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Grade 4 Unit 2: Body Systems

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    4th Grade
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  • what happens to the diaphram when we breathe in?
    it contracts, it goes down
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  • what happens to the chest when we breathe in?
    it gets bigger
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  • what happens to the air when we breathe in?
    it's pulled into the lungs
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  • what happens to the diaphram when we breathe out?
    it relaxes, it goes up
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  • what happens to the chest when we breath out
    it gets smaller
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  • what happens to the air when we breath out?
    it's pushed out of the lungs
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  • what controls everything: brain, or senses?
    brain
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  • how many senses do we have: 4, 5, 6?
    5
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  • what carries messages to and instructions from the brain: nerves or msucles?
    nerves
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  • is breathing voluntary or involuntary?
    involuntary
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  • are bones rigid or flexible?
    rigid
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  • are muscles hard or elastic?
    elastic
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  • where does our body bend?
    at joints
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  • do the ribs protect the brain, or heart and lungs?
    heart and lungs
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  • how long is it betwen when an egg is fertilized and a baby is born?
    9 months
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  • where does the fertilixzed egg go?
    to the uterus
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