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LS15 MIDTERM - UCLA Phelan Practice Questions and Answers

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  • Course
  • LS15
  • Institution
  • University Of California - Los Angeles

LS15 MIDTERM - UCLA Phelan Practice Questions and Answers 1. Scientific thinking, what is it for? and be able to use it - Answer️️ - scientific thinking - Answer️️ -- empirical (based on observations and experiences not solely logic) - self correcting - observation - hypotheses - pr...

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  • August 28, 2024
  • 26
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • University Of California - Los Angeles
  • LS15
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SophiaBennett
©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

LS15 MIDTERM - UCLA Phelan
Practice Questions and Answers

1. Scientific thinking, what is it for? and be able to use it - Answer✔️✔️-

scientific thinking - Answer✔️✔️-- empirical (based on observations and
experiences not solely logic)

- self correcting

- observation

- hypotheses

- predictions

- experiments

- conclusions (modify hypotheses, and continue the process)

scientific method - Answer✔️✔️-- organized

- empirical

- methodical

- structured way of finding information about observable events in nature

- lets us reject hypotheses about how the world works

steps of the scientific method - Answer✔️✔️-1. make observations

2. formulate hypotheses - is it testable? refutable?


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,©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

3. make a prediction

4. conduct an experiment - control all variables BUT one, randomized,
double blind

5. analyze results, draw a conclusion (if evidence disproves hypothesis,
construct a new hypothesis)

6. report results

is the scientific method flexible? - Answer✔️✔️-yes! it doesn't have to be step
by step

what does a "critical experiment" do - Answer✔️✔️-put a hypothesis to the
test, the results can decisively determine whether a hypothesis is correct

class examples of scientific method - Answer✔️✔️-- does it rain more on
weekends?

- real vs artificial vanilla

- "maze bright" vs "maze dull" rats

class example: does it rain more on weekends? - Answer✔️✔️-- find average
Monday and Saturday rainfall; rains 22% more on Saturdays

- hypothesis: particular matter from car exhaust builds up during the week
leading to cloud formation and then rain on the weekends

- experiment: collect data from somewhere with no cars (ocean)

- results: there is equal rainfall on each day in the ocean, PROVING that car
exhaust affects the trend of more rain on weekends
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, ©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

class example: real vs artificial vanilla in chocolate chip cookies -
Answer✔️✔️-- Phelan baked batches of cookies with real vanilla and with
artificial vanilla

- asked wife which one tasted better

- concluded that there was no difference in taste between the types of
vanilla used

class example: is maze running genetic in mice? - Answer✔️✔️-- have "maze
dull" and "maze bright" mice

- with each generation, test all mice for maze learning ability and breed
only the top 20% and bottom 20%

- observe new generations

- conclusion: over time, the extremes got more and more exaggerated

- maze running is not genetic but the allele for fear is in mice; less fear =
solve maze quicker, more fear = solve maze slower

how to increase experiment's power - Answer✔️✔️-- randomize subjects

- control your study

- use a double-blind design



R.C.D. - rat's cause diseases




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