Grade 3 Science (NSO) : Air and water

Before starting lets take a look at the Grade 1 lessons

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 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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Grade 2 Science (NSO) : Good habits and safety rules

Before starting lets take a look at the Grade 1 lessons

Human beings: Good habits

Safety: Safety rules

Safety: Traffic rules

Safety: Activities and worksheets

Safety Rules

Safety rules at home :

Do not play with match sticks, scissors, switches, plugs , fire, knives etc
Keep things in proper places afetr using them
Immediately inform an adult if you get hurt

Safety rules on the road

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Grade 2 Science(NSO) : Occupations

Occupations

Occupation is a job that people do to earn money. People have different occupations

Activities :

jobs-word-jumbles1 occupationWS

occupationWS

Grade 2 Science (NSO): Housing and Clothing

Housing and clothing

A quick look at the Grade 1 lessons

Human Beings:Different rooms in the house

Human Beings : Clothes we wear

A house is a place where we feel safe. It protects us from the sun, rain, wind, wild animals and thieves.

Types of houses

Permanent houses
1. These houses cannot be shifted from one place to another
2. People build these houses according to their needs.
3. Huts are made of mud, straw, wood , bamboo and clay and are not very strong (also called kucha house in india)
4. Flats and bungalows are made of bricks , cement, steel and concrete(mixture of cement, sand,small stones and water). These are very strong. (also called pucca house in india)
Temporary houses
1. Houses that can be moved easily from one place to another.
2. These are also called portable houses.
3. They are easy to make and cheap
4. Example
  1. Tent : Made of nylon or canvas.
    - Used by soldiers and campers.
  2. Houseboat : House made on boats that float on water bodies.
    - It is made of wood
  3. Caravan : A house on wheels is called a caravan