Btec Applied Science Unit 3 exam questions 2023 with complete solutions

What is a hypothesis? An Idea that you can test using practical experiments What are the Key features of a good hypothesis? A good Hypothesis must: Be able to be tested scientifically Relate one dependent variable to on independent variable What is a Null Hypothesis? States that there is no relationship or causality, for example, no relation between the temperature and the rate of reaction. What does qualitative data refer to? It refers to the appearance or value of something, such as the colour observed or whether the bubbles are produced. What does Quantitative data refer to? It refers to numerical measurements made, such as the volumes and times measured. What is SOP? The Standard Operating Procedure. This is an established procedure or method used to carry out a routine activity. It ensures consistent results every time. What are some examples of SOPs? Titration, Handling of chemicals, disposal of waste, qualitative analytical tests, preparing solutions What are risk assessments? It identifies hazards, evaluates the risks associated with those hazards and it determines ways to eliminate or control those risks. What is a Hazard? When the equipment or substance can cause harm, for example a hot plate or hydrochloric acid What is a risk? The harm that the hazard could cause and the chances of it happening, for example the risk of using a hot plate is getting burnt. What is the independent variable?