The Solar System - Class 4 Science - New St. Mery English School

The Solar System is a fascinating family of the Sun and the objects that move around it. At the center of the Solar System is the Sun, which gives us heat and light. Around the Sun, there are eight planets that travel in fixed paths called orbits. These planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Our planet Earth is the only planet known to support life. Besides planets, the Solar System also includes moons, asteroids, and comets. All these heavenly bodies are held together by the Sun’s strong gravitational force.

In this chapter, we will learn about the Sun, the planets, and other interesting objects in space. Let us explore the amazing world of the Solar System and discover how our planet fits into this big universe! 

The Solar System - Class 4 Science - New St. Mery English School

What is Solar System?

Ans:- The Sun is a huge, hot ball of gases at the center. It gives us light and heat, which makes life on Earth possible.

What is sun?

Ans:- The Sun is a huge, hot ball of gases that is present at the center of solar system. It gives us light and heat, which makes life on Earth possible.

What are planets?

Ans:- The large celestial bodies that revolve around the sun on a fixed path and do not have their own light are called planets.

How many planets in solar system?

Ans:- There are eight planets in solar system. 

1- Mercury 

2- Venus

3- Earth 

4- Mars

5- Jupiter

6- Saturn

7- Uranus

8- Neptune 

Mercury - It is nearest planet to the sun. It is smallest and very hot during the day and very cold at night. 

Venus- It is second planet from the sun. It is the hottest and the brightest planet ,also called 'the morning and the evening star'. It also does not have any moon.

Earth:- It is the third planet from the sun. It is the only planet where life exists. It has all the suitable conditions to support life about seventy percent of Earth's surface is covered with water,so it is also called blue planet . The earth has one moon.

Mars:- It is fourth planet from the sun , also known as 'red planet's. It look red in colour. It has two moon.

Jupiter:- It is the fifth planet from the sun. It is the largest planet of the solar system. It has about 79 moons.

Saturn:- It is the second largest planet, sixth from the sun. It has seven wide rings around it which are made up of ice and dust . It has 62 know moons.

Uranus:- It is the third largest planet ,seventh from the sun.it has 27 known moons.

Neptune:- It is the eighth planet from the sun. It is the coldest planet in the solar system. Neptune has around 14 moons.

What are satellites?

Ans:- The object that revolve around a planet in an orbit is called satellite.

What is moon? 

Ans:- Moon is the natural satellite of the earth. It completes one revolution around the earth in 27 day. The moon does not have its own light but it reflects the light of the sun. It shines at night because of sun's light.

Write three feature of moon?

Ans:- three feature of moon.

1- It does not have the atmosphere as the earth has.

2- there is no water on the moon.

3- The surface of the moon is made up of rock and many mountains and crater.

What are artificial satellites? 

Ans:- The man - made object which move around a planet in an orbit are known as artificial satellites.

Which is the first artificial satellites of world?

Ans:- first artificial satellites was the sputnik-1 , launched by USSR on October 4,1957.

Which is the first artificial satellites of India?

Ans:- first artificial satellites Indian satellite was aryabhata. The launched on April 19,1975.

Write three uses of artificial satellites?

Ans:- three uses of artificial satellites are:

1- they are used to study weather conditions planets and stars.

2- they help in communication through telephone, radio and TV.

3- they are used in GPS ( global positioning system). 

What are stars?

Ans:- the number of twinkling objects that are appear in night sky are called stars.

Why does stars seer to be very small?

Ans:- stars are many times larger than the planets but they seems to very small because they are very far away from us.

Who is the nearest star to the earth?

Ans:- the sun is the nearest star to the earth .

What are constellation?

Ans:- the group of stars that from patterns in the sky are called constellation.

Ex:- ursa, major, ursa minor, Orion etc.

How many types of movement of earth? 

Ans:- there are two types of movement of earth.

1- revolution 

2- rotation 

What is orbit?

Ans:- the earth moves on a fixed path around the sun. This fixed path is called an orbit.

What is revolution?

Ans:- the movement of the earth around the sun in an orbit is called revolution. It takes 365 days to complete one revolution.

What is rotation?

Ans:- the earth spins on its own axis just like a top rotation on its pin. This is called rotation of the earth. It takes 24 days for the earth to complete one rotation.

Write two effects that eauses due to earth's movement ?

Ans:- the two effects that eauses due to earth's movement are.

1- the rotation of the earth causes day and night.

2- season are caused due to revolution of the earth around the sun.

Who divided the earth into two parts?

Ans:- the epuator divided the earth into two halves, called the northern hemisphere and the southern hemisphere.

Light And Shadow - Class 5 Science - New St. Mery English School

Light is an important part of our daily life. Without light, we would not be able to see anything around us. The Sun is the main natural source of light, while bulbs, candles, and tube lights are artificial sources of light. When light falls on an object, it can pass through, get blocked, or form a shadow.

In this chapter, we will learn how shadows are formed and why they change in size and shape. We will also understand the difference between transparent, translucent, and opaque objects. Fun activities and simple examples will help us explore how light travels and how shadows are created in our surroundings.

Light And Shadow - Class 5 Science - New St. Mery English School

What is Light?

Ans:- Light is a form of energy that helps us see things.

What are sources of light?

Ans:- The things that produce their own light are called sources of light.

Ex:- bulb, sun, stars etc 

How many types of sources of light?

Ans:- There are two types of sources of light.

1- Natural sources of light

2- Artificial sources of light

What are Natural sources of light?

Ans:- Natural sources of light are things in nature that produce their own light without being made by humans.

Ex:- Sun, Stars, glow worm etc.

What are Artificial sources of light?

Ans:- The man made things that produce light are called Artificial sources of light.

Ex:- electric bulb, torch, candles etc.

Write three properties of light?

Ans:- Three properties of light are

1- Light travels in straight line. This is called rectilinear propagation of light.

2- Light travels from one place to another.

3- White light is made up of seven colours.

What is Rainbow?

Ans:- When sunlight passes through rain drops, It splits into seven colours and makes a band of seven colours. This band of seven colours are Rainbow. It forms in the sky. The seven colours of rainbow are violet, indigo, blue, green, yellow, orange, and red (VIBGYOR)

How many types of objects on the basis of amount of light they allow to pass through them?

Ans:- There are three types of objects on the basis of amount of light they allow to pass through them.

1- Transparent objects

2- Translucent objects

3- opaque objects

What are transparent objects?

Ans:- Some objects that allow light to pass through them easily are called transparent objects.

Ex:- glass, water etc.

What are translucent objects?

Ans:- Objects through which only some light can pass are called translucent objects.

Ex:- Butter paper, frosted glass, thin cloth, oiled paper

What are opaque objects?

Ans:- Some objects that do not allow light to pass through them are called opaque objects.

Ex:- wood, stone etc.

What is shadow?

Ans:- A shadow is a dark patch formed when an object blocks the path of light. It is always formed on the opposite side to the source of light.

Write three conditions that is necessary for the formation of shadow.

Ans:- The three conditions that is necessary for the formation of shadow are

1- A light source

2- An opaque object

3- A surface such as wall, floor, table top etc.

Write five properties of shadow.

Ans:- The five properties of shadow are

1- The shadow is formed when light falls on an opaque or translucent object.

2- A shadow is formed on the opposite side of the source of light.

3- Shadow do not depend on the colour of the object. It is mostly black.

4- A shadow shows only the shape of the object and not its details.

5- The size of the shadow depends on the distance between the source of light and the object.

Weather And Season - Class 3 Science - New St. Mery English School

 Weather And Season - Class 3 Science - New St. Mery English School

Weather and seasons are important parts of our daily life. Sometimes the day is hot, sometimes it is cold, and sometimes it rains. These changes in the air around us are called weather. When a particular type of weather continues for many months, it forms a season.

In this lesson, Class 3 students will learn about different types of weather such as sunny, rainy, windy, and cloudy days. They will also understand the main seasons of the year — summer, rainy, winter, spring, and autumn — and how each season is different. Children will discover how seasons affect the clothes we wear, the food we eat, and the activities we do.

Learning about weather and seasons helps students understand nature better and observe the changes happening around them every day.

Weather And Season - Class 3 Science - New St. Mery English School

What is Weather?

Ans:- The day to day conditions of  air  of a place keeps changing everyday. This condition of air is called weather.

Write the factors that affect the weather.

Ans:- The factors that affect the weather are sun, wind, clouds and water vapour in the air. 

How many types of weather?

Ans:- There are five types of weather.

1- Sunny day

2- Cloudy day

3- Rainy day

4- Windy day

5- Cold day

What is Sunny Day?

Ans:- In sunny day, The sun is bright. Sky is blue and the air is warm. The hottest time of the day is noon because the sun is directly overhead.

What is Cloudy Day?

Ans:- In cloudy day, The sky is covered with clouds. Cloudy day is not very hot.

What is Rainy day?

Ans:- In rainy day, The sky is covered with dark clouds. It rains very heavily in rainy day. It is cold and wet.

What is Windy day?

Ans:- In windy days the wind blows strongly. 

What is Cold day?

Ans:- In cold day, The sun is not bright and cold wind blows. 

What is Season?

Ans:- When the weather remains same for a few months, It is called season.

How many types of season? Name them.

Ans:- There are five types of season

1- Summer Season

2- Winter Season

3- Rainy season

4- Autumn Season

5- Spring Season

What is Summer Season?

Ans:- Summer is the hottest season of the year. It comes after spring season and before the rainy season. We wear light cotton clothes in this season. We eat ice-cream and drink cold drinks in this season.

What is Winter Season?

Ans:- Winter is the coldest season of the year. It comes after autumn and before spring. In this season, we wear woollen clothes to protect us from cold. In this season we enjoy hot drinks.

What is rainy season?

Ans:- The rainy season is the time of year when a place gets most of its rainfall. It is also called monsoon season. It comes after summer season and before winter season. We use umbrella and rain coat in rainy season.

What is autumn season?

Ans:- Autumn is the season that comes after summer and before winter. It is the time when the weather starts becoming cooler. It falls after the rainy season and before the winter season. During this season, trees shed their leaves.

What is spring season?

Ans:- Spring is the season that comes after winter and before summer. It is known as the season of new life and fresh beginnings. We see beautiful plants and blooming flowers in this season.

 Water - Class 2 Science - New St. Mery English School

Water is one of the most important gifts of nature. All living things — humans, animals, and plants — need water to live and grow. We use water every day for drinking, cooking, bathing, washing clothes, and cleaning. Without water, life on Earth would not be possible.

Water comes from many sources such as rivers, lakes, ponds, wells, and rain. Rain is the main source of fresh water on Earth. It is very important for us to use water carefully and not waste it, because clean water is limited.

In this lesson, we will learn about the uses of water, its sources, and why we should save water. Water is life, so let us understand its value and protect it.

Water - Class 2 Science - New St. Mery English School

How many main sources of water? Name them.

Ans:- There are three main sources of water.

1- rain water

2- surface water

3- underground water

What is rain water?

Ans:- Water that we get in the form of rain is called rain water. It is the main source of water.

What is surface water?

Ans:- Water that is found on the surface of earth is called surface water.

Ex:- rivers, lakes, ponds, oceans etc.

What is underground water?

Ans:- Water that is found under the surface of earth is called underground water.

Ex:- well, handpump, tubewells etc.

How many forms of water?

There are three forms of water.

1- solid

2- liquid

3-gas

Which is the solid form of water?

Ans:- Ice

Which is the liquid form of water

Ans:- water

Which is the gasious state of water?

Ans:- water vapour

What is water cycle?

Ans:- The circulation of water on the earth in cyclic manner from land to sky and back to the land is called water cycle.

Write five uses of water.

Ans:- The five uses of water are

1- All living things need water to live.

2- Plants need water to prepare food.

3-We need water for drinking, cooking, bathing and cleaning

4- Flowing water is used for generate electricity.

5- Water is used in industries to carry out various processes.

Write five ways by which we can save water.

Ans:- The five ways by which we can save water are

1- Turn off the tap while brushing your teeth.

2- Get your leaking taps repaired.

3- Collect and store rainwater in tanks.

4- Use bucket while bathing.

5- Reuse RO waste water for washing, cleaning or watering .

 Water for Life- Class 1 Science- New St. Mery English School

Water is very important for all living things. We need water to drink, cook food, wash clothes, and keep ourselves clean. Plants and animals also need water to live and grow. Without water, life on Earth would not be possible. In this chapter, we will learn about the different uses of water, where we get water from, and why we should always save and keep it clean. Let’s discover why water is truly essential for life!

Water for Life- Class 1 Science- New St. Mery English School

1:- Why do we need water?

Ans:- We need water for drinking, washing, bathing and cooking food.

2:- What is the colour of water?

Ans:- Water is colourless.

3:- Where do we get water from?

Ans:- We get water from rain, rivers, ponds, lakes, wells and tap.

4:- Write six uses of water.

Ans:- The five uses of water are

1- Water is used for cooking. 

2- Water is used for washing clothes.

3- Water is used for bathing.

4- Water is used for drinking.

5- Water is used for watering the plants.

6- Water is used for putting out the fire. 

5:- Write five important sources of water.

Ans:- The five important sources of water are rain, rivers, ponds, lakes and wells .

 Light - Class 7 Science - New St. Mery English School

Light is a form of energy that enables us to see the beautiful world around us. Without light, everything would appear dark and invisible. The Sun is the main natural source of light for the Earth, while electric bulbs, candles, and tube lights are artificial sources of light.

Light travels in a straight line and helps us understand important concepts like reflection, shadows, and images formed by mirrors. When light falls on an object, it may be reflected, absorbed, or pass through it. This is why some objects are transparent, some are translucent, and others are opaque.

In this chapter, we will learn about sources of light, reflection of light, mirrors, and how light helps us see objects clearly. Let us explore the amazing properties of light and understand how it plays an important role in our daily life.

Light - Class 7 Science - New St. Mery English School

What is Light ?

Ans:- Light is the form of electromagnetic energy that makes everything visible. It can detected by human eyes.

What is rectilinear propagation of light?

Ans:- When light moves from one place to another, it follows a straight path as long as it travels through the same medium. This property of light is known as rectilinear propagation of light.

Ex:- When you switch on a torch in a dark room, the beam of light goes straight. You can see a straight line of light — that shows rectilinear propagation.

🌑 Shadow Formation

Shadows are formed because light travels in straight lines.
If an object comes in the path of light, it blocks the light and a shadow forms behind it.

Rectilinear propagation of light happens only when light travels in a uniform medium. When it changes medium (like air to water), it bends. That bending is called refraction.

Write an experiment that show that light travel in straight path

🎯 Aim

To prove that light travels in a straight path.

🧰 Materials Required

• 3 pieces of cardboard

• A candle

• Matchbox

• A table

🛠 Procedure

1. Take three cardboards of the same size.

2. Make a small hole at the center of each cardboard.

3. Fix the three cardboards vertically on a table in such a way that the holes are at the same height.

4. Place the cardboards in a straight line, one behind the other.

5. Put a lighted candle behind the first cardboard.

6. Look through the hole of the third cardboard from the other side.

👀 Observation

• When all three holes are in one straight line, the flame of the candle is clearly visible.

• If you move any one cardboard slightly to the side, the candle flame cannot be seen.

🧠 Conclusion

This experiment shows that light travels in a straight line. When the holes are aligned, light passes straight through them. When the path is disturbed, light cannot bend around the cardboard to reach the eye.

Reflection of light

When light hits an object like a mirror, it does not pass through. Instead, it returns back into the same medium. This is called reflection of light.

Types of Reflection

There are two types of reflection of light

1- Regular Reflection

2- Irregular Reflection

Regular Reflection

Regular reflection happens when light rays fall on a smooth, polished surface and reflect in an orderly, parallel way. In regular reflection parallel rays of light hit a smooth surface and the reflected rays also remain parallel.

Ex:- A plane mirror gives regular reflection. That’s why you can see a clear image of yourself in it.

Irregular Reflection

Irregular reflection happens when light falls on a rough surface and reflects in many different directions. In irregular reflection parallel rays of light hit a rough surface and the reflected rays scatter in different directions.

Ex:- When light strike on a wall it gives Irregular reflection, Reflection of light in water

ray of light?
Ans:- A ray of light is a narrow stream (प्रबहित होना ) of light that represents the path along which light energy travels in a medium is called ray of light.  it is represented by a straight line and an arrow marked on it. the arrow represents the direction of ray of light

beam of light?
Ans:- A group of light rays is called beam of light.

 types of beam of light?
Ans:- There are three types of beam of light.
           1- Parallel beam of light
           2- Convergent beam of light
           3 - Divergent beam of light

Parallel beam of light?
Ans:- When the rays of light travel parallel to each other then the collection of such rays is called parallel beam of light .

convergent beam of light?
Ans:- When the rays of light coming from the different directions and meat at a specific point then the collection of such rays is called convergent beam of light.

divergent beam of light?

Ans:- When the rays of light emerge from a point source of light and travel in different direction , such beam of light is called divergent beam of light.

What is incident ray?
Ans:- A ray of light that is coming from source of light towards the reflecting surface is called incident ray of light.

What is reflecting ray?
Ans:- A ray of light bouncing away from the reflecting surface after reflection is called reflecting ray.

What is point of incident?
Ans:- The point on a reflecting surface where incident ray, reflecting ray and normal meet together is called point of incident.

What is normal?
Ans:- A line drawn perpendicular to the reflecting surface is called normal.

What is incidence angle?
Ans:- An angle which is formed between incident ray and normal is called incidence angle. It is represented by ' i ' 

Incidence angle = ∠i

What is reflected angle?
Ans:- An angle which is formed between normal and reflected ray is called reflected angle. It is represented by ' r '.

Reflected angle = ∠r 

What are the 2 Laws of reflection of light?  

Ans:- The two laws of reflection are

1- The incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane.

2-The angle of incidence is equal to the angle of reflection. , ∠i  = ∠r .

Image

An image is the picture of an object formed when light rays coming from the object reflect from a mirror or refract through a lens and reach our eyes.

Real image

The image that can be obtained on a screen is called real image

Virtual image

The image that can not be obtained on a screen is called virtual image

What is mirror?

Ans:- Any smooth polished surface which can turn the rays of light back into the same medium is called mirror.

Ex:- looking glass, highly polished metal, still water, still oil etc

How many types of mirror?

Ans:- There are two types of mirror.

1- Plane Mirror

2- Spherical Mirror

What is Plane Mirror?

Ans:- A plane mirror is a flat and smooth surface that reflects light to form an image. A plane mirror forms an image that is virtual, erect, Laterally inverted and Same size of the object.

Living Creatures : Exploring Their Characteristics - Class 6 Science - New St. Mery English School

Have you ever wondered how we know that a plant, an animal, or even a tiny insect is a living thing? The world around us is full of both living and non-living things, but living creatures have some special features that make them different. In this chapter, we will explore those unique characteristics that all living organisms share.

Living things grow, breathe, need food, move, respond to changes around them, reproduce, and remove waste from their bodies. These processes are called life processes, and they help living organisms survive on Earth. From huge elephants to tiny ants and green plants, every living being shows these characteristics in one way or another.

Understanding these features helps us learn more about nature and the amazing diversity of life around us. Let’s begin our journey into the fascinating world of living creatures and discover what truly makes something “alive.” 🌱 

Living Creatures : Exploring Their Characteristics - Class 6 Science - New St. Mery English School

What are living things?

Ans:- Things which have lives are called living things.

Ex:- human, plants, animals, birds etc

What are Non-living things?

Ans:- Things which have no lives are called Non-Living things.

Ex:- river, mountain, buildings etc

Write some common features between living thing and non-living thing.

Ans:-  Some common features between living thing and non-living thing are

1- Both Living and Non-living thing possess mass, shape and occupy space.

2- Both Living and Non-living thing  made up of basic structural unit. In the case of Living thing, Cell is the basic structural unit. and Molecule is the basic structural unit of Non-living thing.

Cellular Organisation

What are Cellular Organisms?

Ans:- Those organisms that are made of cells are called Cellular Organisms.

Ex:- animals, plants, amoeba etc

How many types of cellular organisms?

Ans:- There are two types of cellular organisms.

1- Unicellular organisms

2- Multicellular organisms

What are Unicellular organisms?

Ans:- Those organisms that are made up of only a single cell are called Unicellular organisms.

Ex:- amoeba, paramecium, euglena, chlamydomonas, bacteria

What are Multicellular organisms?

Ans:- Those organisms that are made up of millions of cells are called Multicellular organisms.

Ex:- plants, animals and human beings etc

Eating and Feeding

What is Nutrition?

Ans:- The process of taking food in living organisms is called Nutrition.

How many types of living organisms on the basis of Nutrition?

Ans:- There are two types of living organisms on the basis of Nutrition.

1- Autotrophic

2- Heterotrophic

What are Autotrophic?

Ans:- Those living organisms that prepare their own food themselves are Autotrophic.

Ex:- Plants are autotrophic because they synthesize their food themselves in the presence of sunlight and using raw material like carbon dioxide and water.

What are Heterotrophic?

Ans:- Those living organisms that get their food from plants and other animals are Heterotrophic

Ex:- Human beings, animals, birds etc

Respiration

What is breathing?

Ans:- The act of taking in air is called breathing. During breathing, the organisms take in oxygen present in the air. This oxygen is used to break down complex food substances into carbon dioxide and water. During this process, energy is released.

Food + Oxygen → Carbon dioxide + Water + Energy

What is Respiration?

Ans:- The release of energy from food is called respiration. Respiration helps living things obtain this energy. Living things need energy to grow, to move and to fight diseases.

Describe the different organs present in different organisms to breathe.

Ans:- Humans breathe in air through the nostrils into the lungs. Animals living in water, such as fish, use their gills to extract dissolved oxygen from water. Some animals, which do not have gills or lungs, breathe in other ways. Earthworms breathe through their body surface while insects breathe through holes in their bodies called spiracles. Plants breathe through special openings present in their leaves called stomata.

What is Growth?

Ans:- Growth is the increase in size, height, weight, or mass of a living organism over time. All living things show growth. 

Ex:- A baby grows into child, A seedling grows into a tree, A chicken grows into a cock, etc

Is growth reversible or irreversible?

Ans:- Growth is irreversible because once a living thing has grown, it can not become small again.

Movement

Why is movement necessary in living organisms?

Ans:- Movement is necessary in living organisms because they move from one place to another in search of food, seeking protection from enemies and natural hazards that help them to survive on earth.

What is Locomotion?

Ans:- Locomotion is the movement of an organism from one place to another.

Ex:- Human walks, Birds fly, Fish swim, etc.

Excretion

What is Excretion?

Ans:- Elimination of wastes from the body of living organisms is called excretion. Animals excrete wastes from their bodies in the form of urine, stool and sweat. plants excrete gum and latex. plants like rubber, oak, and banyan trees excrete latex.

Response to stimuli

What is stimulus?

Ans:- Any change that produces an immediate action or response in an organism is called stimulus.

What is response?

Ans:- A response is the immediate action taken by an organism to adjust itself  according to the change.

Write about different kinds of stimulus that is responded by living organisms.

Ans:- All living organisms respond to different kinds of stimuli like touch, chemicals, heat, light and smell.

A turtle withdraws into its shell when sensing danger.

A bacterium swims away from concentration of harmful substances.

If you heat an animal, it will try to attack back or run away.

Sunflower shows response to stimuli mainly through movement toward light.

The touch-me-not plant shows a very clear response to touch, which is a type of stimulus. When the leaves of the touch-me-not plant are touched, shaken, or even exposed to strong wind, The leaflets quickly fold inward and the leaf droops down.

Reproduction

What is Reproduction?

Ans:- Reproduction is the process by which living organisms produce new organisms of their own kind.

Adaptation

What is adaptation?

Ans:- Living organism develops certain characteristics which help them to live and survive in their environment. This is called adaptation. Adaptation is the process by which a living organism learns to survive and reproduce in its environment.

Write some adaptations shown by different animals

Ans:- A polar bear has a thick fur to helps it keep warm in the polar regions.

A hawk has a sharp and hooked beak for tearing its prey.

A woodpecker uses its long and pointed beak to drill into the bark of trees to find insects.

A dog adapts to warm weather by shedding its hair.

Insect Eating plants

What are insectivorous plants?

Ans:- Insectivorous plants are special plants that trap and digest insects to get nutrients, especially nitrogen, because they usually grow in nutrient-poor soil.

Key points:

• They are green plants and can make their own food by photosynthesis 🌱

• They catch insects using modified leaves

• Insects provide extra nutrients, not energy

Common examples:

• Pitcher Plant – traps insects in a pitcher-shaped leaf

• Venus Flytrap – snaps shut when an insect touches it

• Sundew – has sticky hairs that trap insects

Life Span

What is Life Span?

Ans:- Life span is the total length of time for which a living organism lives, from birth to natural death.

Examples:

• Human – about 70–80 years

• Dog – about 10–15 years

• Butterfly – a few weeks

• Neem tree – hundreds of years

In short:-

Life span = Birth → Growth → Old age (maturity ) → Death

Write the organisms which show the characteristics of both living and non-living things.

Ans:- Viruses are the organisms which show the characteristics of both living and non-living things. Viruses need living cells to grow and reproduce. Most viruses can not survive for long if they are not inside a living thing. When viruses get inside living bodies, they multiply and make people sick.