Exam-style questions. B1.4 Photosynthesis. Name... Class... Date...

Transcription

1 1 Which substance can a plant not take in from the soil or the air? A carbon dioxide B glucose C oxygen D water 2 What is the producer in this food chain? sycamore aphid ladybird swift A aphid B ladybird C swift D sycamore 3 Sunlight and chlorophyll are needed for photosynthesis. What other substances are needed for photosynthesis? A carbon dioxide and oxygen B carbon dioxide and water C glucose and oxygen D glucose and water 4 Which of these is a raw material for photosynthesis? A carbon dioxide B chlorophyll C glucose D sunlight This resource sheet may have been changed from the original. 1

2 5 Jim is a farmer who grows tomatoes. His tomatoes are grown indoors in a greenhouse. a One advantage of growing tomatoes indoors is that the temperature can be controlled. Suggest two other advantages of growing tomatoes indoors rather than outdoors. 1 2 b Jim controls the temperature where the tomatoes are grown using an oilfired heater. The oil-fired heater increases the temperature and gives off carbon dioxide. i Explain how this increases the speed at which the tomatoes grow. Two reasons are needed. ii Jim knows that if the temperature where the tomatoes are grown is too high, then the plants will die, even if they have enough water. Explain why the plants will die if the temperature is too high. This resource sheet may have been changed from the original. 2

3 c Jim finds the temperature that makes the tomatoes grow fastest. He maintains this temperature, then increases the carbon dioxide concentration. He sketches a graph of the effect on the plant growth (Figure 1). i ii Figure 1 Label with a letter C on Figure 1 the part where the carbon dioxide concentration is limiting. Draw on Figure 1 the line you would expect if Jim repeated this test at a higher light intensity. This resource sheet may have been changed from the original. 3

4 6 Plan an experiment to show how the rate of photosynthesis in a water plant like pondweed depends on light intensity. You may use the space for a labelled diagram to help your answer if you wish. (6 marks) This resource sheet may have been changed from the original. 4

5 7 Jaya studies photosynthesis in a plant. She measures the volume of gas that the plant takes in during photosynthesis. a Name the gas taken in during photosynthesis. b She finds that the plant takes in 300 cm 3 of gas in 24 hours. Calculate the average volume of gas taken in during 1 hour by the plant. c.. cm 3 The plant uses photosynthesis to make glucose. Some of the glucose is converted to other substances. Name one of these other substances and state what they are used for. substance use (4 marks) 8 a Write the balanced symbol equation for photosynthesis. (3 marks) This resource sheet may have been changed from the original. 5

6 b Draw straight lines to match each substance from photosynthesis to product or reactant. Substance from photosynthesis carbon dioxide glucose product oxygen reactant water b State where, exactly, in the cell photosynthesis occurs. c Photosynthesis is a reaction that takes in heat. Write down the name for the type of reaction that takes in heat. This resource sheet may have been changed from the original. 6