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What do all chemical reactions need to get started?

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What can be calculated by solving the average speed formula?

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What are the sharp projections that specialized cells grow called?

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What is a fibrocartilaginous pad that fills the gap between adjacent vertebral bodies?

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What broad group of animals - which includes rats, dogs and camels - have highly developed brains and often perform work for humans?

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What do you call the illness that occurs when harmful bacteria enter the digestive system in food?

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What do skeletal muscles enable the body to do?

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What does rising and sinking air influence in a region?

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What is characterized by uncontrolled cell division of abnormal cells?

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What element on the periodic table forms the most diverse compounds?

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What is the largest organelle in a eukaryotic cell?

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What is the earliest reptile?

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What is a sac-like organ at the end of the esophagus?

asked Jan 6 in Science by TaraCrommeli (570 points)

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What forms when a glacier scrapes a large hole in the ground?

asked Jan 6 in Science by DevonGreeves (390 points)

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What is the distance north or south of the equator called?

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What does fog consist of?

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What happens to the temperature of a system during phase change?

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What is a relationship between living things that depend on the same resources?

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What effect in the atmosphere ensures that the earth maintains the correct temperature to support life?

asked Jan 6 in Science by SpencerRagga (790 points)

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What do ocean mollusks use to absorb oxygen from the water?

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