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3. 1. Name the process where green plants make their own food? Photosynthesis answer

4. 2. What is the food made by green plants during photosynthesis? Starch (the plant produces glucose and then stores this as starch) answer

5. 3.Name some foods which contain starch ? Pasta Bread Potatoes Rice answer

6. 4.Give the word equation for photosynthesis Carbon dioxide answer ++Water Sunlight -----> Starch (plants makes glucose - stored as starch) Oxygen

7. 5. Name the chemical test for starch? Iodine solution answer

8. 6. How can you tell if a green plant has been carrying out photosynthesis? It will contain STARCH in the leaves answer

9. 7. Give the colour change for an iodine solution test with starch? The iodine solution changes from brown to blue-black answer

10. 8.Which of the two plants will be able to make glucose (stored as starch) from photosynthesis? answer The plant in light

11. 9. Put these steps to test a leaf for starch in the correct order ? answer Rinse the leaf - to remove the excess alcohol Add iodine solution to test for starch Place the leaf in ethanol (alcohol) - to remove the green colour. Boil the leaf – this bursts the plant cells open. 1.Boil the leaf – this bursts the plant cells open.Boil the leaf – this bursts the plant cells open. 2.Place the leaf in ethanol (alcohol) – to remove the green colour.Place the leaf in ethanol (alcohol) – to remove the green colour. 3.Rinse the leaf - to remove the excess alcoholRinse the leaf - to remove the excess alcohol 4.Add iodine solution to test for starchAdd iodine solution to test for starch

12. 10.Why would these plants be kept in the dark prior to use in a photosynthesis experiment answer So that there is no starch in the leaves before carrying out the experiment

13. 11. Which plant can make its own food by photosynthesis. answer Water Carbon dioxide absorber Plant with carbon dioxide Plant with NO carbon dioxide The plant with carbon dioxide can make its own food by photosynthesis

14. answer 12. Which gas will be collected in the measuring cylinder? Why? Oxygen. Because the plant is carrying out photosynthesis Because the plant is carrying out photosynthesis

15. 13. What is the test for STARCH ? IODINE turns from BROWN to BLUE / BLACK answer

16. 14What is the test for oxygen? The oxygen will relight a glowing wooden taper answer

17. 15. What do you call the process in which a plant makes its own food using the energy from the sun? Photosynthesis answer

18. 16. Why should ethanol NOT be heated using a bunsen burner ? Ethanol is flammable and cannot be taken near the Bunsen burner. answer

19. 17. What is bicarbonate indicator used to test for ? carbon dioxide levels. answer

20. 18. Complete the table to show the correct bicarbonate indicator colours answer Carbon dioxide level in air Colour of bicarbonate indicator Low level Normal level High level Low level Purple Normal level Red High level Yellow

21. 19. What colour would bicarbonate indicator show for a water plant in light ? Purple (low level carbon dioxide) This is because the plants use up carbon dioxide answer

22. 20. What colour would bicarbonate indicator show for a water plant kept in the dark ? Yellow (high level of carbon dioxide) This is because the plants cannot photosynthesise answer

23. 21. What do plants provide us with ? Oxygen and food. answer

24. 22. How is photosynthesis affected as you move the plant closer to the light ? The more light the more it will photosynthesise. The closer the light is moved towards the beaker – the more bubbles of oxygen are produced. answer

25. 23. What can plant growers use to help plants grow successfully ? Plant growers can use chemicals to help plants grow successfully. answer

26. 24. What does a HERBICIDE do ? Herbicides kill unwanted plants (weed killers) answer

27. 25. What does a FUNGICIDE do ? Fungicides kill fungal infections answer

28. 26. What do INSECTICIDES do ? Insecticides kill insects that would eat the plants answer

29. 27. What do fertilisers contain ? Fertilisers contain chemical such as nitrogen that help the plants to grow. answer