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School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ Section: Interactions in Communities In the space provided, write the letter of the description that best matches each term. _____ 1. predation _____ 2. commensalism _____ 3. mutualism _____ 4. symbiosis _____ 5. parasitism _____ 6. herbivory _____ 7. host _____ 8. prey a. a relationship in which both species benefit b. one organisms feeds and lives on another specific organism c. an organism that provides food and a place to live for a parasite d. one organisms kills another for food e. the act of eating plants f. an organism that is hunted and eaten by a predator g. a relationship in which two species live in a close association with each other h. a relationship in which one species is helped and the other is neither harmed nor helped Complete each statement by writing the correct term in the space provided. 9. The relationship between dogs and fleas is an example of ______________________. 10. Orchids growing on the trunks of trees are an example of ______________________. Complete each statement by underlining the correct term in the brackets. 11. In the relationship between lions and zebras, the lion is the [predator / prey]. 12. In a parasite-host relationship, the host is usually [harmed / killed]. 13. The relationship between eels and cleaner fish is an example of [mutualism / commensalism]. 14.Resources that can be replaced at the same rate at which they are consumed are considered [renewable / nonrenewable]. 15. Resources that form much more slowly than they are consumed are considered [renewable / nonrenewable]. School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ Complete each statement by writing the correct term or phrase in the space provided. 16. Organisms need nitrogen to build ______________________. 17. Nitrogen-fixing bacteria use ______________________ to split molecules of nitrogen gas and combine the nitrogen atoms with hydrogen. In the space provided, write the letter of the description that best matches the term or phrase. _____ 18. wind energy a. nonrenewable resource _____ 19. solar energy b. renewable resource _____ 20. oil _____ 21. natural gas _____ 22. trees _____ 23. coal _____ 24. minerals In the space provided, write the letter of the phrase that best completes the statement. _____ 25. Trees are considered renewable because they a. are being cut down faster than they can grow. b. can never be used up. c. can be replaced as quickly as they are used. d. grow more slowly than they are used. _____ 26. Fossil fuels are considered nonrenewable because they a. are derived from organisms that were once alive. b. can never be used up. c. can be replaced as quickly as they are used. d. take millions of years to form. _____ 27. All of the following are examples of materials that cycle in ecosystems except a. energy. b. oxygen. c. water. d. nitrogen. School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ _____ 28. Which is one way in which carbon dioxide enters the atmosphere? a. percolation b. photosynthesis c. combustion d. evaporation _____ 29. Bacteria return nitrogen to the soil by which process? a. denitrification b. assimilation c. nitrification d. ammonification 30. The figure below shows the water cycle. Insert the following terms in the correct spaces: evaporation, groundwater, precipitation, transpiration, and water vapor. In the space provided, write the letter of the term that best completes the statement. _____ 31. Water retained beneath Earth’s surface is called a. precipitation. b. transpiration. c. condensation. d. groundwater. Read each statement, and write your response in the space provided. 32. Explain how an animal can be both predator and prey. _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ 33. List three ways carbon atoms return to the nonliving part of the carbon cycle. _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 34. What is the source of the energy that drives the water cycle? ___________________________________________________________________ 35. Which statement best describes why a model is useful when studying plate movement? Plate movement is difficult to observe in nature. Plate movement can be viewed only from space. Plate movement occurs only in remote areas of the world. Plate movement happens too quickly to understand its effects. 36. Earth is made up of many layers. Which layer is responsible for the movement of Earth’s plates? the core b) the crust c) Mantle d) the oceans 37. Look at the image below. The arrow points to the Atlantic Ocean as it was millions of years ago. Which statement best describes what is happening to the Atlantic Ocean as the plates drift farther apart? It is growing deeper. It is becoming wider. Its water is becoming saltier. Its temperature is decreasing. 38. Joshua spends the day at the beach with his family. He finds some smooth stones in the sand. What process causes such stones to become smooth? deposition b) erosion c) grooving 39. Notice the ice splitting the rock. To which process does the ice contribute? deposition b) erosion c) polishing d) weathering d) weathering School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ 40. Earth consists of the crust, the mantle, the outer core, and the inner core. Which label do scientists use when they refer to the four parts of Earth shown in the image? faults b) layers c) plates d) rings 41. Different types of plate motion produce boundaries that shape different landforms and cause different natural events. Which event will most likely occur where two plates move in different directions and slide against each other? an earthquake b) fault c) flood d) volcano 42. Which is the inner most layer of the earth? a) Core b) Mantle c) Crust 43. Which layer of the earth include both land, where you live and the water? a)Core b) Mantle c) Crust 44. What is the layer above the outer core? a) Core b) Mantle c) Crust 45. Identify the thinnest layer of the earth? b) Core b) Mantle c) Crust 46. Identify the hottest layer of the earth? a) Core b) Mantle c) Crust 47. A process of removal or transportation of material by water or soil a)Weathering b) Erosion c) Deposition 48. Dropping or settling of eroded material a)Weathering b) Erosion c) Deposition School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ 49. Huge sheets of ice to form and stay frozen year around a) Glaciers b) Rivers c) erosion 50. A technique for careful use of natural resources [conservation/restoration]. 51. A chocolate box is used as a jewelry box[reusing /restoration]. 52. The process of recovering useful materials from waste is [recycling/reduction]. Examples of parasitism: Tape worm (parasite) lives in digestive system of animals( host) Fleas live on dogs Examples of Mutualism Bees and flowers Large fish( eel) and cleaner fish Commensalism Orchids growing on a tree trunk Shark and Remora School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Answer Key 1. d 2. h 3. a 4. g 5. b 6. e 7. c 8. f 9. parasitism 10. commensalism 11. predator 12. harmed 13. mutualism 14. renewable 15. non renewable 16. 17. 18. b 19. b 20. a 21. a 22. b 23. a 24. a Date:___________ School of Modern Skills Dubai Name: _____________________ Revision Sheet Grade 6 Date:___________ 25. c 26. d 27. a 28. c 29. a 30. 6. water vapor 7. transpiration 8. evaporation 31. d 32. 33. cellular respiration, 34. sun 35. a 36. c 37. b 38. d 39. d 40. b 41. a 42. a 43. c 44. b 45. c 46, a 47. b 48. c 49. a 50. conservation 51. Reusing 52. Recycling decomposition combustion 9. ground water 10. precipitation