As a barometer lowers, what kind of weather can be expected?

What was the land like over 500 million years ago? what was under the sea?

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

How does the color of light affect the germination time (amount time a plant takes to develop) of a radish seed?