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4th Grade Human Machine Review
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Which part of our eye acts like a screen?
retina
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What is a pupil?
The dark hole in the center of the eye
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Why do our pupils get larger in a dark room?
to let in more light so we can see
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What part of the eye is in the front?
cornea lens
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Name one thing our brains do
makes decisions, stores memories, holds our emotions
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What is the difference between human eyes and a nocturnal animal's eyes?
human eyes have smaller pupils and no reflective layer
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The brain sends a message with the ________ to the rest of the body.
nerves
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What kind of animals sleep during the day and are most active at night?
nocturnal animals
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What causes people to have blurry vision?
Their retina is too close or too far away from their cornea lens.
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Which part of the body makes us move: bones, muscles, tendons?
muscles
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Nocturnal animals have __________ white in their eyes, unlike humans.
none or little
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Which nerves send messages from our senses to our brains?
sensory nerves
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Describe what happens in the body step by step when a mouse sees a cat
the mouse's eyes see the cat and send a message to the brain, the brain decides to move and sends a message to the leg muscles, the mouse runs away
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Which nerves send messages from our brain to our muscles?
motor/movement nerves
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What comes next after: "the senses send messages to the brain"
the brain makes a decision and thinks
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What are the strings called that connect our muscles and bones?
tendons
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When an owl catches prey, what is the next step directly after the sensory nerves send the message from the eyes to the brain?
the brain sends a message along the motor/movement nerves to the muscles
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What would happen if we didn't have bones?
We couldn't move and we wouldn't be able to stand up.
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