The ozone layer protects life on earth by
absorbing harmful ultraviolet radiation. the
ozone layer is located between 17 kilometers and 35 kilometers above earth’s surface in which
atmospheric temperature zone?
(1) troposphere (3) mesosphere
(2) stratosphere (4) thermosphere

The ozone layer protects life on earth by absorbing harmful ultraviolet radiation. The ozone layer is located between seventeen kilometers and thirty-five kilometers above the earth's surface in the stratosphere (2). The ozone layer is also known as the earth's shield. This layer contains high concentrations of ozone. It is interesting to note that Ozone is made up of three oxygen molecules; water consists of one hydrogen molecule and two oxygen molecules. It absorbs about ninety-seven percent of the sun's ultraviolet rays. 

Its decreasing because of illnesses

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years