Science of Technology End of Unit
Quiz by Megan McMillen
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18 questions
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- Q1Which of the following describes an adhesive bond?Glue that uses ionic bonds to stick to materialGlue that sticks to the substrate materialGlue that sticks to itselfGlue that changes from a fluid to a solid30s
- Q2What does “freezing point” mean?The temperature at which a solid becomes a liquidThe temperature at which a liquid becomes a solidThe temperature at which a solid becomes a gasThe temperature at which a liquid becomes a gas30s
- Q3Why does oil not dissolve in water?Oil has less mass than water, which causes the oil to floatOil has magnetic properties that allow it to floatOil absorbs heat and because heat rises, the oil floatsOil has more mass than water, which causes the oil to sink30s
- Q4Why does ice melt when salt is added?Salt lowers the freezing point of iceIce does not melt when salt is addedSalt raises the freezing point of iceSalt is warmer than ice30s
- Q5Why is it good to use salt with the ice when making ice cream?Salt raises the freezing point of the milk mixture, so the ice can freeze it betterSalt lowers the freezing point of the ice, so the heat is absorbed betterSalt lowers the freezing point of the ice, so more cold can be absorbed by the milk mixtureSalt lowers the freezing point of the milk mixture, so it turns to ice cream faster30s
- Q6What is a cohesive failure?A failure with an adhesive that leaves the adhesive on only one side of the substrateA failure of an adhesive that leaves adhesive on both sides of the substrateA failure of an adhesive that leaves no adhesive on either side of the materialA failure of an adhesive that tears the material on which it is being tested30s
- Q7Which of the following is NOT one of the six steps in the Design Process?Generate ConceptsDevelop SolutionDecision MatrixDefine Problem30s
- Q8Which of the following would need to be measured on the nanoscale?Strand of hairDNARaindropGrain of salt30s
- Q9What is nanotechnology?Nanotechnology is a series of steps that engineers follow to come up with a solution to a problemNanotechnology is building innovative tools to study and manipulate objects at the nanometer scale, one billionth of a meterNanotechnology is a spring fixed at one end with a hook to attach an object at the otherNanotechnology is an inexpensive way to change the color of automobiles30s
- Q10What does the prefix “nano” mean?One billionthOne millionthOne tenthOne trillionth30s
- Q11What is a major challenge of using nanotweezers under a microscope to analyze molecules?Molecules cannot be separated under a microscope so nanotweezers do not workMaterials are sticky at the nanoscale, which makes it hard to put the molecules back down after picking them up with the nanotweezersMaterials are slippery at the nanoscale, which makes it hard to use the nanotweezers to pick molecules upMolecules are too small to pick up with the nanotweezers30s
- Q12Which of these products is already being made using nanotechnology methods?FabricsSunscreenGolfballAll of them30s
- Q13The smallest unit of a chemical element, made up of a nucleus surrounded by electronsatom30s
- Q14Substance made up of two or more elements, such as water (H2O), carbon dioxide (CO2), or table sugar (C12H22O11).compound30s
- Q15A combination of different things in which the components are individually distinctmixture30s