We Know the Sun's Corona Is Very Hot Because

question 47

Multiple Choice

We know the Sun's corona is very hot because

• A) we observe it emitting radiation at visible wavelengths.
• B) the chromosphere and the photosphere are that hot, too.
• C) we observe absorption from highly ionized atoms of iron and calcium in its spectrum.
• D) the gas emits most of its radiation at radio wavelengths.
• E) all of the above

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Definitions:

Fossilized

Fossilization refers to the process by which organic material is replaced by minerals, turning remains into stone over geological time.

Plate Tectonics

This is the scientific theory that explains the large-scale motion of Earth's lithosphere, which is divided into tectonic plates.

Earth's Crust

The outermost layer of the Earth, composed of solid rocks and minerals, which is both continental and oceanic in type.

Unique Traits

Characteristics or features that distinguish an individual or species from others.