How Did Astronomers Determine That Elliptical Galaxies Are Composed Mostly

question 61

Multiple Choice

How did astronomers determine that elliptical galaxies are composed mostly of dark matter?

• A) They measured X-ray emission from hot gas gravitationally bound to the galaxies.
• B) They measured the rotation rates of gas as a function of distance from the centers of the galaxies.
• C) They measured the amount of gravitational pull elliptical galaxies have on companion galaxies.
• D) They assumed that the proportion of dark matter was roughly the same as in spiral galaxies.

Assess the contribution of women to the abolitionist movement and its influence on the feminist movement.

Understand the changing social acceptance of women's public roles and public speaking in the context of abolition.

Evaluate the diverse viewpoints on freedom between different racial groups and how these perspectives were manifested.

Analyze the role of literature and public debate in shaping attitudes towards slavery and abolition.

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Definitions:

Malignant Cells

Abnormal cells that divide uncontrollably and have the potential to invade other tissues, leading to cancer.

Neoplasm

An abnormal growth of tissue, which can be benign or malignant, resulting from uncontrolled cell division.

Oncogene

A gene that has the potential to cause cancer by transforming a normal cell into a tumor cell when mutated or expressed at high levels.

Telomeres

Protective caps at the ends of chromosomes that prevent the loss of genetic information during cell division and play a role in aging and cancer.