The _____________ is the mixture of gases surrounding a planet.
The ___________ is all the liquid water and ice on a planet.
The _________ is the solid part of a rocky planet.
The ____________ is all the living things on a planet.
_______________ are more similar to Earth than other planets within our solar system.
______________ can provide evidence about the past because they remain after the geologic processes that formed them stop happening.
The ________________ is a gas that forms a blanket around the planet and absorbs the sun's lethal radiation.
Scientisits can use _____________ to test their ideas and get evidence about processes in the natural world that are difficult to observe.
We say a place is _______________ when it has the conditions necessary to support life.
A _______________ is a set of interacting parts forming a complex whole.
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