Courtney is enrolled in an advanced physics class at her high school. she is one of only three girls in the class, and she is aware of the notion that girls are poorer at math and science than boys. this knowledge may actually hinder courtney's performance in the class as a result of:

Stereotype threat

A stereotype threat is a social-psychological predicament that can alters academic identity and intellectual performance. Negative stereotypes raise inhibiting doubts and high-pressure anxieties in a test-taker's mind that result to reduce the performance of individuals.

The mind set of Courtney that boys do better than girls in math and science would create anxiety, which will then trigger a mechanism of decreases performance by depleting the working memory of the brain.

i think the answer is sterotype threat

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.