it : )