SOLUTION

The industrial waste buried in pits, contains harmful chemicals that contribute towards soil/land pollution.

SOLUTION

Some of the non-biodegradable wastes are:

1. plastic

2. metal

3. glass

4. styrofoam

SOLUTION

False

SOLUTION

Countries celebrate ‘World Environment Day’ because it is a step towards creating awareness about the issues of environment.

SOLUTION

a. Death of sea creatures due to contamination of sea water.

b. Layer of oil on the water surface due to oil spill.

SOLUTION

Water should be purified before drinking because it might contain harmful pollutants which can cause diseases like cholera and dysentery.

SOLUTION

The three causes are:

1. industrial waste

2. insecticides

3. oil spills

SOLUTION

In the image, people are washing dirty utensils in the pond. This will lead to water pollution.

SOLUTION

Agree

SOLUTION

Water pollution is the pollution of water bodies like river, lakes, seas and oceans through the dumping of pollutants into them.

SOLUTION

Acid rain

SOLUTION

Smog causes reduction in visibility and difficulty in breathing.

SOLUTION

Smog is the mixture of smoke and fog.

SOLUTION

SOLUTION

Panda

SOLUTION

a.)        Herbivores are the animals that eat only plants and plant material. 

b.)        Carnivores are the animals that eat only meat. 

c.)        Omnivores are the animals that can eat both plant materials and meat. 

SOLUTION

Gram

SOLUTION

It is an omnivorous animal which can eat both meat and plants.

SOLUTION

a.)        i)  plants

b.)        ii) omnivorous

c.)        i)  vegetarians

d.)        i) carnivorous

e.)        i) animals

SOLUTION

SOLUTION

2. herbivore

SOLUTION

2. Carnivores

SOLUTION

Inland letter

SOLUTION

Facsimile

SOLUTION

Telex machine and FAX machine

SOLUTION

Communication is the process of sending and receiving messages which convey our thoughts and ideas.

SOLUTION

A telegram is a means of communication which is sent in case of emergency or to convey urgent news.

SOLUTION

Alexander Graham Bell

SOLUTION

Non-verbal communication

SOLUTION

Television/Radio

SOLUTION

Mime

SOLUTION

Communication is verbal when we speak and communication is non-verbal when it is through gestures.

SOLUTION

Deaf people use hand movements to convey their thoughts and ideas and they understand what others are saying through their lip movements.

SOLUTION

There are 6 first aid scenarios:

Deep Cut, Minor Cut, Nose Bleeding, Fainting, Insect Bite, Burns.

SOLUTION

We should keep calm and wash our hands properly before giving first aid.

SOLUTION

Antiseptic lotion, Cotton Pads, Sterilized Gauge, Scissor, Band Aids, Crepe Bandage, Antiseptic Cream, Methyl Spirit.

SOLUTION

Itis an immediate help given to an injured person.

SOLUTION

Using a mobile phone can distract us while driving and cause an accident.

SOLUTION

Tying seatbelt while driving a car saves us in case of accident.

SOLUTION

The given picture indicates the presence of a fuel filling station or petrol pump.

SOLUTION

The picture shown above indicates that there is a restaurant, hotel or some eating place nearby.

SOLUTION

The given symbol means no horn or no honking.

SOLUTION

We should always wear a helmet while driving a two wheeler.

SOLUTION

1. No U – turn

2. Zebra crossing

SOLUTION

We should cross the road at zebra crossing.

SOLUTION

Two safety measures that we should follow while driving:

1. Never use mobile phones while driving.

2. Drive the vehicle at the set speed limit.

SOLUTION

Safety measures are some guidelines that we should follow to avoid accidents or mishap at a place.

SOLUTION

While rotating on its axis,  the spins from West to East.

SOLUTION

The Earth takes 24 hours to rotate on its axis.

SOLUTION

The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, whereas Pluto is classified as a dwarf planet in the year 2006 by Indian Astronomical Union (IAU).

SOLUTION

Rotation of the Earth

SOLUTION

Revolution of the Earth

SOLUTION

Solar system comprises of the planets that orbits the sun, along with other heavenly bodies like moon, comets, asteroids, meteors and dust particles.

SOLUTION

The movement of the Earth around the sun is called revolution of the Earth.

SOLUTION

Spinning of the Earth on its axis, is termed as rotation.

SOLUTION

The Earth’s axis is an imaginary line that passes through the centre of the Earth.

SOLUTION

The Earth appears blue, due to the oceanic waters.

SOLUTION

The Earth is always rotating on its axis. The part of the Earth facing the sun, has daytime, while the part of the Earth not facing the sun has night.

SOLUTION

If the Earth did not revolve around the Sun, then there will be no change of seasons.

SOLUTION

If the Earth does not rotate, then half of the Earth facing the Sun will always be having a day and the other half will always be having night.

SOLUTION

SOLUTION

a) spherical

b) 365 days 

c) two 

d) imaginary 

e) rotation

SOLUTION

Forests help in maintaining the water cycle in the environment. The deforestation would reduce the number of trees, and hence the water cycle will be affected, leading to a scanty rainfall.

SOLUTION

The waste should be segregated before discarding it.

SOLUTION

• We must not burn down trees, because it destroys the fertility of the soil.
• We must ensure that, for every single tree chopped, we must plant 10 more saplings to maintain the green cover.
• Sewage and industrial waste water should be treated properly to reduce the amount of chemicals and poisonous materials in it, before releasing them into water bodies.
• We should minimise the use of plastic items and polythene bags.
• We should not blow horns unnecessarily and should not play loud music.
• We should emphasise on using public transport and prefer to walk or cycle for short distances.

SOLUTION

Global warming raises the sea level due to which many coastal areas may get flooded.

SOLUTION

Honking sirens and horns of vehicles, loudspeakers, playing loud music are some of the sources which contribute to the noise pollution.

SOLUTION

Air pollution is caused by the smoke released from vehicles and factories, waste gases from factories, and burning of garbage.

SOLUTION

Deforestation is the elimination of forests by cutting or burning trees.

SOLUTION

The constituents of the soil are water, clay, minerals, sand, silt, rocks, gravel, air, organic materials.

SOLUTION

Earth is called the blue planet, since 70% of the Earth’s surface is covered with water.

SOLUTION

Atmosphere is the envelope of air surrounding the Earth.

SOLUTION

Air and Soil

SOLUTION

The given device is an e-reader. It is used as a device to read e-books. It is a portable device and helps one to store a large number of e-books.

SOLUTION

In times of a disaster, means of mass media helps in the following ways:

• They help to spread awareness.
• Radio and TV are used by the government, to communicate with the affected people.

SOLUTION

Classical dances and mime are the art forms that are used to convey emotions and messages through actions and facial expressions.

SOLUTION

Five ancient means of communication are:

• Blowing horns
• Flashing light
• Sending smoke signals
• Beating drum
• Using carrier pigeons

SOLUTION

Hint:

Smart Phones

FAX

Email

Inland Letter

SOLUTION

SOLUTION

Hint:

Benefits of increasing use of modern means of communication:

>Saves time

>Information becomes easily accessible

>Increases efficiency

SOLUTION

A smart phone is preferred over a mobile phone and a laptop because it can work simultaneously for both.

SOLUTION

Newspaper, magazines, books, radio are some examples.

Newspaper enhances our current awareness.

Magazines inform us on various issues.

Books give us subject knowledge.

Radio lets us listen to news as well as songs.

SOLUTION

i.                    Sailboat

ii.                  Raft

iii.                Steamer

iv.                Ferry

SOLUTION

Air transport aeroplane, helicopter, air balloons

Land transport bus, car, train

Water transport catamaran, speedboat, steamer

SOLUTION

Speedboat

SOLUTION

Sail boat

SOLUTION

True

SOLUTION

Disagree. Ferry is a boat, generally used for transporting passengers and goods.

SOLUTION

Bus

SOLUTION

Ship

SOLUTION

Ferry

SOLUTION

bus, train, ferry, airplane

SOLUTION

Land transport

SOLUTION

jet skis, barges, canoes etc.

SOLUTION

People living near water bodies.

SOLUTION

Answer may vary.

SOLUTION

Land transport, Air transport and Water transport.

SOLUTION

You can take pictures of the beautiful scenery around; see the small aquatic creatures inside the water and enjoy the ride.

SOLUTION

Ferry is a type of boat or a ship, generally used for transporting passengers or goods.

SOLUTION

 Ticket