HANDWRITTEN ANSWERS ONLY (NOTEXT)

HANDWRITTEN ANSWERS ONLY (NOTEXT)

HANDWRITTEN ANSERS ONLY (NOTEXT)

Part 1 Risk Assessment While planning for an investigation, it is important for the safety of the experimenter and of others that potential risks are considered. Therefore, before conducting any practical laboratory work you should conduct a risk assessment. The purpose of the risk assessment is to identify the risks and control them to keep everyone as safe as possible. To identify risks, think about the: - activity that will be carried out. - equipment or chemicals that will be used. A risk can have many different causes. Risks can be: Physics! Risk related to a factor within the environment that can harm the body withiwithout touching it. This may include ergonomic hazards. heat and cold. vibration hazards, and noise hazards. Chemical Risk- related to the exposure to chemicals in a substance. Read through page 4 detailing the practical investigation and consider the potential risks involved whilst conducting the practical. To help you with your risk assessment, think about the following List All Identify any risks State howr you will equipment you will be using Safely use each piece of equipment. chemicals you may be using Carefully use each chemical. Carefully dispose of the chemicals Risk assessment form (4 Marks} Complete the risk assessment form on page 3 for your practical investigation. Identify possible risks and think of ways you can reduce these risks to create a safe working experimental environment. For more information about risk assessment and practical investigations refer to Chapter 1 Working Scientifically; depth studies in your textbook, Risk Assessment Form Task or Scenario Details of Risk Likelihood of Safety Procedures to minimize Risk risk occurring Handle knife carefully. Try not to expose fingers while Cutting Plastic tubing Cuts on hands from knife - Be aware knife can slip off material while Medium cutting cutting. Cut with fingertip bent downwards to limit area exposed to knifeQuestioning and predicting 1. When thinking about the solar water heater as a whole system, what are the two main considerations to account for when designing the solar water heater? (2 Marks) 2. Using your text and secondary information sources. identify and briefly describe the factors which can affect thermal transfer of energyr due to: 3) Thermal conductivity {5 Marks) b) The emission and absorption of radiant energy (5 Marks)3. Based on the results of your investigation of secondary information from question 2. identify the variables which you can control that must be considered when developing your design. (5 Marks) Planning In the following pages sketch TWO possible designs for your hot water heater. Your sketches must include labels indicating the proposed circulation of water (if any) and indicate how the heating will be achieved. (6 Marks) Design 1 (3 Marks) Design 2 (3 Marks)Aim A couple of sentences describing the aim of your practical investigation. (1 Mark) Hypotheses (1 Mark) Materials List the materials (and quantities) used to construct your solar water heater. Include a photo of the materials before you began construction. (3 Marks) Method Provide a numbered list to Show the method used to construct your solar water heater. [2 Marks] Results Provide a photo of your solar heater the photo must include you holding a currently dated newspaper or magazine in the photo and be able to read the date. (2 Marks)