Aerobic Respiration SQA Exercises. Aerobic Respiration – what you should know Respiration is the...
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![Page 1: Aerobic Respiration SQA Exercises. Aerobic Respiration – what you should know Respiration is the breakdown of f______ to release its e_______ Living cells.](https://reader035.fdocuments.us/reader035/viewer/2022062317/5a4d1acf7f8b9ab059970f35/html5/thumbnails/1.jpg)
Aerobic Respiration
SQA Exercises
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Aerobic Respiration – what you should know
• Respiration is the breakdown of f______ to release its e_______
• Living cells need energy for cell d_______, synthesis of e________ and g ________
• In a plant chloroplast, light energy is transformed into c_______ energy
• In an animal muscle cell c________ energy is changed into m__________ energy
• Cells need o_______ gas to release energy from food during aerobic respiration
oodnergy
ivisionnzymes rowth
hemicalhemical
ovementxygen
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• Equation of aerobic respiration
• G______ + o______ e______ + ____ + _____
• The c_______ d________ given off by cells during tissue respiration has come from f_____
lucose xygen nergy CO2 H2O
arbon ioxideood
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• H_____ energy may be released by cells during respiration
F___ and oils contain m_____ chemical energy per gram than carbohydrates or proteins
M__________ is a___ the reactions in a c___ or o_________.
E_____ from food is n______ for metabolism. Aerobic respiration is the o____ cell process that can make this energy
eat
ats ore
etabolism llell rganismnergy eeded
nly
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Glucose diffuses in
Oxygen diffuses in
CO2diffuses out
H2O diffuses out
Glucose CO2 + H2O + oxygen + energy
Aerobic Respiration
CELL
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Cell growth
Cell division Synthesis of enzymes
movement Maintaining body temperature
Fats chemical energy
carbohydratesC
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oxygen
aerobic
glucose oxygen carbon dioxide water
carbon dioxide
Heat
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sum total reactions
proteins
cell energy
food respiration
C
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Energy content
temperature water volume
wear goggles hot apparatustemperature
heat loss to air water not stirredcalorimeter
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Absorbs carbon dioxide
Liquid moves up towards the seeds because the seeds absorb oxygen
Same apparatus but with dead seeds
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Why is the flask upside down?
Describe the control experiment
Why is it a good idea to use disinfectant with the control experiment
So the thermometer measures the temperature of the peas
Same apparatus but with dead peas
Kills bacteria – no rise in temperature due to bacterial respiration
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Experiment 5 The Respirometer
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At side B the coloured water moves ___ the tube _________the germinating peas because the peas are using up _________ gas during
___________.
This causes a _________ in the air pressure (volume) inside tube allowing the level of the coloured water to r____.
up towards
oxygen aerobic respiration
decrease
ise
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Volume of waterDistance between burning food and test tube
Heat lost to air / escaping
Starting temperature of water
Complete burning of food
Incomplete burning Energy lost as light
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30 X 0.21 = 6.3
6.3
growth / cell division / synthesis / chemical reactions / movement
fat / oils
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Experiments - PresentationFor every experiment you need:
to know the input variable.
•The variable you change.
The outcome variable.
•The variable you measure.
•This goes along the x-axis.
•This goes along the y-axis.
x
y
input variableoutcom
e variable
•This is the top row or first column in a table.
• This is the bottom row or last column in a table.
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Temperature (°C) 10 20 30 40 50Bubbles (number/s) 1 5 7 5 0
Temperature (°C)
Bubbles (number/s)
10 20 30 40 50
1
0
2
8
3
7
6
4
5
A Bar Chart – separate bars
1. Draw the axes
2. Mark in the labels
3. Mark the x scale4. Mark the y scale
5. Draw the bars
6. If you have time shade in the bars
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Temperature (°C) 10 20 30 40 50Bubbles (number/s) 1 5 7 5 0
Temperature (°C)
Bubbles (number/s)
10 20 30 40 50
1
0
2
8
3
7
6
4
5
A Histogram – joined bars
1. Draw the axes
2. Mark in the labels
3. Mark the x scale4. Mark the y scale
5. Draw the bars
6. If you have time shade in the bars
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Temperature (°C) 10 20 30 40 50Bubbles (number/s) 1 5 7 5 0
Temperature (°C)
Bubbles (number/s)
1
0
2
8
3
7
6
4
5
A Line graph
10 20 30 40 500
1. Draw the axes
2. Mark in the labels
3. Mark the x scale4. Mark the y scale
5. Draw the points
6. Join the points with straight lines
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Averages
1. Find the total number of bubbles
Temperature (°C) 10 20 30 40 50Bubbles (number/s) 4 8 14 4 0
Try this example …
4 + 8 + 14 + 4 + 0 1. Find the total
= 302. Divide the total by the number of items
There are 5 items in the table30 5 = 6
Average = 6 bubbles/s3. Don’t forget units in your answer
To find the average number of bubbles …
Temperature (°C) 10 20 30 40 50Bubbles (number/s) 0 2 8 3 2
Answer =: 15 ÷ 5 = 3
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Percentages
1. Find the total number of bubbles
Temperature (°C) 10 20 30 40 50Bubbles (number/s) 4 8 16 4 0
What percentage of bubbles are produced at 30ºC?
4 + 8 + 16 + 4 + 0 1. Find the total
= 322. Divide the number of bubbles at 20ºC by the total number
8 32 = 0.25 this is the decimal fraction
0.25 x 100 = 25%
To find the percentage of bubbles at 20ºC …
3. Multiply the decimal fraction by 100 to get the percentage
25% of the bubbles are produced at 20ºC
0.5 x 100 = 50%
16 32 = 0.5 this is the decimal fraction
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Percentage increaseTemperature (°C) 10 20 30 40 50Bubbles (number/s) 4 8 12 4 2
What is the percentage decrease in bubbling at 40º C compared to 30ºC?
1. Find the increase in the number of bubbles at 30ºC
12 - 8 = 4
4 ÷ 8 = 0.5
To find the percentage increase in bubbling at 30ºC compared to 20º C…
2. Divide the increase by the original figure for 20ºC
0.5 x 100 = 50% increase
8 12 = 0.67 X 100 = 67%
3. Multiply by 100 to get percentage
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Ratios
10ºC : 20ºC4 bubbles : 8 bubbles
Temperature (°C) 10 20 30 40 50Bubbles (number/s) 4 8 14 4 2
1. Write down the ratio of the numbers
To find the simple whole number ratio of bubbles at 10 degrees compared to bubbles at 20 degrees …
2. Find a number that will divide into both numbers to give a whole number – in this case 2
4 bubbles 2 : 8 bubbles 2= 2 bubbles : 4 bubbles
3. Repeat step 2 until you cannot divide again without getting a fraction
2 bubbles 2 : 4 bubbles 2= 1 bubble : 2 bubbles
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Ratios
20ºC : 30ºC8 bubbles : 14 bubbles
Temperature (°C) 10 20 30 40 50Bubbles (number/s) 4 8 14 4 2
1. Write down the ratio of the numbers
To find the simple whole number ratio of bubbles at 20 degrees compared to bubbles at 30 degrees …
2. Find a number that will divide into both numbers to give a whole number – in this case 2
8 bubbles 2 : 14 bubbles 2= 4 bubbles : 7 bubbles
3. You cannot divide any more without getting a fraction so …
the simple whole number ratio is: 4 : 7
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Ratios
20ºC : 30ºC8 bubbles : 14 bubbles
Temperature (°C) 10 20 30 40 50Bubbles (number/s) 4 8 14 4 2
1. Write down the ratio of the numbers
To find the simple whole number ratio of bubbles at 20 degrees compared to bubbles at 30 degrees …
2. Find a number that will divide into both numbers to give a whole number – in this case 2
8 bubbles 2 : 14 bubbles 2= 4 bubbles : 7 bubbles
3. You cannot divide any more without getting a fraction so …
the simple whole number ratio is: 4 : 7