Question

answer these questions


1 define the following

a focus

b epicentre


c richter scale


d tsunami


ans


Class 7​

Answer 1

Answer:

a)In physics, a focus is “a point at which rays of light, heat, or other radiation meet after being refracted or reflected.” Perhaps you can imagine how a fireplace or a hearth—contained areas and sources of heat and light—was likened to such a point in math and science.

Explanation:

b)According to Merriam-Webster's definition, an epicenter is "the part of the earth's surface directly above the focus of an earthquake." It can also mean

Answer 2

Answer:

Focus - to give all your attention to something

Epicentre - the point on the earth’s surface where the effects of a sudden movement (earthquake) are felt most strongly

richter scale - The Richter scale is a scale of numbers used to tell the power (or magnitude) of earthquakes.

tsunami - A tsunami is a series of waves caused by undersea volcanic eruption or earthquake