18 Questions
Identify the dependent and independent variables in this research question: 'How does the height a ball is dropped affect the height it bounces to?'
Dependent variable: height the ball bounces to; Independent variable: height the ball is dropped
Suggest three control variables for this experiment.
Possible control variables: surface material, air pressure, temperature
Write a conclusion for the data, linking it to scientific theory.
The conclusion should explain how the height a ball is dropped affects the height it bounces to, possibly referencing concepts like potential energy and gravity.
List four sources of error for your bouncing ball experiment. Rank them in order of significance. State their effect on the dependent variable. Suggest a detailed improvement and the equipment to use for each.
Possible errors: air resistance, initial height variance, ball deformation, human reaction time. Air resistance affects accuracy of bounce height measurements. To improve, use a vacuum chamber to minimize air resistance, uniform balls, precise measuring equipment, and motion sensors for more accurate timing.
Identify the dependent and independent variables in this research question: 'How does the length of the wire affect the current passing through it?'
Dependent variable: current passing through the wire; Independent variable: length of the wire
Suggest three control variables for this experiment.
Possible control variables: wire material, wire thickness, temperature
Explain why the average current should not be to more than 2 decimal places.
Measuring current to more than 2 decimal places would imply a precision that may not be supported by the experiment setup and could introduce unnecessary inaccuracies.
Recognize the following pieces of equipment: Measuring cylinder, Boiling tube, Conical flask, Beaker, Clamp stand, Bunsen burner, Tripod, Heat Proof Mat.
List of laboratory equipment items.
Match the hazard symbols with their meanings: Toxic, Corrosive, Flammable, Irritant, Oxidising.
Toxic = Can cause harm or death if exposed Corrosive = Can cause damage to skin or materials on contact Flammable = Can catch fire easily Irritant = Causes mild irritation or inflammation on contact Oxidising = Supports combustion and poses fire risk
Identify the dependent and independent variables in this research question: 'How does the height a ball is dropped affect the height it bounces to?'
Dependent variable: height the ball bounces to; Independent variable: height the ball is dropped
Suggest three control variables for the bouncing ball experiment.
Possible answers include: height from which the ball is dropped, type of ball used, surface the ball bounces on
Write a conclusion for the bouncing ball experiment, linking it to scientific theory.
The height a ball is dropped impacts the height it bounces to. This is due to the conversion of potential energy into kinetic energy.
List four sources of error for the bouncing ball experiment, rank them in order of significance, and state their effect on the dependent variable.
Possible errors: air resistance, measurement errors, surface irregularities, damping effects. Ranking by significance: 1. Measurement errors 2. Air resistance 3. Surface irregularities 4. Damping effects Effect on dependent variable: They can lead to inaccurate readings affecting the observed height.
Identify the dependent and independent variables in this research question: 'How does the length of the wire affect the current passing through it?'
Dependent variable: current passing through the wire; Independent variable: length of the wire
Suggest three control variables for the wire length experiment, and state why and how they should be controlled.
Possible controls: wire material, wire thickness, temperature. They should be controlled to isolate the impact of wire length on current passing through it.
Explain why the average current in the wire experiment should not be more than 2 decimal places.
The precision of the measuring equipment and the consistency of the experiment do not warrant recording the average beyond 2 decimal places.
Explain what features make the table of wire length and current results good.
Features could include clear column headers, consistent units, organized data, and a calculated average for convenience.
Explain how you can tell that the graph from wire length and current results is inversely proportional.
The graph shows a downward trend as one variable (length of wire) increases, while the other variable (current passing through it) decreases.
Study Notes
Revision Document
- The document is to be used in conjunction with notes from the exercise book and any work on Google Classroom to create personal summary revision notes.
- The revision process involves revisiting, recalling, and applying knowledge and skills to all topics.
Investigation Skills
- Identify dependent and independent variables in a research question, e.g., "How does the height a ball is dropped affect the height it bounces to?"
- Suggest control variables for an experiment, e.g., identifying three control variables for the bouncing ball experiment.
- Draw a line graph of results, including error bars, and write a conclusion linking the data to scientific theory.
- Identify sources of error in an experiment, rank them in order of significance, state their effect on the dependent variable, and suggest improvements with equipment.
Safety In The Lab
- Identify safety hazards in the lab and recognize hazard symbols for: Toxic, Harmful, Irritant, Corrosive, Flammable, Oxidising, and Explosive.
- Work safely in the lab, light a Bunsen burner, and draw conclusions from observations.
- Recognize and name various pieces of lab equipment, including:
- Measuring cylinder
- Boiling tube
- Conical flask
- Beaker
- Clamp stand
- Bunsen burner
- Tripod
- Heat Proof Mat
Revision Document
- The document is to be used in conjunction with notes from the exercise book and any work on Google Classroom to create personal summary revision notes.
- The revision process involves revisiting, recalling, and applying knowledge and skills to all topics.
Investigation Skills
- Identify dependent and independent variables in a research question, e.g., "How does the height a ball is dropped affect the height it bounces to?"
- Suggest control variables for an experiment, e.g., identifying three control variables for the bouncing ball experiment.
- Draw a line graph of results, including error bars, and write a conclusion linking the data to scientific theory.
- Identify sources of error in an experiment, rank them in order of significance, state their effect on the dependent variable, and suggest improvements with equipment.
Safety In The Lab
- Identify safety hazards in the lab and recognize hazard symbols for: Toxic, Harmful, Irritant, Corrosive, Flammable, Oxidising, and Explosive.
- Work safely in the lab, light a Bunsen burner, and draw conclusions from observations.
- Recognize and name various pieces of lab equipment, including:
- Measuring cylinder
- Boiling tube
- Conical flask
- Beaker
- Clamp stand
- Bunsen burner
- Tripod
- Heat Proof Mat
Review and apply knowledge of scientific investigation skills, including identifying variables and controlling experiments. Create personal summary notes for effective revision.
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