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Match the Four Components of the Interstellar Medium (ISM) with Their

Question 21

Matching

Match the four components of the interstellar medium (ISM) with their respective description. You may use the choices more than once.

Premises:

Responses:

The part of the ISM that can only be detected with X-ray telescopes have has temperatures of 10 ⁶ K or higher

H I cloud

The coolest temperature

Molecular clouds

ISM clouds of cool gas of only about 100 K and dust with densities ranging up to 100 atoms per cubic centimeter and observed only at infrared and radio wavelengths

Intercloud medium

The hot space of ISMs with temperatures of a few thousand K and a density of only 0.1 atom per cubic centimeter found between the cool H I clouds

Coronal gas

Clouds of gas and dust with densities ranging from 100s to 1000s particles per cubic centimeter, found deep inside the ISM, where it is protected from UV photons

Highly ionized state

A chaotic shape that is usually twisted, flattened, and tangled

Premises:

The part of the ISM that can only be detected with X-ray telescopes have has temperatures of 10 ⁶ K or higher

The coolest temperature

ISM clouds of cool gas of only about 100 K and dust with densities ranging up to 100 atoms per cubic centimeter and observed only at infrared and radio wavelengths

The hot space of ISMs with temperatures of a few thousand K and a density of only 0.1 atom per cubic centimeter found between the cool H I clouds

Clouds of gas and dust with densities ranging from 100s to 1000s particles per cubic centimeter, found deep inside the ISM, where it is protected from UV photons

Highly ionized state

A chaotic shape that is usually twisted, flattened, and tangled

Responses:

H I cloud

Molecular clouds

Intercloud medium

Coronal gas

Correct Answer:

Premises:

Responses:

The part of the ISM that can only be detected with X-ray telescopes have has temperatures of 10 ⁶ K or higher

The coolest temperature

ISM clouds of cool gas of only about 100 K and dust with densities ranging up to 100 atoms per cubic centimeter and observed only at infrared and radio wavelengths

The hot space of ISMs with temperatures of a few thousand K and a density of only 0.1 atom per cubic centimeter found between the cool H I clouds

Clouds of gas and dust with densities ranging from 100s to 1000s particles per cubic centimeter, found deep inside the ISM, where it is protected from UV photons

Highly ionized state

A chaotic shape that is usually twisted, flattened, and tangled