*Maths test* indices 1a) m-³ × m³ = b) 10-² ÷ 10⁴ = c) 3(a-²)³ = d)(4a²)² × 16 a² = [5 marks] 2. Indices a) (27/8) to the power( -⅔) b)(98/200) ^-½ [4) c) find x I) 2^x= 8 ii) x^-⅔ = 9 iii) 2x-¾ = 16. [8] Logarithms solve the following logarithms 3 a) log 1000 b) log 1/1000 c) log 32 base 2 d) log 1/4 base 8 e) 2 Log 3 base 9. [8] 4 a )Log 5 base 25 + log 5 base 25 b) Log 18 base 6 + log 2 base 6 c ) 2 log 10 + 3 log 10 d) Log 16 base 8 + log 1 e). 2Log 1 base 7 + 3 log 7 base 7 f). 4 log 2 base 8 - log 16 base 8 g). Log 1000 - log 100000 h). 3 log 2 base 16 - log 2 base 16 . [ 16] 5) It is given that Log 2 base 6= 1.7 Log 3 base 6= 1.2 Find , a) log 9 base 6 b) log 1/4 base 6 c ) log 6 base 6 d ) log 18 base 6 e ) Log 1,5. base 6 [10] *Geography test🖊️* 🖊️🖊️ Questions 1a) List any three components of the soil.[3] b) Describe and explain the importance of the soil to the ecosystem.[7] c 2a) Describe and explain the process of soil erosion.[4] b) What are the effects of soil erosion[4] c) You are an environment officer working in an area heavily affected by soil erosion. What measures would you put inplace to minimize the effects of soil erosion?[4] 3a) Outline the main components of a savannagrass land ecosystem.[5] 4a. how plants in Savannah ecosystem addapted for their functions (4) b) describe the climatic and vegetation characteristics of equatorial ecosystem. (7) 5 a. What is a wetland b) what are the benefits of wetland (7) c) how human interference has resulted into the destruction of wetlands (5) 6 a ), what are the causes of human wildlife conflict. b) what can be done to reduce human wildlife confict (4) 7 a) define climate change b) describe the causes of climate change (5) 8 a) define global warming d) describe the causes of global warming (7) e) Explain how global warming can be reduced (7) 9) explain how the adaptations of vegetation in Savannah ecosystem [5] b) Outline the economic activities likely to take place as a result of the characteristics you have outlined above.[4] c) How have human activities led to the destruction of the Equatorial ecosystem?[4] 10) Define Climate Change.[2] b) What problems are likely to be experienced by Zimbabwean farmers as a result of climate changes?[4] c) As a government official, what measures would you propose to address the problems mentioned in b) above?[4] 11): a) What are the causes of climate change ?[3] b) Describe the effects of drought in communities?[4] c) What measures can be done to reduce impact of drought?[5] *Combined Science 🖊️🖊️🖊️*💥💥💥 Biology section🔥🔥📚 1 a . Define specialised cells(2) b. Name any two examples of specialised cells(5) c . Describe the functions of red blood cells (2) d . Explain how root hair cells, is adapted fr it's function (2) e) Answer number 7 , zimsec question paper below. [4] 2 . Define ecosystem [2] b what do you understand by the terms abiotic and biotic components of ecosystem(4) c. Differentiate natural ecosystem from artificial ecosystem (6) d. Explain the nitrogen cycle (4) 3. a. Define Biodiversity (2) b). Describe the problems caused by limited bio - diversity ( 5) c. Outline the advantages of Biodiversity . Define photosynthesis (2) b) explain how leaf is adapted for photosynthesis (5) c) differentiate xylem from phloem (2) d) what is active uptake (1) e) describe four factors affecting the rate of photosynthesis (8) f) write the word equation for photosynthesis (2) g) state the uses of end product of photosynthesis (4) h) list the stages done in testing a leaf for starch (5) *Chemistry section🔥🔥📚* 1. Use the diagram of separation , which shows the method used to separate water and ethanol a)Name part A B D C E F b) name the method used (1) c). Define it (2 d). Which substance will evaporate first , explain why ? (3) e)Define separation (1) f). outline five methods of separation (5) 2. Define the terms Paper chromatography Stationary phase Solvent Solvent frontOR Mobile phase Chromatogram (6) b. Describe the uses of paper chromatography (5) 3 a. define an atom (1) an element(1) b. Draw the structure of a nitogen atom , labeling parts (6) c. For an atom symbol C ¹ name the atom ². atomic number ³. atomic mass ⁴. Electronic configuration. (4) d. For an atom whose number of electrons is 11 What is the ¹ atomic mass ² electronic configuratiovn ³ how many elfrontO found on the valency shell ⁴ give the nuclide notation for this atom (6) 4. What name is given to the elements of ¹ group 1 ² group 2 ³ group 7 ⁴ group 8. (4) 5) describe the physical properties of group 1 elements (5) 6. Describe the uses of halogelfront *Physics section* 📚🔥🔥 1. Define a)Physical quantities b) mass c) length d) temperature (5) 2. What is the SI unit of the following quantities a) length b) temperature c) amount of substance d) electric current. e) time f) mass 3. Outline four instruments tht can be used to measure length (4) 9a) state the Newton's second law of motion. b) define acceleration and velocity giving their base units(4) 10, What is the mass of an object moving from pushed by a force of 85N and it's acceleration is 2ms-² ?(3) 11 A car of mass 1.2tonnes accelerates from 5ms-¹ to 30ms-¹ in 2,5s. Calculate the average accelerating force on the car.(4) 4. Define force , weight , mass and linear momentum (4) 5. Example An astronaut and his space suit have a total mass of 90kg. What will be his (a)Weight on earth (b)Mass on moon (c)Weight on moon (5) 6. Outlet the differences between weight and mass (6) 7. A trolley has a mass of .32Kg. The trolley is moving at a constant (uniform) velocity of 2ms-¹ to the right. Calculate the momentum of the trolley. (3)