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Practice Reading: Fill in the Blanks (Dropdown) ID: #51208 Body Energy
Instructions ›
Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate choice for each blank.
* Select the correct answer into all dropdown fields. You need to answer all questions before clicking verify button.
If  you've  ever  had  to  pick  up  and  carry  a  tired  child  through  the  mall,  you  know  that  walking  sometimes  tuckers  out  the  .  Now  scientists  think  they  know  why.  The  results  appear  in  the  Journal  of  Experimental  Biology.  Larger  animals  tend  to  use  less  energy  per  gram  of  body    than  smaller  ones  do,  even  at  rest.  But  what  happens  when  they're  in  motion?  Researchers    walkers  of  different  ages  and  sizes,  from  a  three-foot-tall  kindergartner  to  a  six-foot  adult.  While  the  subjects  logged  miles  on  the  treadmill,  the  scientists    their  stride  and  metabolism.  And  they  found  that  people  pretty  much  walk  the  same  way,  regardless  of  their  stature.  If  you  scaled  a  five-year-old  up  to  be  six-and-a-half  feet  tall,  the  giant  child  would  lope  along  just  like  a  similarly  sized  adult.  What's  more,  walkers  of  all  heights  use  the  same  amount  of  energy  per  step.  That  means  that  big  people  don't    energy  by  strolling  in  a  more  economical  style.  They  expend  less  energy  because—just  as  you  may  have  always  suspected  —they  simply  need  fewer  strides  to  cover  the  same  ground.  Which  means  that  for  some  people  a  walk  in  the  park  ain't  necessarily  a  walk  in  the  park.

Result:

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Correct answer: toddlers

Explanation: The word 'toddlers' fits grammatically as it is a plural noun that refers to young children, which aligns with the context of carrying a tired child. The sentence discusses the experience of carrying children, making 'toddlers' the most relevant choice.

Meaning: 'Toddlers' refers to young children, typically between the ages of one and three, who are just beginning to walk and may tire easily.

Wrong options:

  • precursors: The term 'precursors' refers to something that comes before another, which does not fit the context of children being carried.
  • doctors: 'Doctors' refers to medical professionals and is unrelated to the context of carrying children.
  • battles: 'Battles' refers to conflicts or fights, which is not relevant to the context of tired children.
Correct answer: mass

Explanation: The word 'mass' is the correct choice as it refers to the amount of matter in an object, which is relevant in the context of energy usage in animals. The sentence discusses energy expenditure per gram of body mass, making 'mass' the appropriate term.

Meaning: 'Mass' refers to the quantity of matter in an object, typically measured in grams or kilograms, and is crucial in understanding energy expenditure.

Wrong options:

  • space: The term 'space' refers to a physical area and does not relate to the context of energy usage in animals.
  • tissue: 'Tissue' refers to a group of cells working together, which does not fit the context of energy per gram of body measurement.
  • velocity: 'Velocity' refers to speed in a given direction, which is not relevant to the discussion of energy expenditure.
Correct answer: recruited

Explanation: The word 'recruited' is appropriate as it indicates that researchers enlisted participants for their study. This fits grammatically and contextually, as it describes the action of gathering walkers for research purposes.

Meaning: 'Recruited' means to enlist or gather people for a specific purpose, in this case, for a scientific study.

Wrong options:

  • advised: 'Advised' means to give recommendations, which does not fit the context of gathering participants for a study.
  • dismissed: 'Dismissed' means to reject or send away, which is contrary to the action of gathering participants.
  • regretted: 'Regretted' means to feel sorrow or remorse, which does not relate to the action of gathering participants.
Correct answer: measured

Explanation: The word 'measured' fits well as it indicates that scientists quantified the stride and metabolism of the subjects. This aligns with the context of conducting a scientific study and is grammatically correct.

Meaning: 'Measured' means to assess or quantify something, in this case, the stride and metabolism of the participants during the study.

Wrong options:

  • presented: 'Presented' means to show or display, which does not fit the context of quantifying stride and metabolism.
  • microsecond: 'Microsecond' is a unit of time and does not fit grammatically or contextually in this sentence.
  • thickened: 'Thickened' means to make something denser or more viscous, which is unrelated to the context of measuring stride and metabolism.
Correct answer: conserve

Explanation: The word 'conserve' is the correct choice as it means to save or use resources sparingly. In this context, it indicates that larger individuals do not save energy by walking in a more economical manner, fitting both grammatically and contextually.

Meaning: 'Conserve' means to save or protect something from being wasted, in this case, energy while walking.

Wrong options:

  • valve: 'Valve' refers to a device that controls the flow of a fluid, which is unrelated to the context of energy expenditure.
  • masterworks: 'Masterworks' refers to outstanding works of art or literature, which does not fit the context of energy usage.
  • slurs: 'Slurs' refers to derogatory remarks or to speak indistinctly, which is not relevant to the discussion of energy conservation.

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