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  • Science with Sophie: What Are Scabs?

    platelet
    fibrin
    physiology
    wound healing
    scabs
    Sophie explains how scabs form and how wounds are healed. She uses an analogy involving beavers building a dam to describe how the human body repairs skin.

  • Science with Sophie: Dog Diversity

    genetic diversity
    genes
    benefits of genetic diversity
    Sophie tackles the question of why there are so many different breeds of dogs. She briefly discusses the history of dogs and discusses how genetics makes dogs different and why some breeds are better suited for certain functions.

  • Science with Sophie: Simple Machines

    pulley
    lever
    inclined plane
    wedge
    screw
    wheel and axle
    force
    simple machines
    work
    6 simple machines
    Sophie illustrates the six basic simple machines that exist and explains how they are useful in our everyday lives. She defines force and work and mentions that simple machines reduce the amount of work required for a task.

  • Science with Sophie: What is Food?

    macronutrients
    micronutrients
    nutrients
    Sophie explains why we eat food: to ingest chemicals such as nutrients. She dissects a salad to illustrate the different types of nutrients our body needs: carbohydrates, proteins, and fats. She provides an example of each type of nutrient.

  • Science with Sophie: Why Do We Cry?

    lacrimal gland
    basal tears
    reflex tears
    emotional tears
    physiology
    tear production
    Sophie explains the purpose of tears and discusses the different types of tears that we produce. She also discusses why onions cause us to tear up.