1) Making food from sunlight a) Rate b) Elodea c) Glucose d) Photosynthesis 2) Gas needed for photosynthesis a) oxygen b) carbon dioxide c) nitrogen d) carbon monoxide 3) Needed for photosynthesis; obtained from the soil a) nitrates b) water c) mud d) potassium 4) Green subsance in leaves which traps the Sun's energy a) Pallisade b) Chloroplast c) Chlorophyll d) Chlorine 5) The source of energy for photosynthesis a) Glucose b) Soil c) Sun d) Water 6) Sugar made during photosynthesis a) Fructose b) Glucose c) Sucrose d) Icing sugar 7) Gaseous waste product of photosynthesis a) Nitrogen b) Methane c) Carbon dioxide d) Oxygen 8) Part of a plant where photosynthesis takes place a) Root b) Xylem c) Leaf d) Flower 9) Pondweed used in experiments to measure the rate of photosynthesis a) Duckweed b) Oh Dear c) Hello Dear d) Elodea 10) Describes the speed at which a chemical reaction goes a) Rate b) Velocity c) Pace d) Tempo 11) Factor most affecting the rate of photosynthesis a) Day of the week b) Temperature c) Wind speed d) Humidity 12) Factor NOT affecting the rate of photosynthesis a) Light intensity (brightness) b) Colour of light c) Time of illumination d) Noise level 13) What is a control variable? a) variable you keep the same b) variable you change c) variable you measure 14) What is an independent variable? a) variable you measure b) variable you keep the same c) variable you change 15) What is a hypothesis? a) variable you measure b) relationship you are investigating c) question you want to ask

photosynthesis & variables

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