Btec Applied Science Unit 3
What is a hypothesis? - answerAn Idea that you can test using practical experiments
What are the Key features of a good hypothesis? - answerA good Hypothesis must:
Be able to be tested scientifically
Relate one dependent variable to on independent variable
What is a Null Hypothesis? - answerStates 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? - answerIt 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? - answerIt refers to numerical measurements
made, such as the volumes and times measured.
What is SOP? - answerThe 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? - answerTitration, Handling of chemicals, disposal
of waste, qualitative analytical tests, preparing solutions
What are risk assessments? - answerIt identifies hazards, evaluates the risks
associated with those hazards and it determines ways to eliminate or control those
risks.
What is a Hazard? - answerWhen the equipment or substance can cause harm, for
example a hot plate or hydrochloric acid
What is a risk? - answerThe 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? - answerThe variables you change during an
investigation.
What is the Dependent variable? - answerThe variables you are investigating and
measure during an investigation.
What is the control variable? - answerThe variables you keep constant during an
investigation.
, What should a method be? - answerA step-by-step set of instructions, Be logically
ordered, allows you to take sensible measurements, and allows you to test your
hypothesis.
When planning your method what do you need to make sure? - answerThat it will
procedure a range of results, reliable results, precise results, and accurate results.
What are some types of data? - answerThe data can be continuous such as the age of
plant ir number of plants. Some data can be a mixture of numbers and names such as
the number of different types of plants found in a garden.
What data is normally displayed on a bar chart? - answerContinuous data. You need to
make sure its a smooth curve of best fit, and that the curve goes through or near most
of the points.
What are bar charts used for? - answerThey are used for discrete data but can be used
to compare different sets of data.
What is the Pattern on the graph? - answerThe shape of the graph. It is the line that
goes up as time goes by but eventually levels off
What is the trend on a graph? - answerThe relationship between factors on the graph or
in the table. The full trend is that the volume increases as the time increases but then
levels off after a certain amount of time.
What is the sample size? - answerThe number of people sampled in the investigation.
To be confident in your conclusions you need a large sample size to give strong
evidence.
What is Primary data? - answerThis is the data that you have gathered for yourself
through the experiments or investigations .
What is secondary data? - answerThe data that you get in books, scientific papers or
the internet. You should compare your primary and secondary data to draw a
conclusion
How do you know if the data is anomalous? - answerIt doesn't fit into the pattern of the
other results. It does not lie close to the line of best fit.
What can cause the anomalous data? - answerNot following the method correctly.
inaccurate measuring/recording and impurities.
What is systemic error? - answerThe error that is built into the method or equipment
which you are using. This can be corrected by calibrating the balance. These errors are
quantitative.
What is a hypothesis? - answerAn Idea that you can test using practical experiments
What are the Key features of a good hypothesis? - answerA good Hypothesis must:
Be able to be tested scientifically
Relate one dependent variable to on independent variable
What is a Null Hypothesis? - answerStates 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? - answerIt 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? - answerIt refers to numerical measurements
made, such as the volumes and times measured.
What is SOP? - answerThe 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? - answerTitration, Handling of chemicals, disposal
of waste, qualitative analytical tests, preparing solutions
What are risk assessments? - answerIt identifies hazards, evaluates the risks
associated with those hazards and it determines ways to eliminate or control those
risks.
What is a Hazard? - answerWhen the equipment or substance can cause harm, for
example a hot plate or hydrochloric acid
What is a risk? - answerThe 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? - answerThe variables you change during an
investigation.
What is the Dependent variable? - answerThe variables you are investigating and
measure during an investigation.
What is the control variable? - answerThe variables you keep constant during an
investigation.
, What should a method be? - answerA step-by-step set of instructions, Be logically
ordered, allows you to take sensible measurements, and allows you to test your
hypothesis.
When planning your method what do you need to make sure? - answerThat it will
procedure a range of results, reliable results, precise results, and accurate results.
What are some types of data? - answerThe data can be continuous such as the age of
plant ir number of plants. Some data can be a mixture of numbers and names such as
the number of different types of plants found in a garden.
What data is normally displayed on a bar chart? - answerContinuous data. You need to
make sure its a smooth curve of best fit, and that the curve goes through or near most
of the points.
What are bar charts used for? - answerThey are used for discrete data but can be used
to compare different sets of data.
What is the Pattern on the graph? - answerThe shape of the graph. It is the line that
goes up as time goes by but eventually levels off
What is the trend on a graph? - answerThe relationship between factors on the graph or
in the table. The full trend is that the volume increases as the time increases but then
levels off after a certain amount of time.
What is the sample size? - answerThe number of people sampled in the investigation.
To be confident in your conclusions you need a large sample size to give strong
evidence.
What is Primary data? - answerThis is the data that you have gathered for yourself
through the experiments or investigations .
What is secondary data? - answerThe data that you get in books, scientific papers or
the internet. You should compare your primary and secondary data to draw a
conclusion
How do you know if the data is anomalous? - answerIt doesn't fit into the pattern of the
other results. It does not lie close to the line of best fit.
What can cause the anomalous data? - answerNot following the method correctly.
inaccurate measuring/recording and impurities.
What is systemic error? - answerThe error that is built into the method or equipment
which you are using. This can be corrected by calibrating the balance. These errors are
quantitative.
