Things Around Us - Class 2 Science - New St. Mery English School

The world around us is full of different things. Some are living, like people, animals, and plants, while others are non-living, like rocks, toys, and furniture. In this chapter, “Things Around Us,” we will learn to identify and classify these things. We will understand how living things grow, move, and need food, while non-living things do not. This topic helps us observe our surroundings carefully and appreciate the variety of things that make our world beautiful and interesting.

Things Around Us - Class 2 Science - New St. Mery English School

What are natural things?

Ans:- Things that are found in nature are called natural things.

Ex:- plants, soil, sun, moon, water, rock etc

How many types of natural things?

Ans:- There are two types of natural things.

   1- Natural living things

   2- Natural non-living things

What are Natural living things?

Ans:- The natural things that have lives are called Natural living things. They can grow, move, take food, breathe and reproduce.

Ex:- plants, animals, human beings, birds etc.

What are Natural non-living things?

Ans:- The natural things that do not have lives are called Natural non-living things. They can not grow, move, take food, breathe and reproduce.

Ex:- sun, moon, river, rocks, soil etc.

What are man-made things?

Ans:- Things that are made by man are called man-made things.

Ex:- table, chair, pen, rubber, buildings etc.

What is Material?

Ans:- The substance from which a thing can be made is called material.

Ex:- wood, rubber, plastic, metals etc.

Write five things that are made from wood.

Ans:- chair, table, bed, doors and windows

Write five things that are made from rubber.

Ans:- tires, rubber band, eraser, shoes, gloves 

Write five things that are made from metals.

Ans:- vehicle, utensils, aeroplane, ship, gun

Write five things that are made from plastic.

Ans:- buckets, mug, comb, storage container, toy

Write three materials that are natural things.

Ans:- wood, rubber and metals

Write a material that is man-made thing

Ans:- plastic

 Air Around Us - Class 1 Science - Question and Answer

Air is all around us, though we cannot see it. We need air to breathe and live. Plants, animals, and humans cannot survive without air. Air also helps us in many ways – it helps birds to fly, moves kites and balloons, and makes windmills work. Even though we cannot touch or see air, we can feel it when it moves as wind. In this chapter, we will learn about the importance of air and how it is useful in our daily life.

Air Around Us - Class 1 Science - Question and Answer

1:- Why can we not see air?

Ans:- We can not see air because air is colourless.

2:- Why do we need air?

Ans:- We need air to breathe.

3:- What is breeze?

Ans:- gentle moving air is called breeze. It is soft and pleasant.

3:- What is wind?

Ans:- Fast moving air is called wind.

4:- Write two properties of air?

Ans:- The two properties of air are

1- Air has weight but no smell of its own

2- Air occupies space.

5:- Write two uses of air?

Ans:- The two uses of air are

1- All living things need air to breathe.

2- Air is needed for burning

 Keeping Healthy-Class 1 Science-Question and Answer

Good health is one of the most valuable things in our life. To stay healthy, we need to take care of our body and mind every day. Keeping healthy means eating good food, drinking clean water, doing exercise, sleeping well, and keeping ourselves clean. A healthy person feels happy, active, and full of energy. In this chapter, we will learn about simple habits that help us to stay strong and healthy, such as bathing regularly, brushing our teeth, washing our hands, playing outdoor games, and eating fruits and vegetables. By following these good habits, we can protect ourselves from illness and enjoy a happy life.

Keeping Healthy-Class 1 Science-Question and Answer

1:- What is cleanliness?

Ans:- The habit of staying clean is called cleanliness.

2:- Write five good habits that we can follow to keep ourselves clean?

Ans:-

1- Brush our teeth twice a day.

2- take a bath every day.

3- Comb our hair to keep it tidy.

4- Wash our hands before and after eating food.

5- Wear clean clothes every day.

3:- What keep us fit and healthy?

Ans:- Rest, exercise and play keep us fit and healthy.

4:- Who gives us rest and makes us feel fresh?

Ans:- Sleep gives us rest and makes us feel fresh.

5:- How much time should we try to sleep every night?

Ans:- Seven to eight hours

6:- Who help to keep ourselves and our surroundings clean?

Ans:- Good habits help to keep ourselves and our surroundings clean

7:- Write four good habits that help to keep our surroundings clean?

Ans:-

1- Throw wastes into dustbin.

2- Do not spit on the floor or on the road.

3- Cover your mouth with a handkerchief while sneezing or coughing.

4- Do not write on the walls of houses or buildings.

Respiratory System- Class 4 Science- Question and Answer

The respiratory system is one of the most important systems of our body. It helps us to breathe in oxygen from the air and breathe out carbon dioxide, which is a waste gas. Every living being needs oxygen to live, and our respiratory system makes sure that this oxygen reaches every part of the body. The main organs of this system are the nose, windpipe, and lungs. With the help of these organs, our body takes in fresh air, cleans it, and uses the oxygen to give us energy. Without breathing, we cannot survive even for a few minutes.

Respiratory System- Class 4 Science- Question and Answer

What is respiratory system?

The human respiratory system is a system of organs. That is responsible for gas exchange between the body and the external environment.

2:- How many main parts of a respiratory system?

Ans:- There are three main parts of a respiratory system.
1-nose
2-wind pipe
3-lungs

 Explain nose of human body?

Ans:- Nose is the external part of human body. It is the first part of human body.Ithas two holes called nostrils. Tiny hairs are present inside the nostrils which filter dust and other particles present in the air.

Explain wind pipe of human body?

Ans:- Wind pipe is the internal part of human being. It is also called trachea. The main function of wind pipe is to connect the nose to the lungs. It also takes air down to the lungs in the chest region.

Explain lungs of human body?

Ans:- Lungs are the main organs of the respiratory system. They are located inside the chest and ribcage. They are protected by rib cage. We have two lungs- The left lung and the right lung. When we breathe in, our lungs fill with air that has oxygen. Our body uses oxygen to get energy. When we breathe out , the lungs push out carbon dioxide, which is a waste gas. Lungs are the only organs of our body that can float on water.

What is breathing?

Ans:- Breathing is a process in which we take in air and then expel it out from the body.

How many phases of breathing? Name them.

Ans:- There are two phases of breathing.
1-inhalation
2-exhalation

What is inhalation?

Ans:- Inhalation is the process in which we take in air. When we breathe in, air fills the lungs so the chest moves outward.

What is exhalation?

Ans:- Exhalation is the process in which we breathe out air. when we breathe out, air comes out from the lungs and the chest moves inward.

Which gas do we breathe in?

Ans:- We breathe in oxygen gas.

Which gas do we breathe out?

Ans:- We breathe out carbon dioxide gas which also contains germs and water vapour.

How does respiratory system work? Explain its functions.

Ans:- The respiratory system  works by following ways.

1-As we breathe in air, the lungs are filled with fresh air reach in oxygen. This oxygen reaches different body parts through blood.

2-in return, the body parts give out carbon dioxide which reaches the lungs through blood. The lungs expel this carbon dioxide in the air we breathe out.

Air and Water - Class 3 Science - Question and Answer 

Air and water are very important for all living things. We cannot see air, but it is all around us. Air helps us to breathe, fly kites, and move things like sailing boats and windmills. It also carries clouds, dust, and smoke.

Water is another gift of nature. All plants, animals, and humans need water to live. We use water for drinking, cooking, washing, bathing, cleaning, and farming. Without air and water, life cannot exist on Earth.

This chapter will help us learn about the importance of air and water, their uses, and ways to keep them clean.

Air and Water - Class 3 Science - Question and Answer

What is air?

Ans:- Air is a natural thing which we can feel but can not see or touch. It helps us in breathing.

How many types of air according to movement?

Ans:- There are four types of air according to movement.

1- Still air

2- breeze

3- wind

4- storm

What is still air?

Ans:- When air does not move, It is called still air.

What is breeze?

Ans:- gentle moving air is called breeze. It is soft and pleasant.

What is wind?

Ans:- Fast moving air is called wind.

What is storm?

Ans:- Very fast and strong air along with rain and thunder is called storm. It is very harmful.

What does air contain?

Ans:- Air contains many gases, water vapours, dust particles, smoke and germs.

Name the main gases present in the air

Ans:- The main gases present in the air are nitrogen, oxygen, and carbon dioxide.

Write eight uses of air.

Ans:- The eight uses of air are

1- All living things breathe in oxygen present in air.

2- plants need carbon dioxide present in air to make food.

3- nitrogen is very important for the growth of the plants.

4- air is needed for burning. oxygen in the air helps in burning. 

5- air helps birds to fly.

6- air helps to run wind mills.

7- air dries our clothes faster.

8- air fills up our balloons and tyres. 

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 melting?

Ans:- Melting is the process by which a substance changes from the solid phase to the liquid phase.

      Ex:- Ice melts to become water that is liquid.

What is evaporation?

Ans:- Evaporation is the process by which a substance changes from liquid phase to the gasious phase.

  Ex:- Water boils to become water vapour that is example of evaporation.

What is condensation?

Ans:- Condensation is the process by which a substance changes from gasious phase to the liquid phase.

      Ex:- Water vapour cools to become water.

What is freezing?

Ans:- Freezing is the process by which a substance changes from liquid phase to the solid phase.

     Ex:- When water cools down below the 0 degree celsius it becomes ice.

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.