Questions and Answers
What is the hypothesis for the study presented in the article 'Diabetes Study Ends Early With a Surprising Result'?
Identify the independent (IV) and dependent (DV) variables for the reported study.
Identify the control variables for the reported study.
What was the result of the study?
Signup and view all the answers
What is the assumption made by the students regarding Brassica rapa seedlings?
Signup and view all the answers
Which student's statement about assumptions in lab reports do you agree with most?
Signup and view all the answers
When discussing assumptions in lab reports, what is the best action to take?
Signup and view all the answers
What can be said about the relationship between mass hung and the period in a springmass system?
Signup and view all the answers
What claim can be made about the relationship between mass hung and spring stretch?
Signup and view all the answers
What are the primary limitations to the study design investigating postmenopausal hormones on breast cancer risk?
Signup and view all the answers
Evaluate the strength of the claim: 'For every hour of television watched after age 25 it shortens the viewer's life expectancy by 21.8 minutes'.
Signup and view all the answers
What represents possible dependent and independent variables for the investigation involving the percent survival of cell cultures?
Signup and view all the answers
What is correct about the moment of inertia of an ice skater as she spins?
Signup and view all the answers
What represents possible dependent and independent variables for the investigation measuring plant growth?
Signup and view all the answers
Which object will reach the bottom of the ramp first when released together from the same height?
Signup and view all the answers
What is a possible hypothesis for the investigation showing carbon dioxide levels?
Signup and view all the answers
Based on the lab notes, what statement is best about the moment of inertia I?
Signup and view all the answers
What's a possible hypothesis for the investigation depicted by the enzyme graph?
Signup and view all the answers
How can the engine of a small airplane, specified to have a torque of 60 N m, be modeled in terms of moments of inertia?
Signup and view all the answers
If the researcher selects container 5, what conditions should she choose for container 6 to test her hypothesis?
Signup and view all the answers
Which claim would both students regarding the mass of water be likely to make?
Signup and view all the answers
What is the angular acceleration of a large cylindrical spool of light string with a radius of 0.3 m and mass of 25 kg when pulled with a force of 55 N?
Signup and view all the answers
What claim can the student make after measuring the temperature before and after the chemical reaction?
Signup and view all the answers
What can be concluded about the value of the object's true mass?
Signup and view all the answers
Which statement correctly describes which daughter has more uncertainty in her measurements of the tomato plant height?
Signup and view all the answers
What conclusion may be drawn about the price of apples, plums, and oranges using the data collected from grocery stores?
Signup and view all the answers
What claim can the student make about the mass of a solution after measuring it before and after a chemical reaction?
Signup and view all the answers
What mathematical model best describes the relationship between the temperature of a steel beam and its length?
Signup and view all the answers
Which type of curve most likely fits the data representing the relationship between the radius of a cylinder and its volume?
Signup and view all the answers
Which of the following mathematical models best fits the time it takes to travel based on different speeds?
Signup and view all the answers
What claim can a group of students make regarding their measured distance and the theoretical value?
Signup and view all the answers
If the stopwatch used to measure the period of a pendulum is running slow, what is the correct statement?
Signup and view all the answers
How should a student handle the systematic error of a photogate that consistently reads 5% higher?
Signup and view all the answers
What is the correct perimeter of the living room with length and width measured to be 5.5 m and 4.8 m respectively?
Signup and view all the answers
Using the high/low method, what is the best approximation of the uncertainty in the volume of a cylindrical gas bottle?
Signup and view all the answers
What is the best interpretation if the group's uncertainty was overestimated after 40 launches?
Signup and view all the answers
If another pattern appears showing measurement inconsistencies, what does this indicate?
Signup and view all the answers
What type of correlation exists regarding the number of months people own a treadmill and their hours spent exercising?
Signup and view all the answers
What correlation exists between SAT scores and family income?
Signup and view all the answers
What type of relationship exists between the height of a table and the range of a ball projected from it?
Signup and view all the answers
Study Notes
Cell Culture Experiment
 HeLa, stem, kidney, and T cells were used to assess survival rates under three treatments.
 HeLa cells: 79% (A), 25% (B), 54% (C); Survival rates vary significantly by treatment.
 The independent variable: treatment; dependent variable: percent survival of cell cultures.
Plant Growth Experiment
 Average growth of plants is measured under three different lighting conditions over 10 days.
 Independent variable: lighting conditions; dependent variable: plant growth.
Carbon Dioxide Levels Measurement
 CO2 levels measured annually at Mauna Loa Observatory indicate an increase over decades.
 Hypothesis: The amount of atmospheric CO2 is related to the year it was measured.
Enzyme Experiment
 Two enzymes compared for product production efficiency based on reaction temperature.
 Hypothesis: The amount of product created is related to the temperature of the reaction.
CO2 Absorption in Plants
 Research involved different plant parts in sealed containers to assess CO2 absorption.
 Container 6 hypothesis: Myrtle leaf, orange light, at 27°C was selected for varied testing conditions.
Mass of Water During Heating
 Two students measure the mass of water and discuss changes during heating with different uncertainties.
 Claims reflect differing conclusions based on experimental range of uncertainty.
Chemical Reaction Temperature Measurement
 Student evaluates temperature consistency before and after a reaction, factoring in measurement uncertainty.
 Claim: Uncertain if temperature changed, but reasonable to suggest it remained constant due to overlapping uncertainties.
True Mass Value Interpretation
 Best claim regarding the object's true mass is that more data is needed or true value cannot be precisely known due to measurement variations.
Measurement Uncertainty in Plant Growth
 Comparison of height measurements from a student and her daughters indicates differing uncertainty.
 Elizabeth shows more measurement uncertainty based on discrepancies compared to consistent measurements from Tom.
Fruit Price Comparison
 Average prices collected from various stores for apples, plums, and oranges show a cost similarity affected by overlapping error bars.
 Conclusion: Prices of oranges and apples are similar, but plums are less expensive.
Measurement Consistency PostChemical Reaction
 Student's consistent measurements of a solution's mass suggest no change, backed by overlapping uncertainty ranges.
Mathematical Model for Relationships
 Bestfit mathematical model for steel beam length in relation to temperature is linear (L = αT + β).
 A power relationship likely describes the correlation between a cylinder's radius and its volume.
Projectile Motion and Relationships
 Causal relationship exists between the height of a table and range if horizontal velocity and gravity are held constant.
Diabetes Study Hypothesis
 The study hypothesizes that diet and exercise impact cardiovascular risk factors in diabetics.
Independent and Dependent Variables in Diabetes Study
 Independent variable: level of diet and exercise; dependent variable: rate of heart attacks, strokes, and cardiovascular deaths.
Control Variables in Diabetes Study

Control factors include daily diet (# of calories per day), level of exercise (minutes per day), participant details (Type 2 diabetes, overweight, and male).### Study Notes

Experimental Results and Hypothesis: Study results refuted the initial hypothesis regarding an impact on a factor being tested.

Benefits of Coffee Grounds for Plants: Coffee grounds enhance plant growth by releasing nitrogen, magnesium, zinc, and amino acids, important for energy use and protein synthesis. They also improves soil structure and aids in moisture retention.

Hypothesis on Brassica Rapa Growth: Students assumed that the health of Brassica rapa seedlings was consistent across all planted pots, which is appropriate as plant health influences leaf growth.

Mold Growth Experiment on Bread: Students investigated the effect of preservatives and temperature on mold growth in bread. Assumptions included that the bread loaves were identical and that measuring methods used for mold growth were accurate.

Assumptions in Lab Reports: It is vital to list assumptions in lab reports and discuss their potential impact on results and improvements for future experiments.

Oscillating SpringMass System: Students found that variations in mass hung on different springs did not establish a clear relationship due to uncontrolled variables in their experiment.

Hooke's Law and Spring Stretch: There is a causal relationship between the mass hung on a spring and its stretch, as per Hooke's Law, establishing a connection between applied force and displacement.

Breast Cancer Study Limitations: Factors influencing study outcomes include discrepancies in mammogram frequency among hormone replacement therapy users, other known risk factors such as smoking, and the overall sample size.

Claim from TV Viewing Study: Skepticism surrounds the claim linking television viewing time after age 25 to diminished life expectancy; concerns include selfreporting biases and participant representativity.

Moment of Inertia in Skating: The moment of inertia increases with arms extended away from the rotation axis, demonstrating principles of rotational dynamics.

Rolling Objects Race Prediction: Among a solid sphere, a hoop, and a cylinder, the sphere will reach the bottom of a ramp first, followed by the cylinder and then the hoop, due to differing moments of inertia.

Causal Relationship in Moment of Inertia: A clear causal relationship exists between the mass distribution of an object and its moment of inertia.

Modeling Torque in Plane Propeller: The propeller of a small airplane can be modeled as a rod rotating about its center when analyzing torque and inertia.

Angular Acceleration of a Spooling String: Given the force and dimensions of a rotating cylindrical spool, the calculated angular acceleration is 14.7 rad/s².
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the effects of different treatments on various cell types in a controlled laboratory setting. This quiz tests knowledge on cell culture survival rates and related concepts. Ideal for students studying biology or physics in lab contexts.