Why do you need to crack a glow stick to make it light up?

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere