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 2 Science (NSO): Human Body

Our wonderful body

Lets brush up on the basics first. The class 1 lessons will give a nice overview of our body.

Human beings: Parts of the body

Human Beings : Clothes we wear

Human beings :Healthy foods

Human beings : Sense organs

Human Beings and their needs Worksheets

Type of organs

External organs :

Parts of our body that we can see.

Head, skin, arms, legs, eyes , ears , nose , tongue etc

Skin in the biggest organ of our body

Sense organs are also external organs and they comprise of Nose (smell), Eyes(sight), Ears (hearing),

Tongue (taste), Skin (touch)

Internal organs :

Parts that are inside our body

Brain, heart, lungs, stomach etc

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Grade 2 science (NSO) : Animals

Animals

Lets brush up on the basics first. The class 1 lessons will give a nice overview of the animal life.

Animals: Classification

Animals:Type

Animals:Collective nouns

Animals:Lifecycle

Animals:Animal homes

Animals:Sounds animals make

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Papers : NSO Grade 1

NSO papers for class 1

ieo-nso-nco-imo

ieo-nso-imo-nco

nso-ieo-nco-imo

nso-ieo-imo-nco

nso_1

nso_2

nso_3

nso_4

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Air and Water : Properties

 

 

propertiesofAir

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Human Beings : Clothes we wear

Clothes we wear in different seasons.

clothes

Clothes we wear according to our profession.

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Safety: Traffic rules

safety2

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