BTEC APPLIED SCIENCE UNIT 3 ACTUAL
CORRECT ANSWERS.
What is a hypothesis? - CorreCt Answers -An Idea that you can test using
practical experiments
What does random sampling mean? - CorreCt Answers -It means that each
potential sample has the same probability of being selected.
When is random sampling used? - CorreCt Answers -When the area under
the study is large. When it is fairly uniform and when there is limited time.
What can piolet study's do? - CorreCt Answers -They can help you work out
your sampling size.
What is the minimum sample size? - CorreCt Answers -The minimum
sample size is the number of samples at which the number of different
species found starts to level off
What Abiotic factors can affect plant population? - CorreCt Answers -The
soil type/ moisture/ pH. Topography, for example steepness of slopes.
Temperature.
What is a quadrat? - CorreCt Answers -A quadrat is a small area of habitat,
which sometimes has a grid within it. The frame is placed in the ground and
the plants and animals inside are counted.
What is a point frame? - CorreCt Answers -It contains a number of pins.
,What is a line transects? - CorreCt Answers -Sampling lines are set up
across the area to be sampled. Species can be recorded along the whole
length of the line, this is continuous sampling. Or when species can be
recorded at set intervals along the line, this is systemic sampling.
What is a belt transcet? - CorreCt Answers -It is similar to a line transect
but it gives information on the abundance of species. Quadrats are placed at
set intervals along the line and numbers of each species are counted within
them
What do you need to consider when investigating fuels? - CorreCt Answers
-How much energy they produce, What pollutants they produce and how a
fuel is chosen for specific purposes.
What is the reaction for combustion of fuels? - CorreCt Answers -It is
exothermic, therefore energy is releases as heat.
What is the word equation for combustion? - CorreCt Answers -Fuel +
Oxygen -> Carbon dioxide + Water
(+ heat energy)
What is flammability? - CorreCt Answers -It is one of the most useful
properties of fuels as itshow easily they catch fire. This can be a hazard and
should be treated like it.
What is toxicity? - CorreCt Answers -Fuels can carry impurities that are
toxic.
, What are the Key features of a good hypothesis? - CorreCt Answers -A good
Hypothesis must:
Be able to be tested scientifically
Relate one dependent variable to on independent variable
What is a Null Hypothesis? - CorreCt Answers -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? - CorreCt Answers -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? - CorreCt Answers -It refers to
numerical measurements made, such as the volumes and times measured.
What is SOP? - CorreCt Answers -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? - CorreCt Answers -Titration, Handling
of chemicals, disposal of waste, qualitative analytical tests, preparing
solutions
What are risk assessments? - CorreCt Answers -It identifies hazards,
evaluates the risks associated with those hazards and it determines ways to
eliminate or control those risks.
CORRECT ANSWERS.
What is a hypothesis? - CorreCt Answers -An Idea that you can test using
practical experiments
What does random sampling mean? - CorreCt Answers -It means that each
potential sample has the same probability of being selected.
When is random sampling used? - CorreCt Answers -When the area under
the study is large. When it is fairly uniform and when there is limited time.
What can piolet study's do? - CorreCt Answers -They can help you work out
your sampling size.
What is the minimum sample size? - CorreCt Answers -The minimum
sample size is the number of samples at which the number of different
species found starts to level off
What Abiotic factors can affect plant population? - CorreCt Answers -The
soil type/ moisture/ pH. Topography, for example steepness of slopes.
Temperature.
What is a quadrat? - CorreCt Answers -A quadrat is a small area of habitat,
which sometimes has a grid within it. The frame is placed in the ground and
the plants and animals inside are counted.
What is a point frame? - CorreCt Answers -It contains a number of pins.
,What is a line transects? - CorreCt Answers -Sampling lines are set up
across the area to be sampled. Species can be recorded along the whole
length of the line, this is continuous sampling. Or when species can be
recorded at set intervals along the line, this is systemic sampling.
What is a belt transcet? - CorreCt Answers -It is similar to a line transect
but it gives information on the abundance of species. Quadrats are placed at
set intervals along the line and numbers of each species are counted within
them
What do you need to consider when investigating fuels? - CorreCt Answers
-How much energy they produce, What pollutants they produce and how a
fuel is chosen for specific purposes.
What is the reaction for combustion of fuels? - CorreCt Answers -It is
exothermic, therefore energy is releases as heat.
What is the word equation for combustion? - CorreCt Answers -Fuel +
Oxygen -> Carbon dioxide + Water
(+ heat energy)
What is flammability? - CorreCt Answers -It is one of the most useful
properties of fuels as itshow easily they catch fire. This can be a hazard and
should be treated like it.
What is toxicity? - CorreCt Answers -Fuels can carry impurities that are
toxic.
, What are the Key features of a good hypothesis? - CorreCt Answers -A good
Hypothesis must:
Be able to be tested scientifically
Relate one dependent variable to on independent variable
What is a Null Hypothesis? - CorreCt Answers -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? - CorreCt Answers -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? - CorreCt Answers -It refers to
numerical measurements made, such as the volumes and times measured.
What is SOP? - CorreCt Answers -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? - CorreCt Answers -Titration, Handling
of chemicals, disposal of waste, qualitative analytical tests, preparing
solutions
What are risk assessments? - CorreCt Answers -It identifies hazards,
evaluates the risks associated with those hazards and it determines ways to
eliminate or control those risks.
