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What is the membrane that surrounds a fetus called?

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What is the name for a molecule with two atoms?

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What is the term for a symbiotic relationship in which one species benefits while the other species is not affected?

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What is produced by the reaction of metal oxide with water?

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What happens when heated water is released into a body of water?

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What subject is a way of learning about the natural world that is based on evidence and logic?

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What process enables all living things to maintain a constant internal environment?

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What do rocket-based systems use to propel itself into space?

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What results when a warm air mass runs into a cold air mass?

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What nerves attached to the brain are mainly responsible for motor and sensory functions?

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What is the movement of substances across the membrane without the expenditure of cellular energy called?

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What structures are located on roof of the nasopharynx and on each side of the pharynx?

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What organisms known as decomposers break down wastes and dead organisms into smaller molecules?

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What is the the basic si unit for mass?

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What is the movement of muscle in the digestive system called?

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What is the movement of animals from one place to another?

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What is the name of the major components of cell membranes called?

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What forms when cells start to grow out of control?

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What prevents soil erosion on a hillside that is being farmed?

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What is the major artery of the body, taking oxygenated blood to the organs and muscles of the body?

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