| Adaptation |
The process of adjustment to surroundings by animals and plants.
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| Aerial Animals |
Animals which spend most of their time in the air.
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| Amphibian |
Animals that live both on land and in water.
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| Apparent Weight |
The weight of an object in water.
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| Aquatic Plants |
Plants that grow in water.
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| Arboreal Animals |
Animals which live on the trees.
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| Atmosphere |
An envelop of air around the earth.
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| Basalt |
An igneous rock formed by lava, cooling on the earth’s surface.
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| Blood vessels |
Tubes that carry blood to different parts of the body.
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| Body building foods |
Foods that help us to grow and become strong.
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| Breathing |
The process of taking air into our lungs and releasing it out through nose or mouth.
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| Breeze |
Gentle wind.
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| Buds |
They are the parts of a plant which bloom into flowers.
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| Buoyant Force |
The upward force acting on an object in a liquid.
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| Carnivores |
Animals which eat the flesh of other animals.
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| Carvan |
A house on wheels.
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| Caterpillar |
Larva of a butterfly.
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| Cereals |
Certain grass—like plants that produce grains that can be eaten.
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| Cerebellum |
A part of brain that helps to control the movements during reflex action.
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| Cerebrum |
The largest part of the brain.
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| Chlorophyll |
Green pigment present in leaves.
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| Claws |
A pointed horny nail on an animal’s or bird’s foot.
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| Cleanliness |
The habit of staying clean.
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| Climbers |
Weak plants that need support to remain erect and climb.
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| Cloth |
Any material made from fibres.
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| Clouds |
A visible mass of condensed water vapour floating in the atmosphere.
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| Clouds |
A visible mass of condensed water vapour floating in the atmosphere.
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| Compound |
Mater made up of different kinds of atoms combined in fixed numbers.
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| Condensation |
Process in which water vapour changes into water on cooling.
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| Constellation |
Group of stars arranged in an interesting pattern.
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| Cooking |
The art or process by which food is made more digestible by heating.
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| Creepers |
Weak plants that grow along the ground.
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| Crown |
It is the part of a tooth above the gum.
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| Decantation |
Gently pouring a clear liquid into another vessel after sedimentation.
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| Deficiency Disease |
They are caused by lack of a particular vitamin or mineral.
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| Dentine |
It is a layer below the enamel, made of tough tissues.
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| Digestion |
It is a process by which the food we eat is changed into simple substances.
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| Dispersal |
Scattering things over a wide area.
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| Distillation |
Purification of water by changing it vapour by heating and cooling the vapour to obtain in pure water.
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| Domestic Animals |
Animals kept at home or in farms.
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| Downstroke
Movement
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The movement of wings downward and forward.
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| Drainage |
A process or means of carrying off the waste water from the house.
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| Dye |
A substance used for colouring.
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| Earth |
Our own planet.
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| Enamel |
The outermost, hardest substance of a tooth.
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| Endangered |
Animals that are very few in numbers and may soon no longer exist.
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| Energy |
Ability to do work.
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| Energy giving foods |
Foods that give energy to work and play.
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| Evaporation |
Process in which water changes into water vapour on heating.
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| Exercise |
Any activity that makes our body healthy and strong.
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| Exosphere |
The outermost layer of the atmosphere of the earth.
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| Filtration |
Removing impurities through a filter paper.
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| First-Aid |
Immediate help given to the victim or to the injured.
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| Flightless Birds |
Birds which cannot fly.
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| Floating Ribs |
Two pairs of lower ribs which are not attached to the breast bone.
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| Flower |
The beautiful part of plant that produces seeds of fruits.
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| Footpath |
It is a pavement or a path on the side of road where the people walk.
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| Fracture |
A crack or break in a bone.
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| Freezing |
Water turning into ice when cooled.
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| Fruit |
The fleshy part of a plant that produces seeds.
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| Gale |
Very strong wind.
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| Gas |
A substance which does not have a fixed shape, fixed volume. It fills the entire space of the vessel.
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| Gemstones |
Mineral commonly used to make jewellery.
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| Geothermal Energy |
Energy from the earth.
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| Germination |
The change of a seed to a plant.
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| Germs |
Very small living things that can make us ill.
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| Gills |
They are used by fish to breathe under water.
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| Grains |
They are small, hard seeds. They are usually ground into flour to make bread.
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| Green plants |
Plants that have chlorophyll in their leaves.
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| Ground water |
Rainwater that seeps into the ground.
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| Habitat |
The home or natural environment of a living thing.
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| Hatching |
Emerging of young ones from eggs.
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| Health |
Condition of a person’s body and mind.
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| Herbivores |
Animals which eat plants.
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| Herbs |
Small and weak plants.
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| House |
A place where we live in.
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| House boat |
A house on a boat.
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| Igloo |
A house made of blocks of ice.
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| Impurities |
Substance that make water unfit for consumption.
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| Incubate |
Keeping eggs warm, usually by sitting on them.
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| Insecticides |
They are chemicals used to destroy harmful insects on plants.
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| Insectivorous Plants |
Plants which eat animals.
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| Insects |
Small animals having six legs.
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| Ionosphere |
The layer above the stratosphere which reflects radio waves back to the earth.
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| Joint |
It is the place where two or more bones meet.
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| Kilogram |
The standard unit of mass.
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| Lava |
Molten rock that reaches the earth’s surface and flow out through a volcanic vent.
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| Leaf |
The part that makes food for the plant.
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| Ligaments |
Tough tissues by which the bones are held together.
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| Liquid |
A substance which has a fixed volume but no fixed shape. It can flow.
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| Litre |
The standard unit of volume.
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| Living things |
Things which grow, feel, breathe, take food and move on their own.
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| Machines |
They help us to do a job and can make our work easier. Machines can also do things for us that we cannot do ourselves.
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| Maintenance |
The process of preserving.
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| Mammals |
An animals that gives birth to young ones and nourishes them with milk.
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| Matter |
Anything which takes up space.
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| Medulla |
The brain stem which connects the brain to the spinal cord.
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| Metre |
The standard unit of length.
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| Microbes |
They are very small living organisms which can be seen only with a powerful microscope.
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| Migration |
The movement of animals from one place to another to avoid the cold or to find food and water.
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| Mineral |
Material of which rocks are made.
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| Moon |
Looks like a big white ball which can be seen in the night sky.
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| Motor Nerves |
The nerves which carry messages from the brain.
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| Muscles |
Soft parts below the skin.
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| Nest |
A bird’s home.
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| Neurons |
The nerve cells which bind together to form a nerve.
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| Non-living things |
Things which do not grow, feel, breathe, take food and move on their own.
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| Nutrients |
Nourishing substances which help the body to grow.
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| Nymphs |
Young ones of an insect resembling the parents.
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| Omnivores |
Animals which eat both plants and animals.
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| Optic Nerve |
A nerve at the back of the retina.
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| Orbit |
It is the path followed by planets travelling around the sun.
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| Pebbles |
Small pieces of rocks.
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| Pet Animals |
Animals kept at home for our entertainment.
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| Photosynthesis |
The process by which green plants make food with the help of chlorophyll, water, sunlight and carbon dioxide.
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| Planets |
They are eight huge ball-shaped objects moving around the sun.
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| Posture |
It is the position in which we hold our body.
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| Potassium
permanganate
|
It is a chemical substance used to kill germs in water.
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| Preservation |
Preventing cooked or uncooked food from getting spoiled.
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| Protective foods |
Foods that protect you from falling sick.
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| Pull |
To draw an object towards oneself.
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| Pulleys |
They are wheels used with ropes to lift things.
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| Pulses |
Seeds of certain plants that can be eaten.
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| Push |
To move a thing forward.
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| Rainwater |
Water from rain.
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| Reflex Action |
The automatic actions for which we do not think before acting.
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| Reproduction |
Producing young one of their own kind the living being.
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| Rest |
To sleep, to refresh our body.
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| Ribs |
The long curved bones in the human body that form the rib cage.
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| Rock |
Solid material that comprises the earth’s crust.
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| Rodents |
Animals like rats, squirrels etc., which gnaw their foods
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| Root |
The part that is under the ground and fixes the plants in the soil.
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| Safety |
Staying away from harm.
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| Safety Rules |
Rules which you must follow to keep yourself safe.
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| Sanitation |
The system of disposal of sewage and refuse from the houses.
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| Satellite |
Heavenly bodies which revolve around the planet.
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| Scales |
They are thin overlapping plates, covering and protecting fish and reptiles.
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| Scratching Birds |
Birds that can scratch the ground with their claws for food.
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| Sedimentation |
Process in which the impurities settle down at the bottom.
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| Sediments |
The particles (soil or rock) which settle down in water.
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| Seed |
The part of the fruit that has a baby plant inside it.
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| Seedling |
A small baby plant coming out of a seed.
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| Sense organs |
Organs that help us to know the world around us. The five sense organs are skin, nose, eyes, ear and tongue.
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| Sensory Nerves |
The nerves which are connected to the sense organs.
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| Shadow |
Dark shape formed when an object blocks the light falling on it.
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| Shelter |
A place giving protection from heat, cold, rain and enemies.
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| Shrubs |
Small but strong plants.
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| Siphon |
A ‘U’ shaped tube used to raise a liquid from a container at a higher level and deliver it to a lower level.
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| Skeleton |
It is the framework of bones in the body.
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| Slate |
A metamorphic rock which splits into thin slices.
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| Sling |
A piece of long cloth or a bandage passing over the shoulder to support the fractured arm.
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| Smoke |
Particles of gas give out when something burns.
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| Soil Profile |
Sequence of layers of soil.
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| Solar Energy |
Energy from the sun.
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| Solar System |
The sun, eight planets and their moons together form our solar system.
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| Solid |
A substance which keeps its shape and volume fixed.
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| Space |
The place beyond the blanket of atmosphere.
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| Splint |
A piece of cardboard or sheet of newspaper used to hold a broken bone in its right position.
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| Stars |
The bright heavenly bodies that can be seen in the night sky.
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| Steam |
Vapour is formed when water boils.
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| Stem |
The main part of the plant above the ground from which leaves or flowers grow.
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| Stilt Houses |
Wooden houses built on raised platforms with sloping roofs.
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| Stomata |
Tiny openings lower side of the leaf.
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| Storm |
Fast and strong wind.
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| Stratosphere |
The layer above the troposphere.
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| Sun |
A big hot ball of fire.
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| Surface water |
Water in lakes, seas, ponds etc.
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| Synthetic |
Artificial fibres produced by man.
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| Talons |
Sharp claws of fish-eating birds.
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| Teeth |
A set of enamel-coated hard bone structures in the jaws of human and animals.
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| Temporary House |
A weak house made up of mud, straw, leaves etc.
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| Tendons |
The strong fibres by which the muscles are attached to the bones.
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| Tent |
A house made of cloth.
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| Terrestrial Plants |
Plants that grow on land
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| Thermometer |
An instrument used to measure temperature.
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| Thorn |
The sharp pointed small part on the stem.
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| Tides |
Rising and falling movements of the ocean water.
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| Traffic Signal |
An automatic signal, controlling road traffic by coloured lights.
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| Trees |
Big and strong plants
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| Troposphere |
The lowest layer of atmosphere.
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| Upstroke Movement |
The movement of wings upward and backward.
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| Ventilation |
A provision which causes air circulation freely in a room.
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| Veterinary Doctor |
A doctor which treats sick animals.
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| Victim |
Someone who has been attacked or injured.
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| Vitamins |
Chemical substances that are found in food. Our body needs them to stay healthy.
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| Wading Birds |
Birds that can walk through shallow water.
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| Water |
A precious natural resource
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| Water Filter |
We use it at home to filter drinking water.
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| Water Vapour |
It is formed when water gets heated.
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| Weather |
Condition of the air at a particular time.
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| Well |
A deep hole dug in the ground from which people get water.
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| Wild Animals |
Animals that live in Jungles and forests.
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| Wind |
Moving air.
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| Wings |
Parts that help animals to fly.
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| Wire-gauge |
A fine mesh of wires.
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| Zebra Crossing |
Lines made on the road used for crossing the road safely.
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