Earth's spheres
the relatively thin envelope of gases that forms Earth's outermost layer
What is the atmosphere?
the ability to do work
What is energy?
a loop in which a signal or action triggers another signal or action
What is feedback?
two main sources of energy for Earth's system
heat from the sun and heat from Earth's interior
warmer air makes glaciers melt even faster- an example of ........................
What is feedback?
the solid metal inner core, the liquid metal outer core, and the rocky mantle and crust
a group of parts that work together as a whole
What is a system?
What is negative feedback?
all of Earth's water, including water that cycles through the atmosphere
What is the hydrosphere?
a type of feedback that reinforces, speeds up, or enhances the process that's already underway
What is positive feedback?
the frozen component of the hydrosphere, made up of all the ice and snow on land, plus sea and lake ice
What is the cryosphere?
the parts of Earth that collectively contain all living organisms
What is the biosphere?