Getting to Know Plants

IMPORTANT TERMS

Root System      - The parts of the plant that remain under the ground, form the root system.     

Shoot System     - All parts of a plant that are above the ground, form the shoot system.         

Creepers            - Plants with weak stems that cannot Read more...

Components of Food

IMPORTANT TERMS

Balanced Diet          A diet that contains different components of food in right proportion.

Deficiency disease   Diseases that are caused due to lack of nutrients in the body.     

Nutrients                 Substances needed by our body for proper growth

Obesity                   Condition due to excess of fat in the body

Constipation            Condition due to lack Read more...

Body Movements

IMPORTANT TERMS

Joints                         Place where two bones meet.

Skeleton                      A framework of hard and strong bones.

Vertebrae                     Small bones that make up the backbone.

Cartilage                      A tough, elastic tissue covering the end of the bones.

Streamlined                 Shape that is narrow in front and broader in the middle.

MOVEMENT IN ANIMALS

Each animal has Read more...

Changes Around US

IMPORTANT TERMS

Evaporation -               Changing from a liquid form to gaseous form is called evaporation.

Condensation -             Changing from a gaseous form to liquid form is called condensation.

Freezing -                    Changing from a liquid form to a solid form is called freezing.

Melting -                      Changing from Read more...

Separation of Substances

IMPORTANT TERMS

Mixture                                 Mixture is made up of two or more pure substance. Sea water is a mixture containing water, common salt and other various salts and minerals.

Types of mixture                    Mixtures are of two types—homogeneous and heterogeneous. Solutions are homogeneous mixtures, while suspensions and emulsions are heterogeneous mixtures.

Pure substance                      Substance Read more...

Fibre to Fabric

IMPORTANT TERMS

Ginning              - Process of separating cotton seeds from fibres.

Combing            - Technique of separating cotton seeds from fibres.

Spinning            - The process of making yarn from fibres.

Weaving            - Making fabric by arranging TWO set of yarns.

Knitting              - Making fabric by a series of connected loops of SINGLE yarn.

Shearing            - Removing the Read more...

Sources of Food

IMPORTANT TERMS

• Food - Food is a substance eaten by us to do work, grow, maintain our body and remain healthy.
• Meal - The food that is consumed at a particular time of a day is called a meal.
• Dish - A particular preparation of food, served as a part of a meal Read more...

Sorting Materials into Groups

IMPORTANT TERMS

Object                   - A thing that can be seen and touched is called an object.

Material                - The matter, of which an object is made is called material.

Solubility              - The maximum amount of substance which can dissolve in 100grams of water at a given temperature, is known as solubility Read more...

Living Thing and Habitat

IMPORTANT TERMS

Living Things - Those things which need food, water and air for their survival are called living things.  Example – human, fish, bird, snail, ant, insect etc.

Non-living Things - Those things which do not need food, water and air for their survival are called living things. Example- table, chair, Read more...

Electricity and Circuits

ELECTRICITY AND CIRCUITS

IMPORTANT TERMS

• Electricity - Electricity is the flow of electrical charge or power through a conducting medium like wire.

• Electric Circuit - An electric circuit is a path along which electricity can flow.
• Open circuit - The electric circuit in which there is a gap in the connections between the terminals Read more...

Water

WATER

IMPORTANT TERMS

Water Table: - The top level of the underground water is called the water table.

Surface Water: - Water present on the surface of the Earth is known as Surface water.

Groundwater: - Water that lies beneath the surface of the Earth is called underground water.

Potable Water: - The water suitable Read more...

Motion and Measurement of Distances

Motion and Measurement of Distances

IMPORTANT TERMS

Motion: - The change of position of a body with time, with respect to a stationary body.

Unit: - A unit is a fixed quantity or a standard of measurement with respect to which a physical quantity is measured.

Length: - The distance of something from one Read more...

Air Around Us

Air Around Us

IMPORTANT TERMS

Atmosphere: - Layer of Earth surrounding the surface of the Earth.

Pollution: - Presence of substances in the environment in quantities that are harmful to living beings.

Gills: - Special organs for respiration in aquatic animals such as fish.

Stomata: - Tiny pores for exchange of gases in plants.

Spiracles: - Read more...

Light, Shadows and Reflections

Light, Shadows and Reflections

IMPORTANT TERMS

Reflection:- Bouncing back of a beam of light after hitting any surface is known as reflection of light

Umbra:- The dark part of the shadow is known as umbra as it does not receive any light from the source.

Penumbra:- The partially dark region of a shadow is Read more...

Garbage In, Garbage Out

Garbage In, Garbage Out

IMPORTANT TERMS

Landfill: - A large area used for the disposal of waste.

Composting: - Recycling of organic wastes by burying them in compost pits.

Vermicomposting: - A type of composting done with the help of an earthworm called red worms.

Compost: - Decayed organic material used as fertilizer for growing Read more...