If You Found a Halo Star That Was 13 Billion

question 57

Multiple Choice

If you found a halo star that was 13 billion years old and had the same amount of heavy elements as the Sun, would you be surprised?

• A) No; many halo stars have high fractions of heavy elements.
• B) No; this star probably escaped from a globular cluster.
• C) No; this star has been around a long time, and has created a lot of heavy elements through nuclear fusion.
• D) Yes, because most halo or globular cluster stars have few heavy elements.
• E) Yes; halo stars mostly have ages less than 10 billion years.

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Definitions:

Surgical Dressing

Materials applied to a wound post-surgery to protect it and promote healing.

Incision Line

The mark or wound made by a surgical cut into the body, often referring to its appearance during the healing process.

Intermittent Sutures

A stitching technique used in surgery where stitches are placed individually, tying off each separately rather than in a continuous line.

Knot

A fastening made by tying a piece of string, rope, or other material around itself or another object, often used as a means of securing, binding, or limiting movement.