1.1.1 Planning

• The experimental objective answers the question "What are we trying to achieve?"

  True
• What is the dependent variable in an experiment?

  The variable you measure
• The hypothesis in an experiment answers the question "What do we expect to happen?
• Match the variable with its definition:

  Independent Variable ↔️ The variable you change

  Dependent Variable ↔️ The variable you measure

  Control Variables ↔️ Factors kept constant
• When developing a safe procedure, identify potential hazards and incorporate appropriate safety measures
• What should you identify in safety considerations for an experimental procedure?

  Potential hazards
• Reusing or recycling materials is a way to improve efficiency in a procedure.

  True
• A digital sensor is a data collection tool
• Designing data collection methods and tools is crucial for generating meaningful data.

  True
• The hypothesis answers the question, "What do we expect to happen?"
• In an experiment to study the effect of fertilizer on plant growth, the hypothesis might be that a specific organic fertilizer will result in taller plants
• The independent variable is the variable you change or manipulate
• What is the purpose of control variables in an experiment?

  Ensure they do not affect dependent variable
• In a study comparing the effectiveness of different fertilizers on plant growth, what is the independent variable?

  Type of fertilizer
• What are some examples of apparatus used in experimental equipment?

  Beakers, test tubes, balances
• Identifying and gathering the appropriate equipment and materials is crucial for conducting an experiment successfully.

  True
• What does PPE stand for in the context of experimental safety?

  Personal Protective Equipment
• An efficient experimental procedure aims to minimize time, resources, and waste
• Visual monitoring and recording changes or events is an example of observation as a data collection method.


  True
• The data collection method that uses measuring instruments to quantify variables is called measurement
• Sampling involves collecting a portion of a larger substance or population for analysis.


  True
• Electronic devices that automatically measure and log data are called digital sensors
• Designing effective data collection methods and tools is crucial for generating reliable and meaningful experimental data.


  True
• Creating visual representations of data, such as line graphs, is a data analysis technique called graphing
• Steps in the data analysis process

  1️⃣ Collect data

  2️⃣ Graph or plot data

  3️⃣ Apply statistical analysis

  4️⃣ Compare results with hypothesis
• To minimize sampling errors, it is important to ensure representative sampling techniques
• Controlling environmental factors like temperature and humidity can reduce procedural errors.


  True
• What is the experimental objective in an experiment?

  The goal or purpose
• The hypothesis is an educated guess about the expected outcome of the experiment
• The independent variable is the variable you change or manipulate
• Control variables are kept constant to ensure they do not affect the dependent variable.


  True
• In an experiment to study fertilizer effects, the hypothesis might be that organic fertilizer results in taller plants.


  True
• What is the next step after understanding the experimental objective and identifying variables?

  List equipment and materials
• An efficient experimental procedure minimizes time, resources, and waste.


  True
• Procedural steps should be logical, clear, and easy to follow
• Steps for determining the concentration of an unknown acid solution

  1️⃣ Measure 25 mL of the unknown acid solution using a graduated cylinder

  2️⃣ Add 2-3 drops of phenolphthalein indicator

  3️⃣ Titrate with standardized sodium hydroxide until pink

  4️⃣ Record the volume of sodium hydroxide used

  5️⃣ Calculate the concentration of the acid
• What is the purpose of designing effective data collection methods and tools?

  Ensure reliable data
• Match the term with its description:

  Experimental Objective ↔️ The goal or purpose of the experiment

  Hypothesis ↔️ An educated guess about the outcome
• What is the independent variable in an experiment studying plant growth?

  Amount of water
• What are the three main types of variables in an experiment?

  Independent, dependent, control