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GCSE OCR Combined Science A Papers 2 and 8
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#1. What is groundwater?
#2. What are the three domains?
#3. Which type of factor is air temperature?
#4. Why do plants need nitrogen?
#5. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?
#6. In mutualistic feeding relationships – which organisms benefit?
#7. Where does the water in lakes and rivers end up?
#8. What do we call animals that only eat plants?
#9. Which of the following is the source of coal?
#10. Which term do we use to describe the relationships between species that depend on each other for resources?
#11. By which process does water in the clouds move onto land?
#12. Which type of factor is soil composition?
#13. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)
#14. Which type of factor is pollution?
#15. What is potable water?
#16. Which type of factor is predation?
#17. In typical feeding relationships there are two elements – what are they?
#18. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats
#19. Which of these is a community?
#20. Which type of factor is competition?
#21. Which of these is a habitat?
#22. Which of the following are strategies organisms use to adapt to changing abiotic conditions?
Select all that apply:
#23. True or false – carbon dioxide is removed from the atmosphere as it dissolves in the oceans?
#24. What is a parasite?
#25. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?
#26. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?
#27. Sometimes it is not possible to measure the number of organisms in a transect, for example when measuring the distribution of plants. In this case we use an alternative measure called what?
#28. Nitrogen is often found in a particular form in the soil what is this form?
#29. How can we increase the accuracy of abundance estimates?
#30. Which are the two kinds of sampling we normally use?
Select all that apply:
#31. Which of these substances is sometimes added to water to make it potable?
#32. Which organisms maintain the nitrogen levels in the soil?
#33. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus
Select all that apply:
#34. Which of these processes allows saltwater to become potable?
#35. What are abiotic factors?
#36. In parasitic feeding relationships there are two elements – what are they?
#37. Which of these is a population?
#38. In some areas where there are poor soils (not enough nitrogen) carnivorous plants have adapted to get their nitrogen from which source?
#39. What does abundance measure?
#40. When fossil fuels are burned they release carbon into the atmosphere – which of the following are fossil fuels?
#41. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth
#42. Which of the following is the source of oil and gas?
#43. What is the correct order of groups in the Linnaean Classification system?
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#44. By which process does water in the oceans and lakes move into the atmosphere?
#45. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?
Select all that apply:
#46. Why do plants need oxygen?
#47. Which square instrument do we use for randomly sampling population sizes?
#48. By which process does water in the atmosphere become part of clouds?
#49. What are nitrogen-fixing bacteria?
#50. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.
#51. What are biotic factors?
#52. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.
#53. Which type of factor is disease?
#54. What do we call animals that are eaten by other animals?
#55. What natural source of nitrogen is sometimes added to fields by farmers?
#56. Why can humans only survive a few days without water?
#57. Predators are essential for healthy ecosystems – what happens if predators are removed due to extinction?
#58. Which of the following organisms belong to the kingdom – animals?
Select all that apply: