Unit 4CHAPTER 9: ATOMS AND MOLECULES Introduction of elements Laws of chemical combination Atoms, molecules and ions Writing chemical formulae Molecular massCHAPTER 10: STRUCTURE OF ATOM Atomic structure: Thomson's model, Rutherford’s model, Bohr's Model Fundamental subatomic particles Atomic number, Atomic mass, Mass number Isotopes, isobars & their application, relative abundance Electronic configurationCHAPTER 11: GRAVITATION Introduction Universal law of gravitation. Importance of the universal law of gravitation. Inverse square law. Gravitational force of Earth (Earth’s gravity). Motion under gravity (free fall) Mass and weight Variation in the value of 'g' Apparent weight and weightlessness Thrust and pressure Buoyancy Archimedes principle Relative densityUnit 5CHAPTER 12 DIVERSITY IN LIVING ORGANISMS Need of classification Basis of classification Classification and evolution The hierarchy of classification-the groups Five kingdom classification MoneraSyllabus Class 911 Protista Fungi Plantae Animalia Nomenclature Diversity in the range of hearing in humans and differentanimals What makes the sounds of different animals unique?CHAPTER-13 SOUND Waves and Sound Characteristics of wave Transverse and Longitudinal waves (mechanical waves examples) Production of sound Nature of sound as a wave Propagation through different media Speed of sound Factors affecting speed of sound Characteristics of sound wave Ultrasound and its application Reflection of sound Echo Reverberation Multiple reflection of sound SONAR Human EarUnit 6CHAPTER 14: OUR ENVIRONMENT Abiotic components of biosphere: Lithosphere (significance of soil) Atmosphere (role of atmosphere in climate control) Hydrosphere (significance of water for life) Our ecosystem- An introduction Cycling of nutrients: Nitrogen, Carbon, Oxygen (Biogeochemical cycles)CHAPTER 15: ENVIRONMENTAL PROBLEMS AND THEIR SOLUTIONS Air Pollution indicators: Organisms like lichens, Greenhouse effect, Ozone layerdepletion, Global warming/climate change Solutions: Smog tower, Green drive, NGT Water pollution indicators: EutrophicationSyllabus Class 912 Soil pollution indicators: Nature of soil (acidic and basic) affecting soil life Health hazards due to pollution (various diseases)CHAPTER 16: FOOD RESOURCES Farm crops Improvement in crop yield Hybridisation and high yield variety seeds GMOs Biofortification Farming techniques/ practices (organic farming, city farming Hi-tech farming-polyhouse, precision farming, hydroponics, Aeroponics) Crop production management Nutrient management Manures/fertilisers Irrigation Cropping pattern Crop protection and management Weeds Insects/pests Diseases Gardening at home (vegetable garden & medicinal plants) Animal husbandry Cattle farming/dairy farming Poultry farming Fish production Apiculture Sericulture Food industry/food technology Judiciously growing and consuming food to prevent self and society from deadlydisease

Unit 4CHAPTER 9: ATOMS AND MOLECULES Introduction of elements Laws of chemical combination Atoms, molecules and ions Writing chemical formulae Molecular massCHAPTER 10: STRUCTURE OF ATOM Atomic structure: Thomson's model, Rutherford’s model, Bohr's Model Fundamental subatomic particles Atomic number, Atomic mass, Mass number Isotopes, isobars & their application, relative abundance Electronic configurationCHAPTER 11: GRAVITATION Introduction Universal law of gravitation. Importance of the universal law of gravitation. Inverse square law. Gravitational force of Earth (Earth’s gravity). Motion under gravity (free fall) Mass and weight Variation in the value of 'g' Apparent weight and weightlessness Thrust and pressure Buoyancy Archimedes principle Relative densityUnit 5CHAPTER 12 DIVERSITY IN LIVING ORGANISMS Need of classification Basis of classification Classification and evolution The hierarchy of classification-the groups Five kingdom classification MoneraSyllabus Class 911 Protista Fungi Plantae Animalia Nomenclature Diversity in the range of hearing in humans and differentanimals What makes the sounds of different animals unique?CHAPTER-13 SOUND Waves and Sound Characteristics of wave Transverse and Longitudinal waves (mechanical waves examples) Production of sound Nature of sound as a wave Propagation through different media Speed of sound Factors affecting speed of sound Characteristics of sound wave Ultrasound and its application Reflection of sound Echo Reverberation Multiple reflection of sound SONAR Human EarUnit 6CHAPTER 14: OUR ENVIRONMENT Abiotic components of biosphere: Lithosphere (significance of soil) Atmosphere (role of atmosphere in climate control) Hydrosphere (significance of water for life) Our ecosystem- An introduction Cycling of nutrients: Nitrogen, Carbon, Oxygen (Biogeochemical cycles)CHAPTER 15: ENVIRONMENTAL PROBLEMS AND THEIR SOLUTIONS Air Pollution indicators: Organisms like lichens, Greenhouse effect, Ozone layerdepletion, Global warming/climate change Solutions: Smog tower, Green drive, NGT Water pollution indicators: EutrophicationSyllabus Class 912 Soil pollution indicators: Nature of soil (acidic and basic) affecting soil life Health hazards due to pollution (various diseases)CHAPTER 16: FOOD RESOURCES Farm crops Improvement in crop yield Hybridisation and high yield variety seeds GMOs Biofortification Farming techniques/ practices (organic farming, city farming Hi-tech farming-polyhouse, precision farming, hydroponics, Aeroponics) Crop production management Nutrient management Manures/fertilisers Irrigation Cropping pattern Crop protection and management Weeds Insects/pests Diseases Gardening at home (vegetable garden & medicinal plants) Animal husbandry Cattle farming/dairy farming Poultry farming Fish production Apiculture Sericulture Food industry/food technology Judiciously growing and consuming food to prevent self and society from deadlydisease

Define the mass number of an atom.

13.Based on Rutherford’s atomic model, which sub-atomic particle is presentin the nucleus of an atom?A. Proton onlyB. Proton and NeutronC. Neutron and ElectronD. Proton and Electron

Below is a square that represents one element of the periodic table.​​What information is in this square of the periodic table, from top to bottom?​​A average atomic mass, chemical symbol, chemical name, atomic number​​B atomic number, chemical symbol, chemical name, average atomic mass​​C average atomic mass, chemical symbol, chemical name, proton number​​D atomic number, chemical symbol, chemical name, proton number​​9 The diagram below is one model of an atom. By whom was this model of an atom proposed?​​Atom​​A Thomson​​B Dalton​​C Rutherford​​D Bohr​​10 What are the columns and the rows of the periodic table called?​​A periods and energy levels​​B groups and periods​​C atomic numbers and periods​​D groups and atomic numbers​​11 Which action can speed up the rate of a chemical reaction?​​A removing a catalyst​​B lowering the reactant concentration​​C lowering the temperature​​D breaking a reactant into smaller pieces

6. Describe the structure of an atom with a labeled diagram.