1 Waseem is collecting data on the melting points of different substances. He wants to compare the melting points. Which type of graph is most appropriate? A Line graph B Pie chart C Bar graph D Scatter plot
2 Hina is analyzing data from an experiment and notices that some data points are significantly different from others. What should she do with these outliers? A Ignore them completely B Include them without any consideration C Investigate possible reasons for the outliers and decide whether to include or exclude them D Change them to fit the expected results
3 Emma is recording the temperature of a solution at regular intervals. She creates a table to organize her data. What is the first step in data analysis after collection? A Drawing conclusions B Organizing and presenting the data in tables or graphs C Discarding data that does not fit D Changing the hypothesis
4 Which vitamin group is called B-complex? A Fat soluble vitamins B Water soluble vitamins C Steroid vitamins D Hormonal vitamins
5 Chloe is measuring the mass of a reactant before and after a chemical reaction. She uses a balance and records the values in grams. What is the purpose of collecting empirical data in this experiment? A To prove a theory without experimentation B To gather evidence to support or refute a hypothesis C To make the experiment more complex D To replace the need for a hypothesis
7 Qasim is learning about the functions of food components. He understands that proteins are important for growth and repair. Which of the following is a source of protein? A Rice B Chicken C Butter D Sugar
8 Oliver is studying the rate of a chemical reaction by measuring the change in concentration over time. He plots a graph of concentration vs. time. What can he determine from the slope of the graph? A The equilibrium constant B The rate of reaction C The activation energy D The enthalpy change
9 Nora is analyzing data from a reaction. She calculates the rate of reaction from the slope of a concentration vs. time graph. What does a steeper slope indicate? A A slower reaction rate B A faster reaction rate C The reaction has stopped D No change in reaction rate
10 Victor is analyzing data from a reaction. He notices that the data points on his graph form a straight line. What does a straight line graph indicate about the relationship between variables? A It is a direct proportional relationship B It is an inverse relationship C There is no relationship D It is a quadratic relationship
11 Khalid is analyzing data and finds that the mean is 5.2 and the median is 5.0. What does this suggest about the data? A The data is perfectly symmetrical B The data is slightly skewed C The data has no outliers D The data is invalid
12 Which bond stabilizes secondary structure of proteins? A Peptide bond B Hydrogen bond C Ionic bond D Covalent bond
13 Analyzing data means: A Ignoring results B Organizing and interpreting results C Repeating experiment D Changing hypothesis
14 Scientific investigation mainly involves: A Guessing results B Systematic observation and experimentation C Memorizing facts D Random testing
15 Xia is analyzing data from an experiment and finds a correlation between two variables. What does a correlation indicate? A That one variable causes the other B A relationship between two variables C That there is no relationship between the variables D That the data is invalid
16 David is studying biochemistry. He learns that biochemistry is the study of chemical processes in living organisms. Which of the following molecules is a major focus of biochemistry? A Sodium chloride B DNA C Carbon dioxide D Water
18 Rachel is analyzing data from an experiment. She finds that the median and mean are different. What does this indicate about the data distribution? A The data is normally distributed B The data is skewed C The data has no outliers D The data is perfectly symmetrical
19 Which statement best describes a conclusion? A A guess before experiment B A summary based on data C Raw data D A hypothesis
20 David is analyzing data from an experiment on the rate of reaction. He calculates the average rate from multiple trials. Why is it important to repeat experiments and collect multiple data points? A To increase the accuracy and reliability of the results B To make the experiment more time-consuming C To confuse the results D To avoid using a control
21 Ahmed is collecting data on the pH of different solutions. He uses a pH meter to measure the pH. What type of data is pH measurement? A Qualitative data B Quantitative continuous data C Quantitative discrete data D Ordinal data
22 Proteins are essential for: A Energy storage only B Growth and repair of tissues C Photosynthesis D Respiration
23 The first step in a scientific investigation is: A Conclusion B Experiment C Observation D Data analysis
25 Amino acids are linked together by: A Hydrogen bonds B Ionic bonds C Peptide bonds D Disulfide bonds
28 Ibrahim is learning about proteins. He knows that proteins are essential for growth and repair. What is the basic building block of proteins? A Nucleotides B Amino acids C Fatty acids D Monosaccharides
29 Tina is studying the required daily intake for young adults. She learns that young adults need a balanced diet to support growth. Which of the following is important for bone health? A Calcium B Iron C Vitamin C D Folic acid
30 Zara is conducting an experiment on the rate of reaction. She measures the time it takes for a reaction to complete. What is the unit of measurement for time in the SI system? A Second B Minute C Hour D Millisecond