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15 Cards in this Set
- Front
- Back
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which of these reduces friction? (a)car brakes (b)tire tread (c)ball bearing (d)sand paper |
ball bearing |
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when a lobster grows a claw to replace one that was lost,the process is called? (a)restoration (b)restraction (c)regeneration (d)reproduction |
regeneration |
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Any astronomical body that revolves around a larger body is called? (a)a nova (b)a comet (c)a satellite (d)a meteoroid |
a satellite |
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in chemistry,to be classified as an organic substance,a substance must contain? (a)sugar molecules (b)sodium Atoms (c)carbon atoms (d)water molecules |
carbon atoms |
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which elements does not contain neutrons? (a)iron (b)carbon (c)oxygen (d)hydrogen |
hydrogen |
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the chemical formula of a compound describes the elements,the compound and the? (a)ph of the compound (b)conduction of the compound (c)ratio of the element in the compound (d)ratio of neutrons to protons in each element |
ratio of element in the compound |
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what is the symbol of hydroxyl ion? (a)H+ (b)OH- (c)H2O (d)H30 |
OH- |
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the tympanic membranes are also known as the? (a)eye lids (b)sinuses (c)eardrums (d)vocal cords |
eardrums |
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which of the following action producea chemical? (a)boiling water (b)burning the rice (c)adding salt to the hot water (d)melting butter on cooked rice |
adding salt to the hot water |
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choking is prevented by the? (a)diaphram remaining down (b)vibration of the vocal cords (c)esophagus moving the food (d)epiglottis covering the voice box |
epiglottis covering the voice box |
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what do hydrogen molecules and oxygen molecules have in common? (a)atomic structure (b)the charge in each electron (c)the number of protons (d)the size |
the size |
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which of the folloeing is a non renewable resource? (a)wood (b)water (c)copper (d)biomass |
wood |
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A perprtual motion machine can never be built because it is not possible to eliminate? (a)momentum (b)inertia (c)elasticity (d)friction |
elasticity |
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which of the following is arenewable resource? (a) copper (b)aluminium (c)peanut oil (d)natural gas |
peanut oil |
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when scientists measure a liquids resistance to flow,they are measuring the liquids? (a)density (b)solubility (c)viscosity (d)permeability |
viscosity |
