3.2 Conducting Experiments

• What is the overall purpose or objective of an experiment called?

  The aim
• Why is identifying equipment and materials essential for an experiment?

  Effective execution
• What should a structured procedure for data collection include?

  Defined steps
• Why is it crucial to follow safety protocols during experiments?

  To protect the experimenter
• Example of data table columns for measuring resistance at different temperatures:

  1️⃣ Temperature (°C)

  2️⃣ Resistance (Ω)
• Use a data table or spreadsheet to neatly organize measurements and observations.
• Take multiple measurements at each data point and calculate the average to improve accuracy.
• Steps to ensure data collection is accurate and systematic

  1️⃣ Use a data table or spreadsheet

  2️⃣ Record data immediately

  3️⃣ Label all data points

  4️⃣ Take multiple measurements

  5️⃣ Round measurements appropriately

  6️⃣ Document unusual observations
• Understanding the aim and hypothesis helps guide the experimental design, data collection, and analysis.


  True
• Having a checklist of equipment and materials minimizes potential delays during the experiment.


  True
• Following safety protocols is crucial during an experiment to protect both the experimenter and the equipment.


  True
• What should be ensured about the work area to avoid tripping hazards?

  It is clean and organized
• What is the first strategy for recording data accurately in an experiment?

  Use a data table
• What should be included when labeling data points in an experiment?

  Variable, unit, information
• What relationship was observed between temperature and resistance in the copper wire experiment?

  Positive relationship
• In the temperature coefficient of resistance formula, ΔT represents the change in temperature
• The hypothesis is an educated guess about the expected outcome or relationship between the variables
• Creating a checklist of required items streamlines the experiment process and minimizes potential delays
• Steps to measure the relationship between resistance and temperature:

  1️⃣ Set up the equipment

  2️⃣ Record initial resistance

  3️⃣ Heat the wire

  4️⃣ Measure resistance at each temperature

  5️⃣ Repeat measurements and calculate the average
• Wearing appropriate personal protective equipment (PPE) is a common safety measure, such as goggles, gloves, and lab coats
• Documenting unusual observations or anomalies may impact the data's reliability


  True
• When should data be recorded during an experiment?

  Immediately as collected
• What should you round measurements to during data collection?

  Significant figures
• What is the overall purpose or objective of an experiment called?

  Aim
• Why is it essential to identify equipment and materials before starting an experiment?

  Ensures smooth operations
• Steps to develop a procedure for data collection

  1️⃣ Set up the equipment

  2️⃣ Record initial measurements

  3️⃣ Vary the experimental conditions

  4️⃣ Measure and record data

  5️⃣ Repeat measurements
• Wear appropriate personal protective equipment (PPE), such as goggles, gloves, and lab coats.
• Adhering to safety protocols helps mitigate risks and prevent accidents during an experiment.

  True
• When recording data, it is important to use a data table or spreadsheet
• To improve accuracy in data collection, multiple measurements should be taken at each point
• What should measurements be rounded to during data collection?

  Significant figures
• The formula for the temperature coefficient of resistance uses the change in resistance, initial resistance, and change in temperature.


  True
• What conclusion can be drawn if the calculated temperature coefficient confirms the expected positive relationship?

  Hypothesis is supported
• Understanding the aim and hypothesis helps ensure the experiment addresses the research question


  True
• Match the equipment with its purpose:

  Thermometer ↔️ Measures temperature

  Multimeter ↔️ Measures resistance

  Heater ↔️ Increases temperature

  Beaker ↔️ Holds water
• A clear procedure ensures consistent and accurate data collection

  True
• What is the primary purpose of using a data table or spreadsheet in an experiment?

  Organizing measurements
• Why is it crucial to record data accurately and systematically in an experiment?

  Ensures reliable results
• Data points should be labeled with the corresponding variable, unit, and other relevant information.


  True
• Document any unusual observations or anomalies that may impact the data.


  True