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Which of these is the best explanation of how a smooth round stone became smooth? A. continuous freezing and thawing B. volcanic action C. it fell off the side of a cliff D. it was in a stream for a long time - ✔✔D. it was in a stream for a long time When a lobster grows a claw to replace one that was lost, the process is called A. restoration B. retraction C. regeneration D. reproduction - ✔✔C. regeneration Any astronomical body that revolves around a larger body is called
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Which of these is the best explanation of how a smooth round stone became smooth? A. continuous freezing and thawing B. volcanic action C. it fell off the side of a cliff D. it was in a stream for a long time - ✔✔D. it was in a stream for a long time When a lobster grows a claw to replace one that was lost, the process is called A. restoration B. retraction C. regeneration D. reproduction - ✔✔C. regeneration Any astronomical body that revolves around a larger body is called A. a nova B. a comet C. a satellite D. an astroid E. a meteoroid - ✔✔C. a satellite In chemistry, to be classified as an organic substance must contain
A. sugar molecules B. sodium atoms C. carbon atoms D. water molecules - ✔✔C. carbon atoms According to their locations on the Periodic Table, argon (Ar) and neon (Ne) are A. ionic B. radioactive C. liquid metals D. noble gases - ✔✔D. noble gases To test the effectiveness of plant fertilizer, groups of plants are grown with different types of fertilizer. A control group of plants would A. not be given any fertilizer B. be grown with a mixture of all fertilizers C. not be needed unless the results were unclear D. be grown in a different location from the other groups - ✔✔A. not be given any fertilizer When scientists measure a liquid's resistance to flow, they are measuring he liquid's A. density B. solubility C. viscosity D. permeability - ✔✔C. viscosity Regeneration in man is limited to
A. fish B. crabs C. sharks D. plankton - ✔✔D. plankton Using the list, which of the following presents the stages of the water cycle in the correct order?
the tympanic membranes are also know as - ✔✔eardrums when sodium atoms form sodium ions they - ✔✔share electrons or sodium loses electron which of the following is an renewable resources - ✔✔natural gas the filament in an electric light bulb is made from - ✔✔tungsten a human skin cell divides by - ✔✔mitosis what are the two main gases that make up the stars - ✔✔hydrogen and helium