# Science (S 904) - Grade 9

Unit Area Covered Marks
Unit 1 Kinematics 05 Read more
Unit 2 Force and Motion 05 Read more
Unit 3 Gravitation 05 Read more
Unit 4 Floating bodies 05 Read more
Unit 6 Materials 05 Read more
Unit 7 Elements 05 Read more
Unit 8 The Fundamental Unit of Life 05 Read more
Unit 9 Cell Division 05 Read more
Unit 10 Tissues 05 Read more
Unit 11 Diversity in Living Organisms 05 Read more
Unit 12 Sound 05 Read more
Unit 13 Work, Energy and Power 05 Read more
Unit 14 Thermal Physics 05 Read more
Unit 15 Mixtures 05 Read more
Unit 16 Chemical calculations 05 Read more
Unit 17 Why do we fall ill 05 Read more
Unit 18 Biogeochemical Cycles 05 Read more
Unit 19 Human influences on Environment and repair 05 Read more
Unit 20 Improvement of food resources 05 Read more
Total Marks 100

# Unit 1

Kinematics

• Comprehend the concept of Rest and Motion.
• Differentiate between uniform and Non-uniform motion.
• Define the term speed, velocity and acceleration and write their SI Units.
• Represent different types of motion graphically.
• Draw and interpret displacement –time, velocitytime, distance-time graph for uniform and non-uniform motion.
• Derive equations of motion by graphical method.
• Comprehend uniform circular motion.
• Solve simple problems based on related concepts.
• Explore differ kinds of motion in everyday situations.

# Unit 2

Force and Motion

• Define the term Force and identify different types of forces in nature.
• Use vector addition to explain balanced and unbalanced forces.
• State and explain Newton's three laws of motion.
• Apply Newton's laws of motion to understand daily life observations.
• Express Newton's second law of motion in Mathematical form.
• Solve simple problems based on laws of motion.
• Define the terms inertia, momentum and write their SI units.
• State and explain principle of conservation of momentum.
• Apply momentum conservation principle to explain different situations.
• Explain in elementary terms – the concept of Collisions.
• Carry out simple experiments and investigations related to Force and Newton's laws of motion.

# Unit 3

Gravitation

• State and explain universal law of Gravitation.
• Express Newton's law of gravitation in Mathematical form.
• Define and explain Gravitational field strength.
• Use equations of motion in a gravitational field.
• Define and explain escape velocity and orbital velocity.
• Comprehend Elementary concepts related to satellite launch.

# Unit 4

Floating bodies

• Explain the meaning of the terms thrust and pressure.
• Define the terms density and relative Density.
• Recognise different forces acting on a floating object.
• Explain the concept of Buoyant force.
• Identify the factors affecting Buoyant force.
• State and explain Archimedes' Principle.
• Solve simple problems based on Archimedes' principle.
• Calculate Buoyant force when values for the density of a liquid and the volume of an object are given.
• Demonstrate the concept of Buoyant force.
• Apply the concept of Buoyant force to everyday life situations.

# Unit 5

• Differentiate between three states of matter.
• Investigate the interconversion of states of matter.
• Comprehend key points of Kinetic particle theory.
• Draw and analyse heating curves.
• Interpret the cooling curve and understand that it is reverse of heating curve.
• Recognise the cooling effect of evaporation.
• Recognize the factors that affect the rate of evaporation.
• Apply understanding of evaporation process in day-to-day life.
• Study the process of Diffusion.
• Investigate on the factors affecting the rate of diffusion.

# Unit 6

Materials

• Classify materials on the basis of physical properties like shape, size, texture, state etc.
• Categorize the materials as good or poor conductors of heat.
• Compare three different modes of transfer of heat i.e. conduction, convection and radiation.
• Investigate the characteristics of clothing material w.r.t. color and origin.
• Recognise the insulating properties of materials.

# Unit 7

Elements

• Comprehend the structure of an atom.
• Illustrate the arrangement of electrons in atoms.
• Apply electron arrangement in atoms to justify the placement of an element in periodic table.
• Define the terms isotopes and isobars.
• Categorize the elements as Isotopes and isobars.

# Unit 8

The Fundamental Unit of Life

• Recall that living organisms are made up of cells.
• Recognise the parts of a compound microscope and appreciate its use.
• Prepare and observe the slide of onion peel.
• Compare organisms on the basis of cell shape and size.
• Differentiate between unicellular and multicellular organisms.
• Relate the structure with the function of cell organelles.
• Investigate and illustrate the structure of plasma membrane, cell wall and relate it to their role in the cell.
• Explain the structure of plasma membrane and interpret its role as selectively permeable membrane.
• Infer that plasma membrane is a living membrane while cell wall is a non-living structure.
• Carry out experiments/activities to describe and define the processes: diffusion, osmosis, and plasmolysis.
• Interpret that cell is the structural and functional unit of the organism.
• Differentiate between prokaryotic and eukaryotic cells.
• Illustrate and distinguish between plant and animal cell.
• Explain cell theory.

# Unit 9

Cell Division

• Appreciate the significance of cell division.
• Outline the various stages of a typical cell cycle.
• Describe how a cell prepares itself to undergo division.
• Illustrate and identify the distinguishing features of Prophase, metaphase, anaphase and telophase.
• Define the term mitosis and infer that mitosis is an equational division.
• List the specific locations in a plant and animal cell where mitosis takes place.

# Unit 10

Tissues

• Recall the concept of 'Division of Labour'.
• Identify a group of cells of a specific location which are similar in structure and function and define the term 'tissue'.
• Distinguish between the types of tissues present in plants and animals.
• Compare the complexity of cell and tissue structure in plants and animals.
• Illustrate and describe the characteristic features of meristematic, simple permanent and complex permanent tissues.
• Elaborate the characteristic features of animal tissues.
• Categorise plant and animal tissues based on their structure, location and function.

# Unit 11

Diversity in Living Organisms

• Recognise the need to classify organisms.
• Recall that organisms can be grouped on the basis of similarities and dissimilarities.
• Relate the classification of life forms with their evolution.
• Make connections between the 'primitive with 'simple' and 'advanced' with 'complex' organisms.
• Appreciate the significance of giving scientific names to living organisms.
• Name and describe the distinguishing features of five kingdoms as proposed by Robert Whittaker.
• Arrange groups of classification in their hierarchal order.
• Draw out the salient features of various groups of Plant kingdom and Animal kingdom.
• Identify an organism on the basis of its specific features and give its scientific classification.
• Match the name of the organism to the group it belongs to.

# Unit 12

Sound

• Explain how sound is generated, how it travels and how is it detected, perceived or heard.
• Describe the Structure and function of the human ear.
• Distinguish between audible sound and ultra sound waves.
• Explain the phenomenon of echo and meaning of SONAR.
• Describe the reason for different speed of sound in different media and the practical applications of this difference.
• Define the terms frequency, wavelength and speed for sound. Establish the relationship between the three.
• Solve problems based on the relation between velocity, wavelength and frequency of a wave.
• Explain the concept of wave motion.
• Differentiate between transverse and longitudinal waves. Cite examples of two types.
• Distinguish between sound and noise.
• Define the terms 'pitch', 'loudness' and 'quality' of sound.
• Relate 'pitch' of sound with its frequency. How does this knowledge help in effective speech skills and communication?
• Relate 'loudness' of a sound to its amplitude and intensity.
• Distinguish between the terms quality, melody and shrillness of sound. State the factors on which these depend.

# Unit 13

Work, Energy and Power

• Define and explain the terms Work, Energy and Power.
• List different types of energy.
• Explain Energy transformations and the Law of Conservation of mechanical Energy.
• Describe various Sources of energy as renewable and non renewable.
• Describe different uses of Solar, wind, geothermal and nuclear energy. Know their relative advantages as well as limitations.
• Demonstrate the use of different forms of energy.
• Solve simple problems based on related mathematical results.

# Unit 14

Thermal Physics

• Explain expansion of solids, liquids and gases.
• Comprehend basic idea of Specific heat capacity and latent heat.
• Describe different modes of transfer of Thermal energy – Conduction, Convection and Radiation.
• Identify efficient and economical ways to improve insulation and Energy conservation in households and offices.

# Unit 15

Mixtures

• Differentiate between Homogenous and heterogeneous mixtures.
• Discriminate between colloids and suspensions.
• Comprehend the differences between a mixture and a compound.
• Recognize the techniques to separate mixtures.
• Identify and appreciate the criteria for purity of substances.

# Unit 16

Chemical calculations

• Comprehend the terms relative atomic mass and relative molecular mass.
• Recognize the term Avogadro's constant.
• Comprehend the term Mole and apply the concept of mole to a given situation.
• Define the term Limiting reagent.
• Compute and estimate the excess reagent through the balanced chemical equation.
• Calculate % yield in a given situation related to a chemical calculation.

# Unit 17

Why do we fall ill

• Explain the significance of 'being healthy' and Realise that 'being in good health' is different from 'mere absence of disease'.
• Understand and define the term 'disease'.
• Investigate means of spread of infectious agents that cause diseases.
• Differentiate between Acute and chronic diseases; infectious and non-infectious causes of diseases.
• Analyse why every person does not catch infection even when he/she is living in the same locality/home.
• Define the term immunity and categorise the internal and external factors that affect immunity.
• Explain tissue-specific and organ-specific manifestation of microbes and relate it to the signs and symptoms of the diseases.
• Distinguish between the principles of treatment and prevention.
• Realise that immunisation at specific time periods and time intervals is essential for prevention of various diseases.
• Appreciate the fact that society health is as important as individual health.

# Unit 18

Biogeochemical Cycles

• Realise the interdependence of biotic and abiotic components of the biosphere.
• Explain the processes that are involved in the biogeochemical cycles (water, carbon, nitrogen and oxygen) in nature.
• Define the terms: ammonification, nitrification, denitrification.
• Investigate how human interference causes disturbances in the biogeochemical cycles.

# Unit 19

Human influences on Environment and repair

• Comprehend how human interference has affected the natural environment.
• Explain 'Greenhouse effect' and investigate the role of Carbon dioxide and methane in increasing greenhouse effect on Earth. Explain the harmful effects of ozone layer depletion and the factors responsible for it.
• Identify the role of pollutants in the biosphere and list the measures to control the effects of these pollutants.
• Recognise the need for alternate sources of energy even though they may have high installation/production costs.
• Realise and appreciate the need to protect the environment.
• Conclude that 'environment friendly practises' improve the quality of environment.

# Unit 20

Improvement of food resources

• Correlate the increasing demand of food to fulfil the needs of ever increasing population.
• Enumerate various methods of Crop Variety Improvement, Crop Production Improvement and Crop Protection Management and realize their importance.
• Conclude giving reasons, the importance of organic farming over use of chemical fertilizers and pesticides.
• Define the term Animal Husbandry
• Husbandry.
• Name and explain the types of animal farms.
• Enumerate ways to increase the production of animal farms.
• Interpret the use of genetic manipulation in agricultural practices.