Grade 3 Science(NSO) : Human body part 2

We have already covered Skeletal, immune, cardiovascular, muscular and integumentary system in part 1.

Grade 3 Science (NSO) : Human body part 1

Lymphatic system :

It is responsible for the removal of interstitial fluid from tissues. It absorbs and transports fatty acids and fats as chyle from the digestive system. It transports white blood cells to and from the lymph nodes into the bones.

-picks up fluids leaked from the capillaries
-supports immune systems: houses white blood cells Continue reading →

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) : 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 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

Grade3 Science (NSO) : Plants :Roots

Plants :Roots

Root

Root is the underground part of the plants body. It fixes the plant within the soil and absorbs water and mineral nutrients from the soil. It also stores excess food.

Function of roots

Roots attach the plant body to the ground. It provides support to the plant and helps in holding the plant firmly in the ground.

Root hairs of the plant absorb water and mineral from the soil and pass it to the stem.

Some roots like carrot, radish etc. store food.

Root bind the soil which otherwise may be blown away by wind or washed away by water. Root prevents soil erosion.

Types of roots

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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