What Critical Event Transforms a Protostar into a Normal Main-Sequence

question 50

Multiple Choice

What critical event transforms a protostar into a normal main-sequence star?

• A) Planets form in the accretion disk.
• B) The star grows suddenly larger in radius.
• C) Triple-alpha reactions begin in the core.
• D) Nuclear fusion begins in the core.
• E) Convection begins throughout the star's interior.

Associate specific weight change patterns with underlying health conditions.

Understand the impact of racial discrimination on African-American soldiers during World War Two.

Identify key figures and their roles in race relations and black employment during World War Two.

Analyze the effects of government policies on racial integration and employment during World War Two.

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Definitions:

Milestones

Key points or events in the development of something or someone, often marking significant progress or stages of achievement.

Sitting Alone

The ability of an infant to maintain an upright sitting position without support, a developmental milestone usually achieved around 6 months of age.

Crawling

A form of locomotion used by infants that involves moving on the hands and knees or hands and feet before the ability to walk has been developed.

Sucking Reflex

An automatic response in which an infant sucks on anything placed in their mouth.