Mariner’s compass is used to find the

(a)

speed

(b)

displacement

(c)

direction

(d)

motion

Which of the following processes add water vapour to the atmosphere?
i. Transpiration
ii. Precipitation
iii. Condensation
iv. Evaporation

(a)

ii and iii

(b)

ii and iv

(c)

i and iv

(d)

i and ii

Using R.O. (Reverse Osmosis) plant at home eliminates lot of non-potable water. The best way to effectively use the expelled water of R.O. plant is________.

(a)

make the expelled water go and seep near the bore well

(b)

use it for watering plants

(c)

to drink the expelled water after boiling and cooling

(d)

to use for cooking as the water is full of many nutrients

Phenol is ______.

(a)

carbolic acid

(b)

acetic acid

(c)

benzoic acid

(d)

hydrochloric acid

It is a biodegradable waste.

(a)

Plastic

(b)

Coconut Shell

(c)

Glass

(d)

Aluminium

Usage of chemical pesticides and fertilisers causes ________ pollution.

(a)

Air pollution

(b)

Water pollution

(c)

Noise pollution

(d)

None of the above

Natural Mosquito repellant is

(a)

Nutmag

(b)

Bamboo

(c)

Ginger

(d)

Neem

Which is the national tree of India?

(a)

Neem tree

(b)

Jack tree

(c)

Banyan tree

(d)

Mango tree

LINUX is a

(a)

Paid Software

(b)

Licensed Software

(c)

Free and Proprietary software

(d)

Free and Open source software

Find out Paid and Proprietary software from the given list

(a)

Windows

(b)

MAC OS

(c)

Adobe Photoshop

(d)

All the above

Paper is not a ______ material.

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magnetic

Water cycle is also called as_______.

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hydrological cycle

____________ is called as farmer’s best friend.

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Earthworm

Primary consumers that eat plants are called _________.

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Herbivore

I am the state tree of Tamilnadu . Who am I _____ ?

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Palm tree

Cloud

(1)

RAM

Soap

(2)

Input Device

Cement

(3)

Water vapour

Hardware

(4)

NaOH

Keyboard

(5)

RCC

How do people in cities and rural areas get water for various purposes?

Explain the uses of plaster of paris.

What are pollutants?

What are the pollutions caused by the objects given below?
a. Loud Speaker
b. Plastic

What is a spice?

Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?

Write a few slogans of your own on the topic “Save Water”.

Give reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

Ravi is a farmer; he rears many cattle in his farm. His field has many bio wastes. Advise Ravi how to change this bio waste to compost by using vermi - composting techniques. Explain the benefits of vermi castings.

What would happen if an organism is removed from the food chain?

Write the uses of neem?

What is Free and Open Source Software? Give any two examples?

You are provided with an iron needle. How will you magnetize it ?

Who is known as waterman of India? Browse the net and find the details about the award, the waterman received for water management. State the findings by drafting a report.

What is rainwater harvesting? Explain in a few sentences how it can be used in houses.

How are detergents manufactured?

Write a short note on noise pollution.

Write short notes on – Timber yielding plants.