Science
Here, you can find short notes for all the modules in science textbooks for listed grades.
11. Weather and climate
The Meteorological Department records weather conditions and also forecasts weather. Weather report includes the places of minimum and maximum temperature and the places of maximum rainfall during the last 24 hours. Can get information about the day’s weather form the www.meteo.gov.lk. Weather Weather is an atmospheric conditions at a particular place during a short time […]
10. Food related interactions
Food webs A diagram that shows the inter relationships among animals and plants for food is known as a food webs. Mode of nutrition of animals 2. Carnivores – Animals that consume only flesh. Lion, tiger, rat-snake 3. Omnivores – Animals that consume both fresh and plant. Man, Crow Some carnivorous animals have become omnivorous […]
09. Heat and its effects
The environment gets heated during the day time due to sunlight and it gets cool during the night. Heat is needed for the existence of life and for various phenomena to take place in the environment. Some countries have extreme cold weather and in some other countries extreme heat. Temperature is the amount of heat […]
08. Electricity for a comfortable life
Electricity makes our day today activities easier. Uses of electricity Simple ways of generating electricity 2. Solar cell 3. Dry cell Generating electricity with a lime fruit Activity Fix the two sheets of copper and zinc to the lime fruit. Remove the circuit in the birthday card and remove the battery from it. Next connect […]
07. Magnets
Magnets have the special property of attracting things towards its direction. Only some materials are attracted to a magnet. Objects use in magnets Chess board pencil case Different types of magnets Magnetic poles The area with a higher magnetism is known as the poles of a magnet. Attractive power of the magnet is more at […]
06. Sound and hearing
We can hear different types of sound when we are in the environment. (animals, human voices, horns) The objects that produce sound are called sources of sound. (Animals, musical instruments) Sounds in the environment Activity Make two equipment. Keep them on ear and listen to what you hear. Observation Intensity of sounds heard are in […]
05. Light and vision
The main factors that must be satisfied to have complete vision are light and the eye. Activity Cut a hole at the center of the lid. Cut another small hole on one side. Keep small object in the middle of the box and close the lid. Close the hole on top. First Observe – hole […]
04. Energy in day to day life
Energy is defined as the ability to do work. Energy needed to do activities. Day today activities Energy needed to do these activities. Wind propeller Activity Cut 10 pieces of coloured oil papers and make 2 holes each piece. Fix all pieces to the wire. After fixing the pieces insert rest of the holes into […]
03. Water as a natural resource
Water is natural resource given by nature. Sources of water Status of water Identify the status of the water Activity Put the ice cubes into the boiling tube and heat. Observation When ice cubes are heated they turn into liquid water. When further heated, water turns into vapour. Solid – glaziers (Northern poles and Southern […]
02. Things around us
The things around us can be categorized as Matter -Things with a mass and occupy space Pen, water air, table The amount of matter in an object is referred to as the mass of the object.Units – Kilograms (kg), grams (g), milligrams (mg)The international unit of measuring the mass is kilograms.(kg) Energy – Things without […]