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Earth's and Space Science

Review the clues across and down to identify the scientific terms related to our current unit of study.
Across
A solid / liquid layer of earth
Scientists use this tool to make far away objects look closer.
A liquid layer of nickel and iron
The branch of science which deals with celestial objects, space, and the physical universe as a whole
Cooler star
Down
Darker, cooler areas on the photosphere of the sun.
A dense sphere of solid iron and nickel at the center of Earth.
This is the hottest layer of the sun,where Hydrogen atoms fuse to make Helium and Energy.
A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
A thin and solid outermost layer of the Earth