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

Question 25

Matching

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

Premises:

Responses:

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

H I cloud

Highly ionized state

Molecular clouds

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

Intercloud medium

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

Coronal gas

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 coolest temperature

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

Premises:

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

Highly ionized state

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-1000s particles per cubic centimeter, found deep inside the ISM, where it is protected from UV photons

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 coolest temperature

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

Responses:

H I cloud

Molecular clouds

Intercloud medium

Coronal gas

Correct Answer:

Premises:

Responses:

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

Highly ionized state

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-1000s particles per cubic centimeter, found deep inside the ISM, where it is protected from UV photons

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 coolest temperature

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