People who made mariner’s compass for the first time.

(a)

Indians

(b)

Europeans

(c)

Chinese

(d)

Egyptians

Around 97% of water available on earth is________ water

(a)

fresh

(b)

pure

(c)

salty

(d)

polluted

Which of the following is not a part of water cycle?

(a)

evaporation

(b)

condensation

(c)

rain

(d)

distillation

The saponification of a fat or oil is done using _______________ solution for hot process.

(a)

Potassium hydroxide

(b)

Sodium hydroxide

(c)

Hydrochloric acid

(d)

Sodium chloride

Producers are________

(a)

Animals

(b)

Birds

(c)

Plants

(d)

Snakes

It is an undesirable change that occurs in air and water.

(a)

Recycling

(b)

Reuse

(c)

Pollution

(d)

Reduce

Which of the following medicinal plants has anticancer properties?

(a)

Amla

(b)

Tulasi

(c)

Turmeric

(d)

Aloe

Which is the national tree of India?

(a)

Neem tree

(b)

Jack tree

(c)

Banyan tree

(d)

Mango tree

Which of the following is correct?

(a)

Free and Open source

(b)

Free and Traditional software

(c)

Passive and Open source

(d)

Passive and Traditional source

LINUX is a

(a)

Paid Software

(b)

Licensed Software

(c)

Free and Proprietary software

(d)

Free and Open source software

A magnet always has __________ poles.

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two

Water cycle is also called as_______.

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hydrological cycle

_________ gas causes tears in our eyes while cutting onions.

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Propane thiols oxide

The 3R’s are Reduce, __________ and Recycle.

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 Reuse

The juice of the leaves of_____ plant relieves cough and bronchitis.

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Tulsi

Sun light

(1)

Evaporation

Fertilizers

(2)

C₆H₅ OH

Phenol

(3)

NPK

Keyboard

(4)

Input Device

LINUX

(5)

Free and Open source Software

How do aquatic animals manage to live in Arctic and Antarctic Circle?

Give an example for inorganic fertilizer.

What are pollutants?

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

Name any three medicinal plants, which are available in your area?

Explain the attraction and repulsion between magnetic poles.

The fresh water available on earth is only 3%. We cannot increase the amount of water. In that case, how can sustain the water level?

When there is no pond or lake in an area, will there be formation of clouds possible in that area?

Explain the process of manufacturing cement.

What is biodegradable waste?

What is a symbiotic relationship?

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

How does the electromagnetic train work?

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.

Comment on importance of plant animal interaction.