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Classifying Matter by State02:49

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Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, water, soil, mountains, even our bodies are all examples of matter. Matter is divided into three states — solid, liquid, and gas — that are commonly found on earth. The fourth state of matter, plasma, occurs naturally in the interiors of stars. 
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Matter: Pure Substances and Mixtures
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The substance of the universe—from a grain of sand to a star—is called matter. Scientists define matter as anything that occupies space and has mass. An object’s mass and its weight are related concepts, but not quite the same. An object’s mass is the amount of matter contained in the object and is the same whether that object is on Earth or in the zero-gravity environment of outer space. An object’s weight, on the other hand, is its mass as affected by the pull of...
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The earliest recorded discussion of the basic structure of matter comes from ancient Greek philosophers. Leucippus and Democritus argued that all matter was composed of small, finite particles that they called atomos, meaning “indivisible.” Later, Aristotle and others came to the conclusion that matter consisted of various combinations of the four “elements” — fire, earth, air, and water — and could be infinitely divided. Interestingly, these philosophers...
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Why Polyvictimization Matters.

David A Wolfe1

  • 11 Western University, London, Ontario, Canada.

Journal of Interpersonal Violence
|February 8, 2018
PubMed
Summary
This summary is machine-generated.

Children experiencing poly-victimization face ongoing harm and are at higher risk for future victimization and perpetration. This research emphasizes inclusive, person-centered strategies for prevention and intervention.

Keywords:
poly-victimizationrelationshipsuniversal preventionviolence prevention

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Area of Science:

  • Criminology
  • Developmental Psychology
  • Public Health

Background:

  • Research on violence and victimization is evolving.
  • Poly-victimization, experiencing multiple forms of harm, is a critical area of study.
  • Previous research often focused on singular, isolated violent events.

Purpose of the Study:

  • To highlight the importance of studying poly-victimization across developmental stages.
  • To showcase advancements in research inclusivity for diverse and underserved youth populations.
  • To advocate for an integrative, person-centered approach to understanding and addressing violence.

Main Methods:

  • Review of five key papers in the series on violence and victimization.
  • Analysis of evolving research methodologies.
  • Exploration of strategies for recruiting hard-to-reach populations and screening for psychological maltreatment.

Main Results:

  • Poly-victimization is a more encompassing genesis of harm than singular events.
  • Children experiencing one type of violence are likely to experience others.
  • Poly-victimized youth are at increased risk for further victimization and perpetration.
  • Research is becoming more inclusive of gender minority, ethnic minority, and justice-involved youth.

Conclusions:

  • The field is shifting towards integrative, person-centered strategies for violence research.
  • Focusing on common elements like healthy relationship development can lead to common solutions.
  • Universal prevention through education systems can promote well-being, resilience, and reduce poly-victimization for all youth.