Which of the following statements about matter is true? a. mass and matter are always the same. b. matter is made up of atoms and has mass. c. mass can decrease while matter increases. d. matter does not exist in the biosphere.

B.

Anything that has mass is matter but in order to have mass it needs to be made up of atoms. Matter cannot increase as it is not a measurement.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.