New York State Chemistry RegentsNew York State Earth Science Regents

 
Laboratory Skills: Scientific Inquiry and Techniqu
Living Environment Regents June 2007 Question 52 PDF Print E-mail
NYS Living Environment Regents June 2007

lejun07q52

Based on the results of the experiment, the higher the temperature, the faster is the rate of gas production. After 25 minutes, the 35oC setup yielded more bubbles than the 20oC setup.

 
Living Environment Regents June 2007 Question 51 PDF Print E-mail
NYS Living Environment Regents June 2007
lejun07q51

lejun07q51-answer
 
Living Environment Regents June 2007 Question 50 PDF Print E-mail
NYS Living Environment Regents June 2007
lejun07q50
 
Living Environment Regents June 2007 Question 49 PDF Print E-mail
NYS Living Environment Regents June 2007
lejun07q49
 
Living Environment Regents June 2007 Question 31 PDF Print E-mail
NYS Living Environment Regents June 2007

lejun07q31

Correct Answer: Option 2 90mm

Approximation or estimation typically means finding upper or lower bounds of a quantity that cannot readily be computed precisely and is also an educated guess. Since we are limited by the ruler, we will just estimate the length of the earthworm based on the number of centimeters covered. One centimeter is composed of 10 millimeters. Based on the diagram, the earthworm covered 9cm which is equal to 90mm.

 
Living Environment Regents June 2008 Question 79 PDF Print E-mail
NYS Living Environment Regents June 2008
image079

Correct Answer: Option 2
 
Living Environment Regents June 2008 Question 77 PDF Print E-mail
NYS Living Environment Regents June 2008
image076-77-A
Starch is often used in chemistry as an indicator for redox titrations where iodine is present. Starch forms a very dark blue-black complex, with iodine. The indicator is not affected by the presence of iodide (I-). Starch forms an unstable complex (blue colored) in low concentrations of Iodine.

Correct Answer: Turning of the dark blue-black complex with iodine.
 
Living Environment Regents June 2008 Question 73 PDF Print E-mail
NYS Living Environment Regents June 2008
image073
Correct Answer: Some reasons why scientists might want to know if two plant species are closely related are -

  • A related plant might provide a cheaper source of a substance.
  • Two related plants could produce similar substances of medicinal value to be used for production of medicines
 
Living Environment Regents June 2008 Question 72 PDF Print E-mail
NYS Living Environment Regents June 2008
image072
Correct Answer:
  • DNA Sequences
  • Variety of enzymes present
  • Structure of molecules present
 
Living Environment Regents June 2008 Question 71 PDF Print E-mail
NYS Living Environment Regents June 2008
image071
Correct Answer: A and C most of the characteristics are similar or same type of chlorophyll is present
 
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