Grade 3 Science (NSO) : Human body part 1

A look at the grade 2 lessons

Grade 2 Science (NSO): Human Body

Human beings: Parts of the body

Human beings : Sense organs

Our body is made up of different organs and organ systems. There are in all 12 systems in our body

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.

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Grade 3 Science (NSO) : Food Part 1 – Food Types

A look at the grade 2 lesson

Grade 2 Science(NSO) : Food

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

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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 :

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Grade 2 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

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Grade 3 Science (NSO) : Birds

Bird, a warm-blooded vertebrate that lays eggs and has feathers and wings.

Type of beaks

 

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Grade 3 Science (NSO) : Animals

A look at the grade 2 lessons :

Animals:Lifecycle

Animals:Animal homes

Grade 2 science (NSO) : Animals

Animals:Baby names

Animals:Domestic and Wild

Animals: Classification

Animals:Facts about 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.

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Grade 2 Science (NSO) : Air and water

Before starting lets take a look at the Grade 1 lessons

Air and Water : Properties

Air and Water : Use

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

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Grade 3 Science (NSO) : Flower, fruit and seed

Before starting lets take a look at the Grade 2 lessons

Plant – Types of plants

Plants – Parts we eat

Plants: Fruits

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 :

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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 .

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