A look at the grade 2 lessons
Grade 2 Science (NSO): Human Body
Human beings: Parts of the body
Our body is made up of different organs and organ systems. There are in all 12 systems in our body
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Grade 3 Science (NSO) : Food part 3 – Preservation of food
Food Decay and Preservation
Bacteria and fungi are the main groups of decomposer organisms. Food decay is also known as food spoilage.
Bacteria and fungi need Food , Warmth and Moisture to grow.
There are several ways to stop or slow down the decay of foods. This is known as Food Preservation.
Food preservation methods
Freezing
Bacteria cannot reproduce at low temperatures.
Bacteria and fungi need warmth to grow. In low temperatures they stop growing.
Following is the list of food preserved by freezing;
- Meat
- Fish
- Fruits
- Vegetables
- Fresh foods
- Cooked foods
Drying
Removing water prevents the microorganisms from growing, or digesting the food.
Grade 3 Science (NSO) : Food Part 1 – Food Types
A look at the grade 2 lesson
Food can be divided into three types
Energy giving food
Give us energy to work. They contain carbohydrate and fats.
Carbohydrates
They are found in foods like rice, pasta, cassava, yam etc. when starchy foods are eaten and digested, simple sugars like glucose are obtained. It is this glucose that the body uses for energy.
There are two major types of carbohydrates:
1. Simple carbohydrates (Sugar)
- Fruits
- Milk
- White sugar you would find in a sugar bowl
- Chocolates
Grade 3 Science (NSO) : Food Part 2 – Methods of Cooking
Cooking of food
Cooking improves the flavor of food and also makes the food easier to chew and more digestible. Micro oirganisms present in the food are killed during cooking which makes the food safer to consume. Various methods of cooking are listed below :
Boiling
Involves cooking the food at the boiling temperature of water ie 100 degree centigrade.
Example : Eggs , potatoes etc
Advantages :
Grade 3 Science (NSO) : Earth and universe
A quick look at the Grade 1 lessons :
Weather and The Sky:GK questions on space
Weather and The Sky: Earth and Sky fundamentals
Solar system
Sun :
- It is a star.
- It gives us heat and light
- It is the main source of energy on the earth
- Eight planets and many heavenly bodies revolve around the sun.
Planets :
- Orbits the sun
- Has sufficient mass to be round, or nearly round
- Is not a satellite (moon) of another object
Grade 3 Science (NSO) : Birds
Bird, a warm-blooded vertebrate that lays eggs and has feathers and wings.
Type of beaks
Grade 3 Science (NSO) : Animals
A look at the grade 2 lessons :
Grade 2 science (NSO) : Animals
Animals and the way they eat
Herbivores : Animals like cows , buffaloes , sheep etc., that eat plants.
Carnivores : Animals like lions, tigers, etc., that prey on and eat other animals.
Omnivores : Animals like bears, crows etc., that eat both plants and animals.
Scavengers : Animals like vultures and jackals that eat dead and left over animals generally preyed on by carnivores.
Grade 3 Science (NSO) : Air and water
Before starting lets take a look at the Grade 1 lessons
Activities: Worksheets on Air and Water
Air
Living things need air to breathe
Moving air is called Wind
A gentle wind is called Breeze
A strong fast wind is called a Storm
A very strong wind is called Gale
Uses of moving air
A weather cock or wind vane is used to know the direction of the wind. At airports we use wind sock to know the direction of the wind. When aeroplanes fly in the direction of the wind , it saves fuel.
Wind makes windmill work. They are used to generate wind energy which is used to grind grains, pump water and make electricity.
Helps in sailing boats
A parachute falls slowly because of the wind
Grade 3 Science (NSO) : Flower, fruit and seed
Before starting lets take a look at the Grade 2 lessons
Plants : Uses of different plants
Flower
Responsible for reproduction
Colour and fragarence of flowers attract insects who act as pollinators.
Flower parts that we eat :
Grade 2 Science (NSO) : Rocks and minerals
Rocks
Earth is made up of hard matter called rocks. They come in different shapes, colour and size. Rocks are found under the soil, in rivers and seas. They are solid material made up of one or more minerals.
Rocks can be hard ( granite) or soft (chalk)
Some important rocks :
Granite :
Granite is a light-colored igneous rock with grains large enough to be visible with the unaided eye.
It is the most common igneous rock found on the Earth’s surface
Granite is composed mainly of quartz and fedspar with minor amounts of mica and other minerals. This mineral composition usually gives granite a red, pink, gray, or white color with dark mineral grains visible throughout the rock .
