Measuring Respiration  To know how to measure respiration

Respiration  Respiration takes place in the cells (it is not “breathing in and out”)  Respiration is the release of energy (from glucose) in our cells  Animals and plants respire  In the light plants respire, but produce the oxygen for this to occur by photosynthesis - the carbon dioxide they produce via respiration is used for photosynthesis  In the dark plants respire, producing carbon dioxide  Respiration takes place in the cells (it is not “breathing in and out”)  Respiration is the release of energy (from glucose) in our cells  Animals and plants respire  In the light plants respire, but produce the oxygen for this to occur by photosynthesis - the carbon dioxide they produce via respiration is used for photosynthesis  In the dark plants respire, producing carbon dioxide

Equation  Remember, in a reaction: reactants  products glucose + oxygen  carbon dioxide + water + (energy) C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O + (energy)  Respiration is the process of converting glucose to energy, occurring in every cell  Remember, in a reaction: reactants  products glucose + oxygen  carbon dioxide + water + (energy) C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O + (energy)  Respiration is the process of converting glucose to energy, occurring in every cell

Respiration Wordsearch Have a go at the following wordsearch: - Words to find: - Aerobic Anaerobic Carbohydrase Carbohydrate Carbon dioxide Energy Glucose Lactic acid Oxygen Respiration Water

Measuring Respiration  How could you measure the rate of respiration?  During respiration the gas carbon dioxide is produced - testing for this would show if respiration occurred, and at what rate (limewater goes cloudy)  Water is also produced - we could measure this (how much we exhale)  Energy is also released during respiration, being used by our cells - you could monitor the activity of the organism (the heat released), although this is not completely accurate!  How could you measure the rate of respiration?  During respiration the gas carbon dioxide is produced - testing for this would show if respiration occurred, and at what rate (limewater goes cloudy)  Water is also produced - we could measure this (how much we exhale)  Energy is also released during respiration, being used by our cells - you could monitor the activity of the organism (the heat released), although this is not completely accurate!

Experiment  You have a variety of experiments to carry out today, measuring the respiration rate at each  You will need to work in pairs / threes, moving from station to station  For each station you need to carry out the experiment, and write a brief summary in your book of the experiment, and what you found  E.g - station 1: measuring the temperature of people before and after exercise - after exercise a greater amount of respiration has taken place, and as a result the temperature changed (increased / decreased) because…  You have a variety of experiments to carry out today, measuring the respiration rate at each  You will need to work in pairs / threes, moving from station to station  For each station you need to carry out the experiment, and write a brief summary in your book of the experiment, and what you found  E.g - station 1: measuring the temperature of people before and after exercise - after exercise a greater amount of respiration has taken place, and as a result the temperature changed (increased / decreased) because…

Activity EVIDENCE respiration is happening Beans ‘germinating’ in water Plants in sunlight ‘Litter’ containing Woodlice in a beaker YOU exercising Yeast solution DRY Beans

Stations  Germinating and non-germinating seed temperatures  Meal worms moving temperature and the room temperature  Your temperature before and after exercise  Pond weed in hydrogencarbonate indicator (in light and dark) yellow / orange in presence of carbon dioxide red / purple with no carbon dioxide  Yeast with delivery tube to limewater  Germinating and non-germinating seed temperatures  Meal worms moving temperature and the room temperature  Your temperature before and after exercise  Pond weed in hydrogencarbonate indicator (in light and dark) yellow / orange in presence of carbon dioxide red / purple with no carbon dioxide  Yeast with delivery tube to limewater