Materials Around Us | Chapter 1 Term 3 | 2nd EVS Environmental Science Questions and Answers

Materials Around Us | Chapter 1 | 2nd EVS Environmental Science

Term 3, Unit 1: This section provides solutions and answers for the evaluation exercises in the chapter "Materials Around Us".

Evaluation

1. Number the natural sources as ‘1‛ and the man-made materials as ‘2‛.

2. Write ‘T‛ if True and ‘F‛ if False.

(a) Most metals are strong. ( T )

(b) Wood cannot be cut. ( F )

(c) Rubber is not elastic. ( F )

(d) Wool keeps us warm. ( T )

3. Write the names of the materials that the given objects are made of. (Leather, Rubber, Metal, Clay)

Ans: Clay, Rubber, Leather, Metal

4. Complete the tabulation by using the given pictures and by adding one more object on your own.

(a) Wood : 1. Wooden box 2. Chair

(b) Rubber : 1. Gloves 2. Eraser

(c) Leather : 1. Purse 2. Belt

(d) Metal : 1. Key 2. Chain

Self Evaluation

(i) I can identify natural sources, man-made materials and the things made from them.

(ii) I know some properties of matter.

Materials Around Us: Class 2 EVS Term 3 Unit 1 Explained

Materials Around Us

2nd EVS Environmental Science: Term 3 Unit 1

You will learn about:

* Natural sources, man-made materials and things

* Matter - definition and properties

Introduction

We use many kinds of materials in our life. Nature is the source of all of them (e.g., tree). From these natural sources man makes many materials (e.g., wooden planks) which are used to make many other things (e.g., wooden basket).

Sources of Natural Materials

The sources of natural materials are plants, animals, rocks and soil.

From Plants..

From Animals..

From Rocks and Soil...

We get metal ores from rocks and soil

Think….

For today‛s need you are cutting me but for tomorrow‛s need plant more trees like me…

Write ‘A‛ for the animal, ‘P‛ for the plant and ‘M‛ for the metal sources of the given materials.

Wood

Let Us Discuss

Why do we make windows and cupboards from wood?

* Wood is a strong material. So furniture can be made from it.

* It is long lasting.

* It can be cut into pieces and can be given different shapes.

* Wooden pieces can be joined together to make many useful things

Natural source → Man-made materials → Man-made things

Natural source

Man-made materials

Using some tools, tree trunks are cut into wooden logs and planks.

Man-made things

Do you know?

Paper is made from wood pulp.

Rubber

Do you know from what material your eraser is made?

Rubber is made from the sap (a milky substance) of the rubber tree.

* Rubber is elastic; so rubber bands are made from it.

* It is also waterproof; so hand gloves are made from it.

* Elastic – Comes back to its original shape after being stretched

* Waterproof – Does not allow water to enter inside

The following things are also made of rubber.

Activity: Fill in the Blanks

Observe the pictures and fill in the blanks.

Write the names of the man-made things from wood.

1. Shelf 2. Spoon 3. Chair

Write the names of the man-made things from rubber.

1. Rubber Band 2. Mat 3. Cycle Tube

Fibre

Do you know how clothes and ropes are made?

Fibre is a material obtained from both plants and animals. Cotton and jute are the fibres got from plants. Wool and silk are fibres obtained from animals.

Fibre from the coconut tree is called coir. Many things are made from it.

Do you know? Silk thread is a strong material and is used in making parachutes.

The jute fibre is long, shiny and strong. Silk is the strongest natural fibre. We make many things like bags, mats and sarees from these fibres.

Wool keeps us warm; so sweaters, caps and socks are knitted using it.

Leather is flexible; so belts, watch straps and bags are made from it.

Put a tick (✓) for the correct pair and a cross (x) for the wrong one.

Clay

Do you like playing with clay?

* Clay is a natural material. It is a type of soil. When it is mixed with water, it becomes soft.

* It hardens as it dries; so, pots and other things can be made from it.

* A potter uses his tool, the potter‛s wheel, to make clay pots and other things.

I give you cool water without using electricity.

Metals

Have you seen the different vessels in your kitchen?

Metals are materials got from metal ores - e.g., Gold, Silver, Iron and Copper.

* Since metals are strong and hard, vehicles, gates and cooking vessels can be made from it.

* Metals are shiny.

* When heated, metals can be shaped into any form - small paper clips or a huge aeroplane.

Matter

Anything natural or man-made that occupies space is called matter.

Matter has properties like taste, smell, size and shape.

Orange is a natural thing. It occupies space.

A wooden basket is a man-made thing. It occupies space too.

These yellow laddus occupy the space in the bowl.

They are small, round in shape and are sweet to taste.

Final Questions

Many materials are used in making an object. Choose and write the correct pair of materials found in the given objects.

1. Materials found in motor bikes are _________ .

a. metals and clay

b. rubber and clay

c. metals and rubber

Ans : c. metals and rubber

2. _________ are found in these pots.

a. Clay and rubber

b. Metals and clay

c. Metals and rubber

Ans : b. Metals and clay

3. This belt is made of _________ .

a. fibre and rubber

b. metals and clay

c. metals and leather

Ans : c. metals and leather

4. This chair is made of _________.

a. metals and wood

b. fibre and rubber

c. metals and clay

Ans : a. metals and wood

The Pancha Bhutas: Term 2 Chapter 4 | 2nd EVS Questions & Answers

The Pancha Bhutas
2nd EVS Environmental Science : Term 2 Unit 4

Evaluation

1. Match the following.

Observe the image below where the five elements (Pancha Bhutas) are matched with their representations.

Correct Matches

(i) Land - Mountains

(ii) Water - River

(iii) Fire - Sun

(iv) Air - Blowing Wind/Clouds

(v) Space - Starry Sky

2. Write the names of the Pancha Bhutas related to the pictures.

( Space, Air, Land, Water, Fire )

Answers (from left to right):

(i) Fire

(ii) Water

(iii) Air

(iv) Land

(v) Space

3. Where do you see the Pancha Bhutas in the picture? Circle and write their names.

( Space, Air, Land, Water, Fire )

Elements Identified in the Picture:

(i) The sun represents Fire.

(ii) The vast sky represents Space.

(iii) The wind pushing the sailboat represents Air.

(iv) The sea represents Water.

(v) The island represents Land.

4. Two Pancha Bhutas are shown in each picture. Choose the correct pair and fill in the blanks.

( water and soil, fire and water, water and air )

Answers (from left to right):

fire and water, water and air, water and soil

Self Evaluation

I realise the importance of the Pancha Bhutas-earth, water air, fire and space and their role in my everyday life.

The Pancha Bhutas: Earth, Water, Fire, Air, Space | 2nd EVS Term 2 Unit 4

The Pancha Bhutas

2nd EVS Environmental Science: Term 2 Unit 4

You will learn about:

* Earth, Water, Fire, Air, Space

The Story of the Five Elements

One day loud sounds were heard near the huge banyan tree. Earth, water, fire, air and space (the Pancha Bhutas) were quarrelling there about who was the most important of them all. Let us hear what they had to say.

Earth: “Without me, where can plants grow? Where can people build their houses and live? So, I am superior”

Water: “No, I am the best! I occupy a major part of the earth. I am also a part of all living beings. Life is not possible without me ".

Fire: “No, no, I am the superior one because plants and people make food using me. I also provide heat and light to support life”.

Air: “I am the air. All living beings breathe me. Nobody can live without me. So, I am superior”.

Space: “I provide a place for all of you. The earth, the Sun, the moon and the stars are all in me. So, I am the most important".

On hearing all of them, the banyan tree said, “No life is possible without any one of you. So, none of you is superior to the other”.

The Pancha Bhutas realised that all of them were necessary for life on earth. They stopped quarrelling and greeted each other happily.

Activity: The Potter's Pot

The potter is making a pot. Shall we see how he makes it? Fill in the blanks with the words. (water, clay, air, fire, wheel)

Earth

The earth is the home for plants, animals and for all of us. We grow our food on the land. We move from place to place on the land and play on it. The land gives us all we need to make the different things that we use.

Avoid Using Plastic

Water

Water occupies a major part of the earth. All living things in the world need water to live. We get water from the rain. Water is used to drink, cook, clean things, bathe, swim and grow crops. Can you swim? Learn to swim with the support of your elders.

Many kinds of plants and animals live in water.

Think Zone

Every drop of water is precious. Do not waste it.

Which is the right way to get more rain? Put a tick (✔) in the box.

Activity: Name the Place

Fill in the blanks with the given words.

( road, tracks, field, play ground)

Air

Observe and Discuss.

What do you see in these pictures?

Air is everywhere around us. We cannot see the air because it has no shape or colour but we can feel it. Without air, living things cannot breathe.

We can smell things and hear sounds because of air.

Birds and aeroplanes move in the air.

Moving air helps us in many ways.

To dry our wet clothes

To get electricity from windmills

Do you know? : During storms and cyclones the wind speed is very high. Cyclones damage our buildings and trees.

Note for the teacher: Explain precautions to be taken during natural disasters.

Fire

Early man discovered that he could make fire. He used it to get heat and light for his daily needs.

Today we also use fire to make a variety of things.

Space

Space is that within which everything exists.

Activity: Uses of Fire

Put a tick (✓) mark at the places where fire is being used.