Why Did Carl Sagan Say That We Are Star Stuff

question 38

Multiple Choice

Why did Carl Sagan say that we are star stuff?

• A)The composition of most stars (mostly hydrogen and helium)is about the same as the composition of our bodies.
• B)Cosmic rays reaching Earth from distant astronomical sources may be one source of mutations that help evolution along.
• C)Nearly every atom from which we are made once (before the solar system formed)was inside of a star.
• D)Nearly every atom from which we are made was once inside our star,the Sun.
• E)Sagan thought that all of us have the potential to be movie (or TV)stars like he was.

Comprehend the logic and functionality of different contact devices within ladder diagrams.

Grasp the principles of motor starter operation and control within a circuit.

Understand the fundamentals of three-wire motor control circuits and their components.

Distinguish between maintained and momentary contact functions in control circuits.

---

Definitions:

Least Common

The smallest or rarest occurrence or item in a given set or category.

Anti-D Serum

An immunoglobulin given to prevent Rh incompatibility reactions, often used in pregnancy.

Rh Antigens

Proteins present on the surface of red blood cells that determine an individual's Rh blood group, critical in blood transfusion compatibility.

Agglutinogens

Antigens on the surfaces of red blood cells that determine blood types and can cause agglutination.