Magnetic needle Lamp. Name: Class:

Transcription

1 Magnetic needle Lamp Name: Class: 1

2 I. Complete the following: Final Revision Sheet 1 st prep. 1. Cm 3 -gm 2. Copper gold, nickel chrome 3. Rusting 4. Iron copper woodplastic 5. Mercury 6. Bromine 7. Molecules 8. Two 9. One 10. Sloth armadillo 11. Insectsarchanidsmyriapods 12. External shapeway of reproduction 13. Species 14. Euglen a-amoeba 15. Fernsgymnosperm 16. Copper 17. Insects-archanids 18. Work Na S Weight-height 23. Forcedisplacement 26. Electrickinetistrong 27. hardness 28. narrow- 31. eye-chest 32. monocotyledonedicotyedone 33. decreases -increases 36. insects-many 37. solid-liquid 38. good conductor bad conductor of electricity 20. Aluminiumgood conductor of heat. 24. Incisor 25. One -three s-one pair 29. equal 30. less 34. good and bas 39. mass - volume 41. mass-speed 42. electric kinetic Grease -rusting 46. Smell-taste II. Give reasons: 35. sodium chloridesodiumchlorine 40. liquid gas 45. Sodiumsliver 1- Because density of wood is less than density of water but density of lead is more than water. 2- Because it has low melting point. 3- Because steel is a good conductor of heat but wood is a bad conductor of heat. 4- Because salt molecules occupy the intermolecular spaces among water molecules. 5- Because alcohol molecules occupy the intermolecular spaces among water molecules. 6- Because iron has strong intermolecular force. 7- Because molecules are in continuous motion and carry the properties of matter. 8- Because number of positive protons is equal to the number of negative electrons. 9- Due to rule of 2n Because the atom will be unstable. 11- Because the outermost energy level is completely filled with electrons. 2

3 12- To capture the insects. 13- Because aluminum is a good conductor of heat but wood and plastic are bad conductors of heat. 14- Because the density of petrol is less that density of water,so it floats on the water surface. 15- Because the density of hydrogen and helium is less that the density of air. 16- Because copper is a good conductor of heat but wood is a bad conductor of heat. 17- To protect it from rusting. 18- Because when the molecules of water are heated their speed increases intermolecular spaces increase. 19- Because the molecule of helium consists of one atom while the molecule of hydrogen consists of two atoms. 20- Because electrons have a negligible mass relative to the protons and neutrons. 21- Because they don t pollute the environment. 22- Because potential energy is directly proportional with the height. 23- Because height doesn t change. 24- Because the height increases. 25- Because the speed decreases. 26- Because kinetic energy is directly proportional with the velocity. 27- Because the velocity is maximum. 28- Because the velocity is zero. 29- Because it reproduces by formation of seed inside cone not inside a pericarp. 30- Because they reproduce by formation of seeds inside a pericarp. 31- Because they have four pairs of jointed legs. III. What is meant by: refer to the booklet. IV. Write the scientific term: 1. Element 2. molecule 3. atom 4. Intermolecular spaces. 5. atomic number 6. mass number 7. electrons. 8. energy levels 9.Energy 1o.sound energy 11.electric energy. 12.potential energy 13.kinetic energy 14.mechanical energy 15.potential energy 16.height 17.weight 18.mass 19.velocity 20.heat. 21.temperature 22.conduction 23.convection 24.radiation 25.gm/cm 3 26.nickle -chrome 27.rubber 28.coal 29.inter gases 30.mercury 31.atomic number. 32.mass number. 33.neutrons 34.Helium 35.melting point 36.boiling point 37.evaporation 38.atom 39.compound 40.rodent 41.ferns 42.conservation law of energy 43.quantum 44.mass number 45.mechanical 46.microorganisms 47.snail 48.work done energy 49.water. 50.algae. 3

4 V. Complete the table : P.O.C Symbol Number of neutrons No. of electrons in outermost level Electronic configuration Active or inactive Sodium ,8,1 active Nitrogen 7 5 2,5 active Chlorine ,8,7 active Helium Inactive Lithium 4 1 2,1 active Neon ,8 Inactive Sulphur ,8,6 active Aluminum ,8,3 active Carbon 6 4 2,4 active VI. Choose a phrase from column A which may match another from column B: A B 1.The unit of density Atomic number (2) 2.The number of positive protons in the nucleus cm 3 (7) 3.Substances that conducts heat and electricity. Mass number (5) 4.The unit of mass Copper and iron (3) 5.The sum of the number of protons and neutrons g (4) 6.Bad conductors of heat and electricity. g/cm 3 (1) 7.The unit of volume Wood and plastic (6.) VII. Compare between the states of matter : P.O.C Solid Liquid gas Intermolecular force Very strong Weak Very weak Intermolecular distance tiny bigger than very large solids Intermolecular motion Limited intermediate Completely free Shape and volume Definite shape Definite volume Indefinite shape Definite volume Indefinite shape Indefinite volume An example Iron water oxygen Bean Dicotyledon seed Insects Have 3 pairs of jointed legs. (such as fly) wheat Monocotyledon seed Arachnids Have 4 pairs of jointed legs (such as Spider) 4

5 VIII. Solve the following problems 1. Potential energy = Weight x Height (Weight = Mass x Gravity acceleration) = 5 x 10 = 50 N kinetic energy=zero Potential energy = 50 X 8 =400 J 2. Potential energy = Weight x Height weight = potential energy / height =88 / 11 = 8 N 3. Kinetic energy = 1/2 x Mass x (Velocity) 2 46 = 1/2 X Mass x (4) 2 Mass = 5.75 kg 4. Volume= = 10cm3 Density= mass/volume=78/10=7.8gm/ cm 3 5. Mechanical energy=potential energy +kinetic energy = =1500 joule 6. Kinetic energy=1/2 mass x velocity 2 =1/2 x0.5 x 8 2 =16 joule 7. Work = force x displacement =20x 2=40 joule IX. What is the energy transformation in the following: Device or process Energy used Energy produced Solar cell Solar energy Electric energy Electric heater Electric energy Heat energy Electric lamp Electric energy Light energy Burning of fuel Chemical energy Heat energy Electric fan Electric energy Kinetic energy Battery Chemical energy Electric energy Burning of food in the living cell Chemical energy Heat energy Simple cell Chemical energy Electric energy 5

6 Model Answer text book Unit 2 :General Exercises page 63 Question 1: 1-c 2-c 3-b 4-b 5-a 6-c 7-d 8-b Question 2: A-The energy stored in the object due to the work done on it is 20 joule. B- C-The sum of potential energy and kinetic energy of an object is 100 joule. D-It is a form of energy that transfers from an object with higher temperature to an object has a lower temperature. Question 3: A. Because when the air is cooled its density increases, it moves down and hot air moves up to be cooled. B. Because when the air is heated its density decreases, it moves up and cold air moves down to be heated. C. Because Burning of the fuel gives energy for the car to move and burning of food gives the body energy. D. Because it doesn t pollute the environment. E. Because they are used in killing,wars and massive destruction. Question 4: Device Energy used Energy produced Electric lamp Electric energy Light energy Radio Electric energy Sound energy Mobile phone Electromagnetic energy Sound &light energy Electric fan Electric energy Kinetic energy Torch Chemical energy Light energy Question 5: a. Weight = Mass x Gravity acceleration= 5x10=50 Newton Potential energy = Weight x Height =50x8=400 joule Kinetic energy = zero b. Potential energy = Weight x Height=50x2=100joule Kinetic energy = Mechanical energy - potential energy = =300 joule c. Potential energy= zero Kinetic energy = 400 joule Question 6: Potential energy = Weight x Height Weight = Potential energy/ Height = 88/11= 8 Newton Question 7: Kinetic energy=1/2 mass x velocity 2 Mass= Kinetic energy/1/2 velocity 2 = 64/ 2x16= 8 kg 6

7 Unit 3:lesson 1: page 79& 80 Question 1: 1- Sloth and armadillo. 2- Insects-archanids-myriapods 3- External shape and way of reproduction. 4- Banana-Molukhyia. 5- Species. Question2: 1- Arachnids 2-vougheir 3-jelly fish 4-4 Question 3: 1-Spider 2-Armadillo 3-Pine 4-Octopus Question 4: 1- To capture the insects. 2-Because they are not from the same species. Question 5: Rabbit Two pairs of incisors in upper jaw and one pair in lower jaw. Bean Dicotyledon seed Pine Gymnosperm Squirrel one pairs of incisors in each jaw. wheat Monocotyledon seed Palm Angiosperm General exercises page 91 Question 1: 1-Euglena-amoba. 2-one-two 3-teethless-having teeth 4-ferns-pine Question 2: 1-cancelled 2-octopus 3-cancelled 4-dicotyledone 5-cancelled Question 3: Insects Arachnids Have 3 pairs of jointed legs. (such as fly) Have 4 pairs of jointed legs (such as Spider) Rodents Lagomorphs One pairs of incisors in each jaw, such as squirrel Two pairs of incisors in upper jaw and one pair in lower jaw, such as rabbit Bean wheat Dicotyledon seed Monocotyledon seed 7