PLTW FINAL QUESTIONS AND ANSWERS 100%
CORRECT | LATEST UPDATE 2025
Referencing one item you documented in your search, explain why taking precise
measurements is important when investigating a case. - ANSWER It can ensure
that your results are reliable and can help you reconstruct the scene. For example,
we measured the distance from a table to Anna and even wrong measurements
when we did experiments like gel electrophoresis.
Why are multiple forms of documentation used at the scene of a mysterious death
(note taking, sketching, photography, or videography)? What are some potential
benefits of each? - ANSWER To conduct a thorough investigation.
Photographing a crime scene helps you show what actually happened and clearly
see what is going on in the crime scene. Note taking helps you gather more
evidence and additional information, you can write down your thoughts and what
you did. Videography helps you better see and hear what is going on in the crime
scene, it shows you more angles. Sketching helps you draw out what is on the
crime scene and the measurements of that.
How are your respiratory rate and heart rate related? - ANSWER Your
respiratory rate and heart rate are used in a polygraph test. Your respiratory rate
and heart rate can increase and decrease when you are telling the truth or lying.
Your heart rate cannot be controlled but your respiratory rate can.
Describe two ways the experimental design process can be used in medicine or
health care. - ANSWER It helps you develop a procedure to test and develop
medicine and see if it is safe. It helps you know exactly what you did so that you
can repeat the process and get the same results.
, Even though fingerprints typically remain unchanged throughout a person's life,
some injuries can wear away fingerprints. What might be some ways in which a
person could lose or alter their fingerprint? - ANSWER Burns, cuts
Explain how interaction with specific apps on a smartphone can be used to trace
the movements of a victim or a potential suspect. How might this evidence be
used to help prove a suspect's guilt? - ANSWER It traces their location, times,
and actions.
If you were to repeat the blood spatter lab, how could you change your
experimental design to yield more accurate results? - ANSWER Steadier
movements, exact same amount of volume of blood, and from the exact same
height.
What other test(s) could you perform on blood to better identify an individual? -
ANSWER Blood typing and gel electrophoresis.
DNA has two strands. If the sequence of nucleotides of one strand was known, is
it possible to use that information to determine the sequence of the second
strand? Explain your reasoning for your response using an example DNA
sequence. - ANSWER Yes, the pairs complement each other and go together. A
goes with T and G goes with C so you can figure it out.
Can you be framed by your own DNA? How might an individual's own cells lead to
false verdicts of guilt? In your explanation, provide one scenario in which this
might occur. - ANSWER Yes, DNA is transferred so easily, for example, if you
touch your friend's backpack, and they take it home with them, your DNA is on
the backpack at their house.
CORRECT | LATEST UPDATE 2025
Referencing one item you documented in your search, explain why taking precise
measurements is important when investigating a case. - ANSWER It can ensure
that your results are reliable and can help you reconstruct the scene. For example,
we measured the distance from a table to Anna and even wrong measurements
when we did experiments like gel electrophoresis.
Why are multiple forms of documentation used at the scene of a mysterious death
(note taking, sketching, photography, or videography)? What are some potential
benefits of each? - ANSWER To conduct a thorough investigation.
Photographing a crime scene helps you show what actually happened and clearly
see what is going on in the crime scene. Note taking helps you gather more
evidence and additional information, you can write down your thoughts and what
you did. Videography helps you better see and hear what is going on in the crime
scene, it shows you more angles. Sketching helps you draw out what is on the
crime scene and the measurements of that.
How are your respiratory rate and heart rate related? - ANSWER Your
respiratory rate and heart rate are used in a polygraph test. Your respiratory rate
and heart rate can increase and decrease when you are telling the truth or lying.
Your heart rate cannot be controlled but your respiratory rate can.
Describe two ways the experimental design process can be used in medicine or
health care. - ANSWER It helps you develop a procedure to test and develop
medicine and see if it is safe. It helps you know exactly what you did so that you
can repeat the process and get the same results.
, Even though fingerprints typically remain unchanged throughout a person's life,
some injuries can wear away fingerprints. What might be some ways in which a
person could lose or alter their fingerprint? - ANSWER Burns, cuts
Explain how interaction with specific apps on a smartphone can be used to trace
the movements of a victim or a potential suspect. How might this evidence be
used to help prove a suspect's guilt? - ANSWER It traces their location, times,
and actions.
If you were to repeat the blood spatter lab, how could you change your
experimental design to yield more accurate results? - ANSWER Steadier
movements, exact same amount of volume of blood, and from the exact same
height.
What other test(s) could you perform on blood to better identify an individual? -
ANSWER Blood typing and gel electrophoresis.
DNA has two strands. If the sequence of nucleotides of one strand was known, is
it possible to use that information to determine the sequence of the second
strand? Explain your reasoning for your response using an example DNA
sequence. - ANSWER Yes, the pairs complement each other and go together. A
goes with T and G goes with C so you can figure it out.
Can you be framed by your own DNA? How might an individual's own cells lead to
false verdicts of guilt? In your explanation, provide one scenario in which this
might occur. - ANSWER Yes, DNA is transferred so easily, for example, if you
touch your friend's backpack, and they take it home with them, your DNA is on
the backpack at their house.
