The Terrestrial Planets Are Made Almost Entirely of Elements Heavier

question 18

Multiple Choice

The terrestrial planets are made almost entirely of elements heavier than hydrogen and helium.According to modern science,where did these elements come from?

• A)They were produced by stars that lived and died before our solar system was born.
• B)They were produced by gravity in the solar nebula as it collapsed.
• C)They have been present in the universe since its birth.
• D)They were made by chemical reactions in interstellar gas.

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Definitions:

Nonprescription Drugs

Medications that can be bought without a doctor's prescription, also known as over-the-counter (OTC) drugs, used for treating minor health issues.

Suicide

The act of intentionally causing one's own death, often stemming from factors such as psychological disorders, trauma, or overwhelming stress.

Recreational Drugs

Substances taken for pleasure rather than for medical reasons, often associated with altered states of consciousness and legal issues.

Carbon Monoxide

is a colorless, odorless gas produced by burning carbon-based fuels, which can be hazardous or fatal when inhaled in large quantities.